Kernel 2.6.27 update, laptop display brightness problem.
After the update to kernel 2.6.27 the display brightness resets to the highest level during the system startup. It resets to highest value somewhere during the udev processing. There is obviously some difference with display brightness handling because now I have in GNOME display of brightness level while changing (something like volume changing with multimedia keys). The brightness also resets to highest randomly while working in GNOME so I need to adjust it sveral times.
My laptop is HP nx7400. I have Arch64 installed. Also the problem appears on my brother's HP nx7300, almost same hardware.
Hi peart.
I am not kernel programmer, but I have analyzed the code of the ACPI video driver and the problematic patch. I have removed the check which sets the brightness to max but I can't compile because of not enough space to compile the kernel :S. Would you be so kind to compile the modified file and upload a compiled moduel to test.
I have following explanation for my modification:
Here http://git.kernel.org/?p=linux/kernel/g … 29c1ba8055 we can see that there is added check if ACPI BQC object exists. If the object doesn't exist then the brightness is set to max, which obviously is the problem with our laptops because the BQC object is optional. If we revert the patch completly the BCQ check is moved to the outter if-structure and the execution skips whole part, where the backlight device is registered.
My modification is that I removed the check for BCQ object and removed the part where it sets the backlight to max. As far as I can see acpi_video_get_brightness(device->backlight) can be called without prior checking of BCQ object existance, because acpi_video_get_brightness then calls acpi_video_device_lcd_get_level_current which gets the current brightness level. acpi_video_device_lcd_get_level_current checks if BCQ object exists and handles it properly, as far as I can see.
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#! /bin/sh
# Script to start or stop laptop_mode, and to control various settings of the
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# This script is a part of Laptop Mode Tools. If you are running a supported
# power management daemon, this script will be automatically called on power
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# Maintainer: Ritesh Raj Sarraf ([email protected])
# Original Author: Bart Samwel ([email protected])
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# Contributors to this script: Bart Samwel
# Kiko Piris
# Micha Feigin
# Andrew Morton
# Herve Eychenne
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# The laptop mode tools version number. Extracted by the installer makefile
# as well, so don't change the format!
LMTVERSION=1.59
# This script is loaded from multiple scripts to set the config defaults
# and to read the configuration on top of those. Only when the command is
# recognized does this script do anything else.
VERBOSE_OUTPUT=0
ENABLE_LAPTOP_MODE_ON_BATTERY=1
ENABLE_LAPTOP_MODE_ON_AC=0
ENABLE_LAPTOP_MODE_WHEN_LID_CLOSED=0
PARTITIONS="auto /dev/mapper/*"
LM_BATT_MAX_LOST_WORK_SECONDS=600
LM_AC_MAX_LOST_WORK_SECONDS=360
DEF_MAX_AGE=30
LM_READAHEAD=3072
NOLM_READAHEAD=128
CONTROL_READAHEAD=1
CONTROL_NOATIME=0
USE_RELATIME=1
CONTROL_HD_IDLE_TIMEOUT=1
LM_AC_HD_IDLE_TIMEOUT=4 # 20 seconds
LM_BATT_HD_IDLE_TIMEOUT=4 # 20 seconds
NOLM_HD_IDLE_TIMEOUT=244 # 2 hours
DEF_UPDATE=5
DEF_XFS_AGE_BUFFER=15
DEF_XFS_SYNC_INTERVAL=30
DEF_XFS_BUFD_INTERVAL=1
XFS_HZ=100
CONTROL_MOUNT_OPTIONS=1
BATT_HD_POWERMGMT=1
LM_AC_HD_POWERMGMT=254
NOLM_AC_HD_POWERMGMT=254
CONTROL_HD_POWERMGMT=0
CONTROL_HD_WRITECACHE=0
NOLM_AC_HD_WRITECACHE=1
NOLM_BATT_HD_WRITECACHE=0
LM_HD_WRITECACHE=0
LM_DIRTY_RATIO=60
LM_DIRTY_BACKGROUND_RATIO=1
NOLM_DIRTY_BACKGROUND_RATIO=10
NOLM_DIRTY_RATIO=40
LM_SECONDS_BEFORE_SYNC=2
BATT_CPU_MAXFREQ=medium
BATT_CPU_MINFREQ=slowest
BATT_CPU_GOVERNOR=ondemand
BATT_CPU_IGNORE_NICE_LOAD=1
LM_AC_CPU_MAXFREQ=fastest
LM_AC_CPU_MINFREQ=slowest
LM_AC_CPU_GOVERNOR=ondemand
LM_AC_CPU_IGNORE_NICE_LOAD=1
NOLM_AC_CPU_MAXFREQ=fastest
NOLM_AC_CPU_MINFREQ=slowest
NOLM_AC_CPU_GOVERNOR=ondemand
NOLM_AC_CPU_IGNORE_NICE_LOAD=0
CONTROL_CPU_FREQUENCY=0
HD="/dev/[hs]d[abcdefgh]"
CONTROL_SYSLOG_CONF=0
LM_AC_SYSLOG_CONF=/etc/syslog-on-ac-with-lm.conf
NOLM_AC_SYSLOG_CONF=/etc/syslog-on-ac-without-lm.conf
BATT_SYSLOG_CONF=/etc/syslog-on-battery.conf
SYSLOG_CONF_SIGNAL_PROGRAM=syslogd
SYSLOG_CONF=/etc/syslog.conf
CONTROL_DPMS_STANDBY=0
BATT_DPMS_STANDBY=300
LM_AC_DPMS_STANDBY=1200
NOLM_AC_DPMS_STANDBY=1200
CONTROL_CPU_THROTTLING=0
BATT_CPU_THROTTLING=medium
LM_AC_CPU_THROTTLING=minimum
NOLM_AC_CPU_THROTTLING=minimum
CONTROL_START_STOP=1
CONTROL_TERMINAL=0
TERMINALS="/dev/vc/1 /dev/vcs1"
BATT_TERMINAL_BLANK_MINUTES=1
BATT_TERMINAL_POWERDOWN_MINUTES=2
LM_AC_TERMINAL_BLANK_MINUTES=10
LM_AC_TERMINAL_POWERDOWN_MINUTES=10
NOLM_AC_TERMINAL_BLANK_MINUTES=10
NOLM_AC_TERMINAL_POWERDOWN_MINUTES=50
ENABLE_AUTO_HIBERNATION=0
HIBERNATE_COMMAND=/usr/sbin/hibernate
AUTO_HIBERNATION_ON_CRITICAL_BATTERY_LEVEL=1
DISABLE_LAPTOP_MODE_ON_CRITICAL_BATTERY_LEVEL=1
AUTO_HIBERNATION_BATTERY_CHARGE_MAH=0
AUTO_HIBERNATION_BATTERY_CHARGE_MWH=0
MINIMUM_BATTERY_CHARGE_MAH=0
MINIMUM_BATTERY_CHARGE_MWH=0
ASSUME_SCSI_IS_SATA=1
CONTROL_BRIGHTNESS=0
BATT_BRIGHTNESS_COMMAND=false
LM_AC_BRIGHTNESS_COMMAND=false
NOLM_AC_BRIGHTNESS_COMMAND=false
LOG_TO_SYSLOG=1
DEBUG=0
ENABLE_LAPTOP_MODE_TOOLS=1
# Initialize the PATH Variable
export PATH="${PATH}":/bin:/sbin:/usr/bin:/usr/sbin
# This is a 2 phase locking approach. LMT_REQ_LOCK is the outer lock and LMT_INVOC_LOCK is the inner lock
# We take this approach to ensure the scenario that, "At any point when an event occurs (AC/BATT), the
# kernel can generate multiple events spanning over a couple of events. The first event is honored and
# lmt executes. If the last event triggered at the 9th second, there is a fair chance that a good amount
# of state change would have occured in the OS, to honor that state, we keep an outer lock (LMT_REQ_LOCK)
# handy, so that those changes can also be applied and not forgotten.
# Workflow:
# Event-1 is generated and lmt executes (lmt runtime could span 5-10 seconds)
# At seventh second, 4 events generate. But Event-1 is still running.
# We don't want to discard all the remaining 4 events, but at least honor 1 so that we can act to the changes
# that occured in the last 7 seconds.
# So, Event-2 acquire LMT_REQ_LOCK and waits to acquire LMT_INVOC_LOCK (which is acquire by Event-1)
LMT_REQ_LOCK="/var/lock/lmt-req.lock"
LMT_INVOC_LOCK="/var/lock/lmt-invoc.lock"
FLOCK=`which flock`
checkint ()
# $1 arg should be the string/integer
# that you want to check for as an integer.
echo $1 | grep "[^0-9]" > /dev/null 2>&1
return $?;
# Returns 1 if it is an integer
# Function to handle logging
LOGGER=`which logger`;
log ()
# $1 should be msg type
# $2 should be the real msg
if [ x$LOG_TO_SYSLOG = x1 ]; then
# NOTE: Add the check on $2 being empty, once you are confident
# that there aren't any bugs in logging. And no bugs in executing
# modules and logging
if [ -x $LOGGER -a "$1" != "STATUS" ]; then
#if [ -z $2 ]; then
# continue
#elif [ "$1" = "MSG" ]; then
if [ "$1" = "MSG" ]; then
logger -p daemon.info -t laptop-mode "$2";
elif [ "$1" = "ERR" ]; then
logger -p daemon.err -t laptop-mode "$2";
elif [ "$1" = "VERBOSE" ]; then
if [ x$VERBOSE_OUTPUT = x1 ]; then
logger -p daemon.debug -t laptop-mode "$2";
fi
else
logger -p daemon.notice -t laptop-mode "$2";
fi
fi
fi
if [ "$1" = "VERBOSE" ]; then
$LM_VERBOSE && echo "$2" >/dev/fd/2;
elif [ "$1" = "ERR" ]; then
echo "$2" >/dev/fd/2;
else
# Message of type MSG and STATUS can go to stdout.
echo "$2" >/dev/fd/1;
fi
enableDebug ()
# Check if debug is enabled
if [ x$(($(basename $1 | cut -d . -f1 | tr "[:lower:]" "[:upper:]" | sed 's/-/_/g')_DEBUG)) = x1 ]; then
set -vx
fi
disableDebug ()
# Check if debug is enabled
if [ x$(($(basename $1 | cut -d . -f1 | tr "[:lower:]" "[:upper:]" | sed 's/-/_/g')_DEBUG)) = x1 ]; then
set +vx
fi
# No default on these ones -- we need to detect if they have been set, for
# backward compatibility with MINIMUM_BATTERY_MINUTES etc.
AUTO_HIBERNATION_BATTERY_CHARGE_PERCENT=
MINIMUM_BATTERY_CHARGE_PERCENT=
# Backward compatibility variable that is sometimes
# set externally (Debian init system)
unset VERBOSE
lmt_load_config ()
# Source config. Some config settings have been moved from the main config file
# to modular configuration files, and to support existing laptop-mode.conf
# files from earlier versions, we source the modular configuration files FIRST.
if [ -d /etc/laptop-mode/conf.d ] ; then
for CONF in /etc/laptop-mode/conf.d/*.conf ; do
if [ -r "$CONF" ] ; then
. "$CONF"
#Handle individual module debug settings
if [ "$DEBUG" -eq 1 ]; then
export $(basename $CONF | cut -d . -f1 | tr "[:lower:]" "[:upper:]" | sed 's/-/_/g')_DEBUG=1
log "VERBOSE" "Enabling debug mode for module $CONF"
fi
DEBUG=0
else
log "MSG" "Warning: Configuration file $CONF is not readable, skipping."
fi
done
fi
if [ -r /etc/laptop-mode/laptop-mode.conf ] ; then
. /etc/laptop-mode/laptop-mode.conf
else
log "ERR" "$0: Configuration file /etc/laptop-mode/laptop-mode.conf not present or not readable."
exit 1
fi
if [ x$ENABLE_LAPTOP_MODE_TOOLS = x0 ]; then
log "MSG" "laptop-mode-tools is disabled in config file. Exiting"
exit 0;
fi
# Add a simple bash debug mode switch
if [ "$DEBUG" -eq 1 ]; then
set -vx;
fi
# Support for old config settings
if [ "$AC_HD" != "" ] ; then
AC_HD_WITHOUT_LM="$AC_HD"
AC_HD_WITH_LM="$AC_HD"
fi
if [ "$VERBOSE" != "" ] ; then
VERBOSE_OUTPUT="$VERBOSE"
fi
if [ "$CPU_MAXFREQ" != "" ] ; then
BATT_CPU_MAXFREQ="$CPU_MAXFREQ"
fi
if [ "$MAX_AGE" != "" ] ; then
LM_BATT_MAX_LOST_WORK_SECONDS="$MAX_AGE"
LM_AC_MAX_LOST_WORK_SECONDS="$MAX_AGE"
fi
if [ "$DEF_AGE" != "" ] ; then
DEF_MAX_AGE="$DEF_AGE"
fi
if [ "$LAPTOP_MODE_ALWAYS_ON" != "" ] ; then
ENABLE_LAPTOP_MODE_ALWAYS="$LAPTOP_MODE_ALWAYS_ON"
fi
if [ "$LM_WHEN_LID_CLOSED" != "" ] ; then
ENABLE_LAPTOP_MODE_WHEN_LID_CLOSED="$LM_WHEN_LID_CLOSED"
fi
if [ "$REMOUNT_PARTITIONS" != "" ] ; then
PARTITIONS="$REMOUNT_PARTITIONS"
fi
if [ "$READAHEAD" != "" ] ; then
LM_READAHEAD="$READAHEAD"
fi
if [ "$DO_REMOUNT_NOATIME" != "" ] ; then
CONTROL_NOATIME="$DO_REMOUNT_NOATIME"
fi
if [ "$DO_HD" != "" ] ; then
CONTROL_HD_IDLE_TIMEOUT="$DO_HD"
fi
if [ "$AC_HD_WITH_LM" != "" ] ; then
LM_AC_HD_IDLE_TIMEOUT="$AC_HD_WITH_LM"
fi
if [ "$AC_HD_WITHOUT_LM" != "" ] ; then
NOLM_HD_IDLE_TIMEOUT="$AC_HD_WITHOUT_LM"
fi
if [ "$BATT_HD" != "" ] ; then
LM_BATT_HD_IDLE_TIMEOUT="$BATT_HD"
fi
if [ "$DO_REMOUNTS" != "" ] ; then
CONTROL_MOUNT_OPTIONS="$DO_REMOUNTS"
fi
if [ "$DO_HD_POWERMGMT" != "" ] ; then
CONTROL_HD_POWERMGMT="$DO_HD_POWERMGMT"
fi
if [ "$AC_HDPARM_POWERMGMT_WITH_LM" != "" ] ; then
LM_AC_HD_POWERMGMT="$AC_HDPARM_POWERMGMT_WITH_LM"
fi
if [ "$AC_HDPARM_POWERMGMT_WITHOUT_LM" != "" ] ; then
NOLM_AC_HD_POWERMGMT="$AC_HDPARM_POWERMGMT_WITHOUT_LM"
fi
if [ "$BATT_HDPARM_POWERMGMT" != "" ] ; then
BATT_HD_POWERMGMT="$BATT_HDPARM_POWERMGMT"
fi
if [ "$DO_WRITECACHE" != "" ] ; then
CONTROL_HD_WRITECACHE="$DO_WRITECACHE"
fi
if [ "$AC_WRITECACHE_WITHOUT_LM" != "" ] ; then
NOLM_AC_HD_WRITECACHE="$AC_WRITECACHE_WITHOUT_LM"
fi
if [ "$BATT_WRITECACHE" != "" ] ; then
LM_HD_WRITECACHE="$BATT_WRITECACHE"
fi
if [ "$DIRTY_RATIO" != "" ]; then
LM_DIRTY_RATIO="$DIRTY_RATIO"
fi
if [ "$DIRTY_BACKGROUND_RATIO" != "" ] ; then
LM_DIRTY_BACKGROUND_RATIO="$DIRTY_BACKGROUND_RATIO"
fi
if [ "$DEF_DIRTY_RATIO" != "" ]; then
NOLM_DIRTY_RATIO="$DEF_DIRTY_RATIO"
fi
if [ "$DEF_DIRTY_BACKGROUND_RATIO" != "" ] ; then
NOLM_DIRTY_BACKGROUND_RATIO="$DEF_DIRTY_BACKGROUND_RATIO"
fi
if [ "$DO_CPU" != "" ] ; then
CONTROL_CPU_FREQUENCY="$DO_CPU"
fi
if [ "$CONTROL_CPU_MAXFREQ" != "" ] ; then
CONTROL_CPU_FREQUENCY="$CONTROL_CPU_MAXFREQ"
fi
if [ "$AC_CPU_MAXFREQ_WITH_LM" != "" ] ; then
LM_AC_CPU_MAXFREQ="$AC_CPU_MAXFREQ_WITH_LM"
fi
if [ "$AC_CPU_MAXFREQ_WITHOUT_LM" != "" ] ; then
NOLM_AC_CPU_MAXFREQ="$AC_CPU_MAXFREQ_WITHOUT_LM"
fi
if [ "$DO_SYSLOG" != "" ] ; then
CONTROL_SYSLOG_CONF="$DO_SYSLOG"
fi
if [ "$SYSLOG_SIGNAL_PROGRAM" != "" ] ;then
SYSLOG_CONF_SIGNAL_PROGRAM="$SYSLOG_SIGNAL_PROGRAM"
fi
if [ "$AC_SYSLOG_WITH_LM" != "" ] ; then
LM_AC_SYSLOG_CONF="$AC_SYSLOG_WITH_LM"
fi
if [ "$AC_SYSLOG_WITHOUT_LM" != "" ] ; then
NOLM_AC_SYSLOG_CONF="$AC_SYSLOG_WITHOUT_LM"
fi
if [ "$BATT_SYSLOG" != "" ] ; then
BATT_SYSLOG_CONF="$BATT_SYSLOG"
fi
if [ "$ENABLE_LAPTOP_MODE_ALWAYS" != "" ] ; then
ENABLE_LAPTOP_MODE_ON_AC="$ENABLE_LAPTOP_MODE_ALWAYS"
fi
if [ "$MINIMUM_BATTERY_MINUTES" != "" -a "$MINIMUM_BATTERY_CHARGE_PERCENT" = "" ] ; then
# Use a very conservative estimate (1% = 1 battery minute, 100 minutes in a battery)
# for backward compatibility.
MINIMUM_BATTERY_CHARGE_PERCENT="$MINIMUM_BATTERY_MINUTES"
fi
if [ -z "$MINIMUM_BATTERY_CHARGE_PERCENT" ] ; then
# Apply the default, now that we've determined that this is the minimum.
MINIMUM_BATTERY_CHARGE_PERCENT=3
fi
if [ "$AUTO_HIBERNATION_BATTERY_MINUTES" != "" -a "$AUTO_HIBERNATION_BATTERY_CHARGE_PERCENT" = "" ] ; then
# Use a very conservative estimate (1% = 1 battery minute, 100 minutes in a battery)
# for backward compatibility.
AUTO_HIBERNATION_BATTERY_CHARGE_PERCENT="$AUTO_HIBERNATION_BATTERY_MINUTES"
fi
if [ -z "$AUTO_HIBERNATION_BATTERY_CHARGE_PERCENT" ] ; then
# Apply the default, now that we've determined that this is the minimum.
AUTO_HIBERNATION_BATTERY_CHARGE_PERCENT=2
fi
# Postprocessing
if [ "$VERBOSE_OUTPUT" -ne 0 ] ; then
OUTPUT="/dev/stdout"
LM_VERBOSE="[ 1 = 1 ]"
else
OUTPUT="/dev/null"
LM_VERBOSE="[ 1 = 0 ]"
fi
if [ "$PARTITIONS" = "" ] ; then
PARTITIONS="auto /dev/mapper/*"
fi
# Expand shell wild cards immediately.
PARTITIONS=$( echo $PARTITIONS )
TERMINALS=$( echo $TERMINALS )
# Convert seconds to hdparm -S format
# Everything over 20 minutes is interpreted as 2 hours.
seconds_to_hdparm_S() {
if [ "$1" -eq 0 ] ; then
# disable.
echo 0
elif [ "$1" -gt 0 -a "$1" -lt 5 ] ; then
# 5 seconds minimum
echo 1
elif [ "$1" -le $((240*5)) ] ; then
# Values between 1 and 240 signify increments of 5 seconds
echo $(($1 / 5))
elif [ "$1" -lt $((30*60)) ] ; then
# Values between 20 and 30 minutes are rounded up to 30 minutes.
echo 241
elif [ "$1" -lt $((12*30*60)) ] ; then
# Values between 30 minutes and 6 hours (exclusive) yield values between
# 241 and 251, in 30-minute increments.
echo $(( 240 + ($1 / (30*60)) ))
else
# Larger values effectively indicate no timeout at all.
echo 0
fi
# Convert configured idle timeouts to hdparm -S format.
if [ "$LM_AC_HD_IDLE_TIMEOUT_SECONDS" != "" ] ; then
LM_AC_HD_IDLE_TIMEOUT=$(seconds_to_hdparm_S $LM_AC_HD_IDLE_TIMEOUT_SECONDS)
fi
if [ "$LM_BATT_HD_IDLE_TIMEOUT_SECONDS" != "" ] ; then
LM_BATT_HD_IDLE_TIMEOUT=$(seconds_to_hdparm_S $LM_BATT_HD_IDLE_TIMEOUT_SECONDS)
fi
if [ "$NOLM_HD_IDLE_TIMEOUT_SECONDS" != "" ] ; then
NOLM_HD_IDLE_TIMEOUT=$(seconds_to_hdparm_S $NOLM_HD_IDLE_TIMEOUT_SECONDS)
fi
# The main workhorse.
lmt_main_function ()
if [ "$1" = "status" ] ; then
# Display a status report.
log "STATUS" "Mounts:"
mount | sed "s/^/ /"
log "STATUS" " "
log "STATUS" "Drive power status:"
for disk in $HD; do
if [ -r $disk ]; then
hdparm -C $disk 2>/dev/null | sed "s/^/ /"
else
log "STATUS" " Cannot read $disk, permission denied - $0 needs to be run as root"
fi
done
log "STATUS" " "
log "STATUS" "(NOTE: drive settings affected by Laptop Mode cannot be retrieved.)"
log "STATUS" " "
log "STATUS" "Readahead states:"
cat /etc/mtab | while read DEV MP FST OPTS DUMP PASS ; do
# skip funny stuff
case "$FST" in
rootfs|unionfs|tmpfs|squashfs|sysfs|usbfs|proc|devpts) continue
esac
if [ -b $DEV ] ; then
if [ -r $DEV ] ; then
log "STATUS" " $DEV: $((`blockdev --getra $DEV` / 2)) kB"
else
log "STATUS" " Cannot read $DEV, permission denied - $0 needs to be run as root"
fi
fi
done
log "STATUS" " "
if [ -e /var/run/laptop-mode-tools/enabled ] ; then
log "STATUS" "Laptop Mode Tools is allowed to run: /var/run/laptop-mode-tools/enabled exists."
else
log "STATUS" "Laptop Mode Tools is NOT allowed to run: /var/run/laptop-mode-tools/enabled does not exist."
fi
log "STATUS" " "
STATFILES="/proc/sys/vm/laptop_mode /proc/apm /proc/pmu/info /proc/sys/vm/bdflush /proc/sys/vm/dirty_ratio /proc/sys/fs/xfs/age_buffer /proc/sys/fs/xfs/sync_interval /proc/sys/fs/xfs/lm_age_buffer /proc/sys/fs/xfs/lm_sync_interval /proc/sys/vm/pagebuf/lm_flush_age /proc/sys/fs/xfs/xfsbufd_centisecs /proc/sys/fs/xfs/xfssyncd_centisecs /proc/sys/vm/dirty_background_ratio /proc/sys/vm/dirty_expire_centisecs /proc/sys/fs/xfs/age_buffer/centisecs /proc/sys/vm/dirty_writeback_centisecs /sys/devices/system/cpu/*/cpufreq/cpuinfo_*_freq /sys/devices/system/cpu/*/cpufreq/scaling_governor /proc/acpi/button/lid/*/state /proc/acpi/ac_adapter/*/state /proc/acpi/battery/*/state /sys/class/power_supply/*/online /sys/class/power_supply/*/state"
for THISFILE in $STATFILES ; do
if [ -e "$THISFILE" ] ; then
log "STATUS" "$THISFILE:"
if [ -r "$THISFILE" ] ; then
cat "$THISFILE" | sed "s/^/ /"
else
log "STATUS" " Not accessible, permission denied - $0 needs to be run as root."
fi
log "STATUS" " "
fi
done
elif [ "$1" != "readconfig" -a "$1" != "defaults" ] ; then
KLEVEL="$(uname -r |
IFS='.-' read a b c
echo $a.$b
KMINOR="$(uname -r |
IFS='.-' read a b c d
# Strip any stuff from the end -- only the initial digits are part of the KMINOR.
echo $c | sed -e 's/\([[:digit:]]*\).*/\1/'
# Stop exporting everything -- what we do from here is private.
set +a
if [ "$1" = "--version" ] ; then
log "MSG" "Laptop Mode Tools $LMTVERSION"
exit 0
fi
if [ ! -e /proc/sys/vm/laptop_mode ] ; then
log "ERR" "Kernel does not have support for laptop mode. Please apply the laptop mode"
log "ERR" "patch or install a newer kernel."
exit 1
fi
if [ ! -w /proc/sys/vm/laptop_mode ] ; then
log "ERR" "You do not have enough privileges to enable laptop_mode."
exit 1
fi
INIT=0 # Display info in init script format?
FORCE=0 # Force reapplying the current state?
while [ "$1" != "" ] ; do
case "$1" in
init) INIT=1 ;;
force) FORCE=1 ;;
# Old options. We always do "auto" for any option now, but
# we still have to accept the options.
start) ;;
stop) ;;
auto) ;;
modules=*)
MODULES=$1
MODULES=${MODULES#"modules="}
devices=*)
DEVICES=$1
DEVICES=${DEVICES#"devices="}
*) log "ERR" "Unrecognized option $1."
exit 1 ;;
esac
shift
done
mkdir -p /var/run/laptop-mode-tools
# Used to display laptop mode state later on. This is the enabled/disabled
# state for laptop mode processing, it tells us nothing about whether laptop
# mode is actually _active_.
STATE=enabled
if [ "$ENABLE_LAPTOP_MODE_ON_BATTERY" -eq 0 -a "$ENABLE_LAPTOP_MODE_ON_AC" -eq 0 -a "$ENABLE_LAPTOP_MODE_WHEN_LID_CLOSED" -eq 0 ] ; then
STATE=disabled
fi
# Determine the power state.
# First try /sys/class/power_supply/*
FOUND_SYS_CLASS_POWER_SUPPLY_AC=0
ON_AC=0
for POWER_SUPPLY in /sys/class/power_supply/* ; do
if [ -f $POWER_SUPPLY/type ] ; then
if [ "$(cat $POWER_SUPPLY/type)" = "Mains" ] ;then
log "VERBOSE" "Determining power state from $POWER_SUPPLY/online."
FOUND_SYS_CLASS_POWER_SUPPLY_AC=1
if [ "$(cat $POWER_SUPPLY/online)" = 1 ] ; then
ON_AC=1
fi
fi
fi
done
if [ $FOUND_SYS_CLASS_POWER_SUPPLY_AC = 1 ] ; then
# Already found it!
log "VERBOSE" "Not trying other options, already found a power supply."
elif [ -d /proc/acpi/ac_adapter ] ; then
log "VERBOSE" "Determining power state from /proc/acpi/ac_adapter."
ADAPTERS_FOUND=0
ON_AC=0
for ADAPTER in /proc/acpi/ac_adapter/* ; do
if [ -f $ADAPTER/state ] ; then
ADAPTERS_FOUND=1
STATUS=`awk '/^state: / { print $2 }' $ADAPTER/state`
if [ "$STATUS" = "on-line" ] ; then
ON_AC=1
fi
fi
done
if [ "$ADAPTERS_FOUND" -eq 0 ] ; then
ON_AC=1
fi
elif [ -f /proc/pmu/info ] ; then
log "VERBOSE" "Determining power state from /proc/pmu/info."
if ( grep -q "^AC Power.*0$" /proc/pmu/info ) ; then
log "VERBOSE" "/proc/pmu/info indicates absence of AC power."
ON_AC=0
else
# It is possible that there is no AC Power = 1 in the file,
# but we always assume AC power when we're not sure.
ON_AC=1
log "VERBOSE" "/proc/pmu/info indicates presence of AC power."
fi
elif [ -f /proc/apm ] ; then
log "VERBOSE" "Determining power state from /proc/apm."
read D1 D2 D3 APM_AC_STATE D0 </proc/apm
if [ "$APM_AC_STATE" = "0x00" ] ; then
ON_AC=0
else
ON_AC=1
fi
else
log "VERBOSE" "No /sys/class/power_supply, ACPI, APM or PMU power management information found -- assuming AC power is present."
ON_AC=1
fi
# Determine whether to activate or deactivate laptop mode.
ACTIVATE=0
if [ "$ON_AC" -eq 1 ] ; then
if [ "$ENABLE_LAPTOP_MODE_ON_AC" -ne 0 ] ; then
log "VERBOSE" "On AC power: Activating, because ENABLE_LAPTOP_MODE_ON_AC is set."
ACTIVATE=1
else
log "VERBOSE" "On AC power: Deactivating, because ENABLE_LAPTOP_MODE_ON_AC is not set."
ACTIVATE=0
fi
else
if [ "$ENABLE_LAPTOP_MODE_ON_BATTERY" -ne 0 ] ; then
log "VERBOSE" "On battery power: Activating, because ENABLE_LAPTOP_MODE_ON_BATTERY is set."
ACTIVATE=1
else
log "VERBOSE" "On battery power: Deactivating, because ENABLE_LAPTOP_MODE_ON_BATTERY is not set."
ACTIVATE=0
fi
fi
if [ "$ENABLE_LAPTOP_MODE_WHEN_LID_CLOSED" -ne 0 -a "$ACTIVATE" -eq 0 ] ; then
if [ -x "`which hal-find-by-property`" ] ; then
HAL_LID_BUTTON=$(hal-find-by-property --key "button.type" --string "lid")
fi
if [ "$HAL_LID_BUTTON" != "" ] ; then
HAL_LID_BUTTON_STATE=$(hal-get-property --udi $(hal-find-by-property --key "button.type" --string "lid") --key "button.state.value")
if [ "$HAL_LID_BUTTON_STATE" = "true" ] ; then
log "VERBOSE" "Setting action to \"start\" because the lid is closed (says HAL)."
ACTIVATE=1
fi
elif [ -f /proc/acpi/button/lid/*/state ] ; then
if ( grep -q "closed" /proc/acpi/button/lid/*/state ) ; then
log "VERBOSE" 'Setting action to "start" because the lid is closed (says /proc/acpi/button/lid/*/state).'
ACTIVATE=1
fi
else
log "MSG" "Warning: ENABLE_LAPTOP_MODE_WHEN_LID_CLOSED is set, but there is no file"
log "MSG" "/proc/acpi/button/lid/.../state, and hal information is not available either!"
fi
fi
# If the init script has not been run or has been run with the "stop"
# argument, then we should never start laptop mode.
if [ ! -f /var/run/laptop-mode-tools/enabled ] ; then
log "VERBOSE" "Laptop mode disabled because /var/run/laptop-mode-tools/enabled is missing."
STATE=disabled
fi
if [ "$ACTIVATE" -eq 1 -a -f /etc/default/laptop-mode ] ; then
. /etc/default/laptop-mode
if ! ( echo "$ENABLE_LAPTOP_MODE" |grep y ) ; then
log "VERBOSE" "Not starting laptop mode because it is disabled in /etc/default/laptop-mode."
STATE=disabled
fi
fi
if [ "$STATE" = "disabled" ] ; then
ACTIVATE=0
fi
# Check whether we are allowed to activate the data-loss-sensitive stuff.
# If the battery charge is too low, we want to disable this, but not the
# other power-saving stuff.
if [ "$ACTIVATE" -eq 0 ] ; then
ACTIVATE_WITH_POSSIBLE_DATA_LOSS=0
elif [ "$ON_AC" = 1 ] ; then
log "VERBOSE" "On AC, not checking minimum battery charge."
ACTIVATE_WITH_POSSIBLE_DATA_LOSS=1
else
ACTIVATE_WITH_POSSIBLE_DATA_LOSS=1
ENOUGH_CHARGE=0
ENOUGH_CHARGE_TO_PREVENT_HIBERNATION=0
# Weird way of checking that /sys/class/power_supply is not empty -- but it works.
if [ "$(echo /sys/class/power_supply/*)" != '/sys/class/power_supply/*' ] ; then
log "VERBOSE" "Not on AC and we have battery information in /sys/class/power_supply/BAT* -- checking minimum battery charge."
for BATT in /sys/class/power_supply/* ; do
BATT_TYPE=$(cat $BATT/type)
log "VERBOSE" "$BATT is of type $BATT_TYPE."
if [ "$BATT_TYPE" != "Battery" ] ; then
log "VERBOSE" "Not of type \"Battery\", skipping."
else
PREV_ENOUGH_CHARGE=$ENOUGH_CHARGE
PREV_ENOUGH_CHARGE_TO_PREVENT_HIBERNATION=$ENOUGH_CHARGE_TO_PREVENT_HIBERNATION
log "VERBOSE" "Checking levels for $BATT."
PRESENT=$(cat $BATT/present)
log "VERBOSE" "Present: $PRESENT."
# Only do if the battery is present
if [ "$PRESENT" -eq 1 ] ; then
FOUND_AN_ENABLED_CHECK=0
FOUND_AN_ENABLED_HIBERNATION_CHECK=0
# Get the remaining capacity.
IN_UAH=0
IN_UWH=0
if [ -f $BATT/charge_now ] ; then
REMAINING=$(cat $BATT/charge_now)
IN_UAH=1 # charge_* is in microAmpere-hours
elif [ -f $BATT/energy_now ] ; then
REMAINING=$(cat $BATT/energy_now)
IN_UWH=1 # energy_* is in microWatt-hours
else
REMAINING=0
fi
if [ -z "$REMAINING" -o "$REMAINING" -eq 0 ] ; then
log "VERBOSE" "Battery does not report remaining charge. Perhaps it is not present?"
REMAINING=0
fi
log "VERBOSE" "Remaining charge: $REMAINING"
if [ -f $BATT/charge_full_design ] ; then
CAPACITY=$(cat $BATT/charge_full_design)
elif [ -f $BATT/energy_full_design ] ; then
CAPACITY=$(cat $BATT/energy_full_design)
else
CAPACITY=0
fi
if [ -z "$CAPACITY" -o "$CAPACITY" -eq 0 ] ; then
log "VERBOSE" "Battery does not report design full charge, using non-design full charge."
if [ -f $BATT/charge_full ] ; then
CAPACITY=$(cat $BATT/charge_full)
elif [ -f $BATT/energy_full_design ] ; then
CAPACITY=$(cat $BATT/energy_full)
else
CAPACITY=0
fi
if [ -z "$CAPACITY" -o "$CAPACITY" -eq 0 ] ; then
log "VERBOSE" "Battery does not report non-design full charge."
CAPACITY=0
fi
fi
log "VERBOSE" "Full capacity: $CAPACITY"
# Check the charge percentage
if [ "$MINIMUM_BATTERY_CHARGE_PERCENT" -ne 0 ] ; then
FOUND_AN_ENABLED_CHECK=1
if [ "$CAPACITY" -eq 0 ] ; then
log "MSG" "WARNING: Battery does not report a capacity. Minimum battery"
log "MSG" "charge checking does not work without a design capacity."
ENOUGH_CHARGE=1
elif [ "$(($REMAINING * 100 / $CAPACITY))" -ge "$MINIMUM_BATTERY_CHARGE_PERCENT" ] ; then
ENOUGH_CHARGE=1
fi
fi
if [ "$AUTO_HIBERNATION_BATTERY_CHARGE_PERCENT" -ne 0 ] ; then
FOUND_AN_ENABLED_HIBERNATION_CHECK=1
if [ "$CAPACITY" -eq 0 ] ; then
log "MSG" "WARNING: Battery does not report a design capacity. Auto hibernation"
log "MSG" "does not work without a design capacity."
ENOUGH_CHARGE=1
elif [ "$(($REMAINING * 100 / $CAPACITY))" -ge "$AUTO_HIBERNATION_BATTERY_CHARGE_PERCENT" ] ; then
ENOUGH_CHARGE_TO_PREVENT_HIBERNATION=1
fi
fi
# $BATT/alarm is the design_capacity_warning of a battery.
ALARM_LEVEL=$(cat $BATT/alarm)
if [ "$ALARM_LEVEL" -ne 0 ] ; then
if [ "$REMAINING" -le "$ALARM_LEVEL" ] ; then
# Restore the state we had before checking this battery, so that
# this battery does not count as having enough charge.
ENOUGH_CHARGE=$PREV_ENOUGH_CHARGE
elif [ "$FOUND_AN_ENABLED_CHECK" -eq 0 ] ; then
# This is the only check that is enabled. In that case a non-critical
# battery level counts as "enough". (If we would count non-critical
# battery levels as enough *always*, then the other settings would
# have no effect; this is only a final fallback.)
ENOUGH_CHARGE=1
fi
fi
if [ "$AUTO_HIBERNATION_ON_CRITICAL_BATTERY_LEVEL" -ne 0 ] ; then
if [ "$REMAINING" -le "$ALARM_LEVEL" ] ; then
ENOUGH_CHARGE_TO_PREVENT_HIBERNATION=$PREV_ENOUGH_CHARGE_TO_PREVENT_HIBERNATION
elif [ "$FOUND_AN_ENABLED_HIBERNATION_CHECK" -eq 0 ] ; then
ENOUGH_CHARGE_TO_PREVENT_HIBERNATION=1
fi
fi
# Fallback: hard values
if [ "$IN_UAH" -ne 0 ] ; then
if [ "$MINIMUM_BATTERY_CHARGE_MAH" -ne 0 ] ; then
FOUND_AN_ENABLED_CHECK=1
if [ "$REMAINING" -ge $((1000*"$MINIMUM_BATTERY_CHARGE_MAH")) ] ; then
ENOUGH_CHARGE=1
fi
fi
if [ "$AUTO_HIBERNATION_BATTERY_CHARGE_MAH" -ne 0 ] ; then
FOUND_AN_ENABLED_HIBERNATION_CHECK=1
if [ "$REMAINING" -ge $((1000*"$AUTO_HIBERNATION_BATTERY_CHARGE_MAH")) ] ; then
ENOUGH_CHARGE_TO_PREVENT_HIBERNATION=1
fi
fi
elif [ "$IN_UWH" -ne 0 ] ; then
if [ "$MINIMUM_BATTERY_CHARGE_MWH" -ne 0 ] ; then
FOUND_AN_ENABLED_CHECK=1
if [ "$REMAINING" -ge $((1000*"$MINIMUM_BATTERY_CHARGE_MWH")) ] ; then
ENOUGH_CHARGE=1
fi
fi
if [ "$AUTO_HIBERNATION_BATTERY_CHARGE_MWH" -ne 0 ] ; then
FOUND_AN_ENABLED_HIBERNATION_CHECK=1
if [ "$REMAINING" -ge $((1000*"$AUTO_HIBERNATION_BATTERY_CHARGE_MWH")) ] ; then
ENOUGH_CHARGE_TO_PREVENT_HIBERNATION=1
fi
fi
else
log "ERR" "Failed to determine battery charge. Battery charge units are not in"
log "ERR" "mWh, uWh, mAh or uAh."
fi
else
log "VERBOSE" "Battery is not present."
fi
fi
done
elif [ "$(echo /proc/acpi/battery/*)" != '/proc/acpi/battery/*' ] ; then
log "VERBOSE" "Not on AC and we have batteries in /proc/acpi/battery -- checking minimum battery charge."
for BATT in /proc/acpi/battery/* ; do
PREV_ENOUGH_CHARGE=$ENOUGH_CHARGE
PREV_ENOUGH_CHARGE_TO_PREVENT_HIBERNATION=$ENOUGH_CHARGE_TO_PREVENT_HIBERNATION
BATT_STATE=$BATT/state
BATT_INFO=$BATT/info
log "VERBOSE" "Checking info and state for $BATT."
# Only do if the battery is present
if ( grep -q 'present:.*yes' $BATT_INFO ) ; then
FOUND_AN_ENABLED_CHECK=0
FOUND_AN_ENABLED_HIBERNATION_CHECK=0
# Get the remaining capacity.
REMAINING=`grep "remaining capacity:" $BATT_STATE | sed "s/.* \([0-9][0-9]* \).*/\1/" `
if [ -z "$REMAINING" ] ; then
log "VERBOSE" "Battery does not report remaining charte. Perhaps it is not present?"
REMAINING=0
fi
log "VERBOSE" "Remaining charge: $REMAINING"
CAPACITY=`grep "design capacity:" $BATT_INFO | sed "s/.* \([0-9][0-9]* \).*/\1/" `
if [ -z "$CAPACITY" ] ; then
log "VERBOSE" "Battery does not report capacity. Perhaps it is not present?"
CAPACITY=0
fi
log "VERBOSE" "Design capacity: $CAPACITY"
# Check the charge percentage
if [ "$MINIMUM_BATTERY_CHARGE_PERCENT" -ne 0 ] ; then
FOUND_AN_ENABLED_CHECK=1
if [ "$CAPACITY" -eq 0 ] ; then
log "MSG" "WARNING: Battery does not report a design capacity. Minimum battery"
log "MSG" "charge checking does not work without a design capacity."
ENOUGH_CHARGE=1
elif [ "$(($REMAINING * 100 / $CAPACITY))" -ge "$MINIMUM_BATTERY_CHARGE_PERCENT" ] ; then
ENOUGH_CHARGE=1
fi
fi
if [ "$AUTO_HIBERNATION_BATTERY_CHARGE_PERCENT" -ne 0 ] ; then
FOUND_AN_ENABLED_HIBERNATION_CHECK=1
if [ "$CAPACITY" -eq 0 ] ; then
log "MSG" "WARNING: Battery does not report a design capacity. Auto hibernation"
log "MSG" "does not work without a design capacity."
ENOUGH_CHARGE=1
elif [ "$(($REMAINING * 100 / $CAPACITY))" -ge "$AUTO_HIBERNATION_BATTERY_CHARGE_PERCENT" ] ; then
ENOUGH_CHARGE_TO_PREVENT_HIBERNATION=1
fi
fi
# Fallback: hard values.
# Determine the reporting unit.
IN_MAH=0
IN_MWH=0
if ( grep -q mWh $BATT_INFO ) ; then
IN_MWH=1
elif ( grep -q mAh $BATT_INFO ) ; then
IN_MAH=1
fi
if [ "$IN_MAH" -ne 0 ] ; then
if [ "$MINIMUM_BATTERY_CHARGE_MAH" -ne 0 ] ; then
FOUND_AN_ENABLED_CHECK=1
if [ "$REMAINING" -ge "$MINIMUM_BATTERY_CHARGE_MAH" ] ; then
ENOUGH_CHARGE=1
fi
fi
if [ "$AUTO_HIBERNATION_BATTERY_CHARGE_MAH" -ne 0 ] ; then
FOUND_AN_ENABLED_HIBERNATION_CHECK=1
if [ "$REMAINING" -ge "$AUTO_HIBERNATION_BATTERY_CHARGE_MAH" ] ; then
ENOUGH_CHARGE_TO_PREVENT_HIBERNATION=1
fi
fi
elif [ "$IN_MWH" -ne 0 ] ; then
if [ "$MINIMUM_BATTERY_CHARGE_MWH" -ne 0 ] ; then
FOUND_AN_ENABLED_CHECK=1
if [ "$REMAINING" -ge "$MINIMUM_BATTERY_CHARGE_MWH" ] ; then
ENOUGH_CHARGE=1
fi
fi
if [ "$AUTO_HIBERNATION_BATTERY_CHARGE_MWH" -ne 0 ] ; then
FOUND_AN_ENABLED_HIBERNATION_CHECK=1
if [ "$REMAINING" -ge "$AUTO_HIBERNATION_BATTERY_CHARGE_MWH" ] ; then
ENOUGH_CHARGE_TO_PREVENT_HIBERNATION=1
fi
fi
else
log "ERR" "Failed to determine battery charge. Battery charge units are not in"
log "ERR" "mWh or mAh."
fi
CAP_STATE=`sed -r 's/^capacity state:\s*(.*)\s*$/\1/;t;d' "$BATT_STATE"`
if [ "$DISABLE_LAPTOP_MODE_ON_CRITICAL_BATTERY_LEVEL" -ne 0 ] ; then
if [ "$CAP_STATE" = "critical" ] ; then
# Restore the state we had before checking this battery, so that
# this battery does not count as having enough charge.
ENOUGH_CHARGE=$PREV_ENOUGH_CHARGE
elif [ "$FOUND_AN_ENABLED_CHECK" -eq 0 ] ; then
# This is the only check that is enabled. In that case a non-critical
# battery level counts as "enough". (If we would count non-critical
# battery levels as enough *always*, then the other settings would
# have no effect; this is only a final fallback.)
ENOUGH_CHARGE=1
fi
fi
if [ "$AUTO_HIBERNATION_ON_CRITICAL_BATTERY_LEVEL" -ne 0 ] ; then
if [ "$CAP_STATE" = "critical" ] ; then
ENOUGH_CHARGE_TO_PREVENT_HIBERNATION=$PREV_ENOUGH_CHARGE_TO_PREVENT_HIBERNATION
elif [ "$FOUND_AN_ENABLED_HIBERNATION_CHECK" -eq 0 ] ; then
ENOUGH_CHARGE_TO_PREVENT_HIBERNATION=1
fi
fi
else
log "VERBOSE" "Battery is not present."
fi
done
else
ENOUGH_CHARGE=1
ENOUGH_CHARGE_TO_PREVENT_HIBERNATION=1
log "VERBOSE" "Not on AC and could not check battery state -- data loss sensitive features stay enabled and auto-hibernation will not work."
fi
if [ "$ENABLE_AUTO_HIBERNATION" -ne 0 -a "$ENOUGH_CHARGE_TO_PREVENT_HIBERNATION" -eq 0 ] ; then
log "VERBOSE" "None of the batteries have a charge above the auto-hibernation level."
log "VERBOSE" "Starting hibernation."
if [ -x $HIBERNATE_COMMAND ]; then
$HIBERNATE_COMMAND
elif [ -f /sys/power/state ]; then
grep -q disk /sys/power/state && echo disk > /sys/power/state
fi
# Don't continue -- if things are configured correctly, then we
# will be called on resume.
exit 0
fi
if [ "$ENOUGH_CHARGE" -eq 0 ] ; then
log "VERBOSE" "None of the batteries have a charge above the minimum level."
log "VERBOSE" "Deactivating data loss sensitive features."
ACTIVATE_WITH_POSSIBLE_DATA_LOSS=0
fi
fi
if [ "$INIT" -eq 0 ] ; then
log "MSG" "Laptop mode "
fi
# WAS_ACTIVE is used later on. If there is no /var/run/laptop-mode-tools/state, then
# we know that laptop mode wasn't active before.
WAS_ACTIVE=0
log "VERBOSE" "Checking if desired state is different from current state."
if [ -f /var/run/laptop-mode-tools/state ] ; then
read WAS_ACTIVE WAS_ON_AC WAS_ACTIVATE_WITH_POSSIBLE_DATA_LOSS WAS_STATE < /var/run/laptop-mode-tools/state
if [ "$WAS_STATE" != "" ] ; then
if [ "$WAS_ACTIVE" -eq "$ACTIVATE" -a "$WAS_ON_AC" -eq "$ON_AC" -a "$WAS_ACTIVATE_WITH_POSSIBLE_DATA_LOSS" -eq "$ACTIVATE_WITH_POSSIBLE_DATA_LOSS" -a "$WAS_STATE" = "$STATE" -a "$FORCE" -eq 0 ] ; then
log "MSG" "$STATE, "
if [ "$WAS_ACTIVE" -eq 1 ] ; then
log "MSG" "active [unchanged]"
if [ "$ACTIVATE_WITH_POSSIBLE_DATA_LOSS" -eq 0 ] ; then
log "MSG" " (Data-loss sensitive features disabled.)"
fi
else
log "MSG" "not active [unchanged]"
fi
exit 0
fi
fi
else
log "VERBOSE" "/var/run/laptop-mode-tools/state does not exist, no previous state."
fi
echo "$ACTIVATE $ON_AC $ACTIVATE_WITH_POSSIBLE_DATA_LOSS $STATE" > /var/run/laptop-mode-tools/state
if [ "$ACTIVATE" -eq 1 ] ; then
log "MSG" "$STATE, active"
if [ "$ACTIVATE_WITH_POSSIBLE_DATA_LOSS" -eq 0 ] ; then
log "MSG" " (Data-loss sensitive features disabled.)"
fi
else
log "MSG" "$STATE, not active"
fi
# Finally, call laptop-mode-tools modules. The modules can use the settings
# from the config files, but they may NOT assume the settings actually exist,
# as no defaults have been given for them.
# Note that the /usr/local/lib path is deprecated.
export FORCE STATE ON_AC ACTIVATE ACTIVATE_WITH_POSSIBLE_DATA_LOSS KLEVEL KMINOR WAS_ACTIVE LM_VERBOSE DEVICES
for SCRIPT in /usr/share/laptop-mode-tools/modules/* /usr/local/lib/laptop-mode-tools/modules/* /usr/local/share/laptop-mode-tools/modules/* /etc/laptop-mode/modules/* ; do
if [ -z "$MODULES" ] ; then
# If a module list has not been provided, execute all modules
EXECUTE_SCRIPT=1
else
# If a module list has been provided, execute only the listed
# modules.
EXECUTE_SCRIPT=0
for MODULE in $MODULES; do
# Attempt to remove the module name from the end of the
# full script path. If the module name matches the
# script, the name will be removed from the end of the
# full file path, leaving the path to the script. If
# there was not a match made, the module name would not
# be removed from the path, and $PATH_TO_SCRIPT would
# be the same as $SCRIPT.
PATH_TO_SCRIPT=${SCRIPT%%$MODULE}
# Execute the script if a match was found (module name
# was removed from the script path, making it shorter.
if [ $PATH_TO_SCRIPT != $SCRIPT ] ; then
EXECUTE_SCRIPT=1
fi
done
fi
if [ -x "$SCRIPT" -a $EXECUTE_SCRIPT -eq 1 ] ; then
log "VERBOSE" "Invoking module $SCRIPT."
SCRIPT_DEBUG=$SCRIPT; # We do this because in start-stop-programs module a $SCRIPT variable is used. That
# changes the whole meaning when passed to disableDebug ()
enableDebug $SCRIPT_DEBUG;
. $SCRIPT
disableDebug $SCRIPT_DEBUG;
else
log "VERBOSE" "Module $SCRIPT is not executable or is to be skipped."
fi
done
exit 0
# This fi closes the if for "readconfig". If I would have indented this one
# I would have indented the whole file. :)
fi
lmt_load_config
lock_retry ()
( $FLOCK -n -x -w 1 8 || exit 0;
i=10;
while [ $i -ge 1 ]
do
log "ERR" "Couldn't acquire lock. Retrying.... PID is $$\n"
$FLOCK -x -w 1 9 && lmt_main_function "$@" && break;
i=$(( $i - 1 ))
done
) 8>$LMT_REQ_LOCK
# Check and acquire locks and then exec.
( $FLOCK -n -x -w 1 8; ) 8>$LMT_REQ_LOCK
($FLOCK -n -x -w 1 9 && lmt_main_function "$@";) || lock_retry "$@"
) 9<>$LMT_INVOC_LOCK
# We do a special run of battery polling daemon here so that it does not get
# plagued by the lock. We need the polling daemon to be independent of any locks
if [ x$ENABLE_BATTERY_LEVEL_POLLING = x1 ] && [ x$BLACKLIST_IN_FLOCK = x1 ]; then
log "VERBOSE" "Battery level polling is enabled."
if [ x$ON_AC = x1 ] ; then
log "VERBOSE" "On AC, stopping the polling daemon."
# In AC mode we disable the polling daemon.
killall -q lm-polling-daemon
else
if ! pidof -x lm-polling-daemon ; then
log "VERBOSE" "On battery and there was no polling daemon yet, starting the polling daemon."
# If there is no polling daemon, we start one.
/usr/share/laptop-mode-tools/module-helpers/lm-polling-daemon < /dev/null > /dev/null 2> /dev/null &
fi
fi
else
log "VERBOSE" "Battery level polling is disabled."
fi
exit 0;
and here is the lines which archwiki mentions
case "$KLEVEL" in
"2.4" ) ;;
"2.6" ) ;;
log "ERR" "Unhandled kernel version: $KLEVEL ('uname -r' = '$(uname -r)')" >&2
exit 1
esacI had the problem but edited the line in /usr/sbin/laptop_mode and it worked. But thoes lines are not there anymore. I guess they changed it at the recent update of laptop-mode-tools.
Regarding your heat problem; is there any other thing you use to cut down power usage (from AUR maybe)? I use acpi_call from AUR had to edit lines there aswell, but it should be updated by now. -
(SOLVED) Display brightness disappeared from Power Options in Vista, Lenovo G530
Hello board,
My system Lenovo G530 product ID 444638U
I used to be able to adjust display brightness in Vista from Control Panel > Power Options. I could set how bright when on battery and how bright when on AC. Also, it used to be that when I unplugged power cable it would automatically adjust my brightness according to those settings. Now, nothing happens when I unplug power cable, not even a beep.
Possible problem is as follows, but let's keep an open mind to other things as well. I spilled beer on keyboard recently. ONLY on keyboard I am sure. I replaced keyboard with something that fits but something that isn't made for my laptop, has different arrangement of Fn+ keys. Basically ever since the beer accident and ever since I replaced keyboard I had this brightness issue.
Please help me solve this.
-Alex
Solved!
Go to Solution.I solved this problem..
Solution is to upgrade the BIOS to latest version. I am not sure actually whether latest BIOS had the needed fix or not, or it was just the process of updating the BIOS that solved this issue. But no doubt, after flashing the BIOS, display brightness function reappeared! -
Attaching external monitor resets laptop display scale
Sometimes when I connect my Thunderbolt monitor to my Macbook the laptop display resets back to no scaling. This ***** because I then have to change it back and fix all my windows. This happens maybe 15% of the time; it's happened many times now.
I've also had one case where on restart the laptop reset the scale. It was not connected to the external monitor when that happened.
Anyone else having this problem? Any ideas on how to fix it?Hi there , Thank you for visiting the HP Support Forums and Welcome! This is a great site to get answers and ask questions. I see that you wanted to know if there was a way to hook your Spectre X360 up to an External Monitor and be able to close the lid to your Notebook without it going to sleep. I did some research on this for you also. In Power Options, Choose what closing the lid does, you should have an option that says "Do nothing". Set it to "Do Nothing". Here is a video for you this video explains how to change the Power Option settings to "Do Nothing". If you do not see this option, please do all of your driver updates either with the HP Driver's website for your specific Spectre X36 Notebook, or you can do them using the HP Support Assistant. You can change the Power Settings when on battery and when plugged in directly. You could change the settings when you do not have an external monitor plugged in to sleep when the lid is closed. Thank you for writing on the HP Support Forums! Have a great day!
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Default Display brightness is too high.
Hi, i am using latest B2G 2.2 [2014-10-08, flame phone]
Default display brightness almost 90%,
Every time i update firmware, i set this value to 10%.
i think this value is too high, it consume more battery.Hi, my point is default value is too high,
it affect battery life.
user some time forget set this value,
so i think this value should be changed by default.
now, i set this value to 0%
indoor, i can see my flame screen clearly with 0% -
X230 display brightness changes automatically
Hi,
I have a problem when I'm using my X230 from battery: every know and then the display brightness changes, it gets lower (even without any user activity). Also it seems that the color profile also changes, colors look washed out. After few minutes or sometimes seconds, it goes back to normal. However, I have this issue quite often.
Is there a solution? Is it something to do with my power settings?
Thank you.
Solved!
Go to Solution.zombyorc,
Try the following.
http://forums.lenovo.com/t5/W-Series-ThinkPad-Laptops/Disabling-Auto-Screen-brightness-on-Intel-HD-G...
or
http://forums.lenovo.com/t5/T400-T500-and-newer-T-series/T410-screen-brightness-dims-washes-out-on-b...
*Non Lenovo employee*
I have a Y2P (i5) ... Feel free to ping me if you want me to test some applications with your Y2P if you have the same model. I don't mind keep doing recovery on it if needed .... =) -
Cannot adjust display brightness via F-keys nor Preferences
After updating Mavericks to 10.9.4, I cannot adjust the display brightness. Using the F1-2 keys will show the brightness icon that usually pops up. However, it's stuck and nothing happens when I press either F1 or F2 (the brightness keys).
I tried going into Preferences and adjust the brightness from there. "Automatically adjust brightness" is not checked and when I drag the slider, it slides back to where it initially was.
How can I fix this problem?
Thank you in advance,
FilipHello Gnazty,
Thanks for using Apple Support Communities.
I'd like you to reset your SMC and PRAM as the articles below describe:
OS X Mavericks: Reset your computer’s PRAM
http://support.apple.com/kb/ph14222
Intel-based Macs: Resetting the System Management Controller (SMC)
http://support.apple.com/kb/HT3964
Take care,
Alex H. -
[SOLVED] Can't change laptop screen brightness.
I'm using GNOME and can't seem to change my laptop screen brightness. The slider in settings will work by changing the value in intel_backlight between 0 and 4882 but the actual brightness of the screen will not change.
If I use the kernel line acpi_video = vendor all it does is create another interface called dell_backlight alongside intel_backlight which changes from 0 to 15 by changing the slider or pressing fn + f5 and fn + f4.
I have nouveau and intel graphics drivers installed and I'm running arch on a Dell XPS15 (L521x).
Any help would be appreciated.
EDIT: Solved this by adding the kernel parameter video.use_native_backlight=0
Last edited by badministrator (2015-04-12 05:33:33)Head_on_a_Stick wrote:
Have you tried this kernel parameter:
video.use_native_backlight=1
Other possibilities listed here:
https://wiki.archlinux.org/index.php/In … adjustable
Yes I have tried this, unfortunately GDM will not start if this is enabled. -
Hello,
Automatic display brightness adjusting on my mid-2010 13" MacBook Pro somehow gets stuck. For example, when I work in bright room and put the computer to sleep (close the lid) the brightness level remains high when I wake the computer in darker ambience. The same happens in opposite direction, when the computer goes to sleep in darker room and wake in brighter, the screen brightness remains at low settings. Is there a way to reset the system to default brightness settings? I was satisfied with default behavior of automatic illumination and all these problems arise after I manually adjusted brightness using F1-F2 keys. Otherwise, illumination adjustments work when I cover the sensor. I can notice screen going darker or lighter when room lighting conditions change.
I tried resetting SMC, but it didn't fix the problem. Do you have any suggestions?
AleksandarRelated post: http://forums.lenovo.com/t5/Windows-7-Discussion/Brightness-unadjustable-for-quot-High-Performance-q...
[Quote]
A link to the 3.09/3.10 version of BIOS is given below. Good luck. This is the version I used.
http://www-307.ibm.com/pc/support/site.wss/document.do?lndocid=MIGR-70351
[End Quote]
T500 BIOS Update: http://www-307.ibm.com/pc/support/site.wss/document.do?lndocid=MIGR-70353
~ sierra42 ~
HP TC4400
Lenovo T500
-- I am not support, I'm just trying to help! -- -
OPTION to adjust display brightness on nokia asha ...
Hi NOKIA Representative,
Please provide the support and option to adjust display brightness on NOKIA ASHA 200 in the next software update. (I have NOKIA 200 V11.56 showing manfacturing date 26-03-12).
Adjustment of display brightness is very basic and important feature in any phone, how come NOKIA forgot it in this model (NOKIA ASHA 200) ??
Thanks,
Raven777The manual display brightness option should be added to the device in the 11.81 (or newer) SW updates - so try updating your phone SW.
http://www.microsoft.com/en/mobile/nokia-x-updates/
http://www.microsoft.com/en/mobile/nokia-x2-update/
http://www.microsoft.com/en/mobile/asha-software-update/
http://www.microsoft.com/en/mobile/support/software-update/wp8-software-update/
http://www.developer.nokia.com/Community/Wiki/Nokia_firmware_change_logs
https://twitter.com/LumiaSWUpdates -
T440s Turn off auto display brightness
I'm trying to turn off the auto brightness on my T440 but nothing I found so far is working.
I edited all power plans and it turned off the Auto display brightness in windows 8.1, and i also disabled the "Display Power Saving Technology" in the graphics control panel under Power.
It's dimming even with cable plugged in. If the screen consists of mostly black images, it dims.. if there is white, it brightens.
Any help how I could fix this is appreciated! I have latest everything, all drivers, etc. I have latest System Update 5 update manager which downloaded and installed everything possible.I seem to have fixed it.. but not sure what it was, I did a few things. I did another update which downloaded a Dependency manager which was critical.. and I also did a safe mode start which failed to start and nearly bricked the machine.. only a CD was able to revive the boot process.. it would boot to a blank screen with no start options even available.
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B540P Display brightness not adjustable
Hello,
i have just bought the Lenovo B540P VDZ9EGE (i5, GT650M, Windows 8 64bit)) and i have a problem. I can not change the screen brightness, neither with touch on the button of the screen, nor in Windows 8. In Windows 8 it says: not available and I can not click on it. The screen brightness is always on the highest setting I think. It would be nice, if you could help me. Thank you very much. I apologize for my english.hi BK86,
If you have the IdeaCentre™ B540p (3363) with the NVIDIA® GeForce® GT650M, can you try to :
1. Update the display driver to GeForce 314.07 DriverVersion 314.07 - WHQL from the nvidia website.
2. Run Windows Update to get the latest patch and bug fixes.
After doing the steps above, try to press the brightness Up or Down button on the LCD panel
Spoiler (Highlight to read)
Hope this helps.
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