Black screen after pm-suspend

Last week I purchased a hp dv6 and immediately installed arch linux as the only operating system. So far, everything seems to be working fine except that the screen will not turn back on when the laptop resumes from its suspended state. I am using acpid and pm-suspend to successfully achieve the suspended state. I know for sure that the laptop has successfully resumed operation because I am able to run commands including more suspends through sudo pm-suspend and even complete shutdowns though sudo shutown -h. Obviously the screen does not turn on at all and remains black throughout.
I have scanned the wiki, but the solutions I have found are focused on problems with the computer not resuming. My computer seems to be resuming just fine except for turning the screen back on. Any help would be greatly appreciated. I use arch linux extensively and every day for work (hp dv5), and I am looking forward to using my dv6 the same way.

I'm having the same exact problem, but my computer is a Lenovo Ideapad. Here is some hopefully useful info:
uname -a:
[declan@buttzmachine ~]$ uname -a
Linux buttzmachine 3.4.7-1-ARCH #1 SMP PREEMPT Sun Jul 29 22:02:56 CEST 2012 x86_64 GNU/Linux
[declan@buttzmachine ~]$ cat /proc/
Display all 160 possibilities? (y or n)
[declan@buttzmachine ~]$ cat /proc/cpuinfo
processor : 0
vendor_id : AuthenticAMD
cpu family : 18
model : 1
model name : AMD A6-3420M APU with Radeon(tm) HD Graphics
stepping : 0
microcode : 0x3000027
cpu MHz : 800.000
cache size : 1024 KB
physical id : 0
siblings : 4
core id : 0
cpu cores : 4
apicid : 0
initial apicid : 0
fpu : yes
fpu_exception : yes
cpuid level : 6
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ht syscall nx mmxext fxsr_opt pdpe1gb rdtscp lm 3dnowext 3dnow constant_tsc rep_good nopl nonstop_tsc extd_apicid aperfmperf pni monitor cx16 popcnt lahf_lm cmp_legacy svm extapic cr8_legacy abm sse4a misalignsse 3dnowprefetch osvw ibs skinit wdt arat cpb hw_pstate npt lbrv svm_lock nrip_save pausefilter
bogomips : 2995.47
TLB size : 1536 4K pages
clflush size : 64
cache_alignment : 64
address sizes : 40 bits physical, 48 bits virtual
power management: ts ttp tm stc 100mhzsteps hwpstate cpb
processor : 1
vendor_id : AuthenticAMD
cpu family : 18
model : 1
model name : AMD A6-3420M APU with Radeon(tm) HD Graphics
stepping : 0
microcode : 0x3000027
cpu MHz : 800.000
cache size : 1024 KB
physical id : 0
siblings : 4
core id : 1
cpu cores : 4
apicid : 1
initial apicid : 1
fpu : yes
fpu_exception : yes
cpuid level : 6
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ht syscall nx mmxext fxsr_opt pdpe1gb rdtscp lm 3dnowext 3dnow constant_tsc rep_good nopl nonstop_tsc extd_apicid aperfmperf pni monitor cx16 popcnt lahf_lm cmp_legacy svm extapic cr8_legacy abm sse4a misalignsse 3dnowprefetch osvw ibs skinit wdt arat cpb hw_pstate npt lbrv svm_lock nrip_save pausefilter
bogomips : 2995.47
TLB size : 1536 4K pages
clflush size : 64
cache_alignment : 64
address sizes : 40 bits physical, 48 bits virtual
power management: ts ttp tm stc 100mhzsteps hwpstate cpb
processor : 2
vendor_id : AuthenticAMD
cpu family : 18
model : 1
model name : AMD A6-3420M APU with Radeon(tm) HD Graphics
stepping : 0
microcode : 0x3000027
cpu MHz : 800.000
cache size : 1024 KB
physical id : 0
siblings : 4
core id : 2
cpu cores : 4
apicid : 2
initial apicid : 2
fpu : yes
fpu_exception : yes
cpuid level : 6
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ht syscall nx mmxext fxsr_opt pdpe1gb rdtscp lm 3dnowext 3dnow constant_tsc rep_good nopl nonstop_tsc extd_apicid aperfmperf pni monitor cx16 popcnt lahf_lm cmp_legacy svm extapic cr8_legacy abm sse4a misalignsse 3dnowprefetch osvw ibs skinit wdt arat cpb hw_pstate npt lbrv svm_lock nrip_save pausefilter
bogomips : 2995.47
TLB size : 1536 4K pages
clflush size : 64
cache_alignment : 64
address sizes : 40 bits physical, 48 bits virtual
power management: ts ttp tm stc 100mhzsteps hwpstate cpb
processor : 3
vendor_id : AuthenticAMD
cpu family : 18
model : 1
model name : AMD A6-3420M APU with Radeon(tm) HD Graphics
stepping : 0
microcode : 0x3000027
cpu MHz : 800.000
cache size : 1024 KB
physical id : 0
siblings : 4
core id : 3
cpu cores : 4
apicid : 3
initial apicid : 3
fpu : yes
fpu_exception : yes
cpuid level : 6
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ht syscall nx mmxext fxsr_opt pdpe1gb rdtscp lm 3dnowext 3dnow constant_tsc rep_good nopl nonstop_tsc extd_apicid aperfmperf pni monitor cx16 popcnt lahf_lm cmp_legacy svm extapic cr8_legacy abm sse4a misalignsse 3dnowprefetch osvw ibs skinit wdt arat cpb hw_pstate npt lbrv svm_lock nrip_save pausefilter
bogomips : 2995.47
TLB size : 1536 4K pages
clflush size : 64
cache_alignment : 64
address sizes : 40 bits physical, 48 bits virtual
power management: ts ttp tm stc 100mhzsteps hwpstate cpb
I'm using the /etc/acpi/handler.sh script to suspend it when the lid is closed. I basically used what was on the acpid wiki page, and acpid is in my daemons array. Handler.sh:
#!/bin/sh
# Default acpi script that takes an entry for all actions
minspeed=`cat /sys/devices/system/cpu/cpu0/cpufreq/cpuinfo_min_freq`
maxspeed=`cat /sys/devices/system/cpu/cpu0/cpufreq/cpuinfo_max_freq`
setspeed="/sys/devices/system/cpu/cpu0/cpufreq/scaling_setspeed"
set $*
case "$1" in
button/power)
case "$2" in
PBTN|PWRF)
logger "PowerButton pressed: $2"
poweroff
logger "ACPI action undefined: $2"
esac
button/sleep)
case "$2" in
SLPB|SBTN)
echo -n mem >/sys/power/state
logger "ACPI action undefined: $2"
esac
ac_adapter)
case "$2" in
AC|ACAD|ADP0)
case "$4" in
00000000)
echo -n $minspeed >$setspeed
#/etc/laptop-mode/laptop-mode start
00000001)
echo -n $maxspeed >$setspeed
#/etc/laptop-mode/laptop-mode stop
esac
logger "ACPI action undefined: $2"
esac
battery)
case "$2" in
BAT0)
case "$4" in
00000000)
logger 'Battery online'
00000001)
logger 'Battery offline'
esac
CPU0)
*) logger "ACPI action undefined: $2" ;;
esac
button/lid)
case "$3" in
close)
logger 'LID closed'
/usr/sbin/pm-suspend
open)
logger 'LID opened'
logger "ACPI action undefined: $3"
esac
logger "ACPI group/action undefined: $1 / $2"
esac
# vim:set ts=4 sw=4 ft=sh et:
Here's what I'm doing: I have music playing, and a terminal with "sudo halt" typed in already. Then I close the lid and the music stops. Then, I open the lid, and the music resumes, so I know it has essentially woken up. Then I enter my password and hit enter, and the music dies and the machine is clearly off. So it's definitely waking up, but the screen just isn't.
This is very frustrating, what can we do?
Thanks!
Edit: Some more maybe useful info:
/var/log/pm-suspend.log:
disabled, not active
HDIO_DRIVE_CMD(identify) failed: Invalid argument
HDIO_DRIVE_CMD(identify) failed: Invalid argument
/usr/lib/pm-utils/sleep.d/01laptop-mode resume suspend: success.
Running hook /usr/lib/pm-utils/sleep.d/01grub resume suspend:
/usr/lib/pm-utils/sleep.d/01grub resume suspend: success.
Running hook /usr/lib/pm-utils/sleep.d/00powersave resume suspend:
/usr/lib/pm-utils/sleep.d/00powersave resume suspend: success.
Running hook /usr/lib/pm-utils/sleep.d/00logging resume suspend:
/usr/lib/pm-utils/sleep.d/00logging resume suspend: success.
Sat Aug 4 10:53:44 EDT 2012: Finished.
lsmod:
[declan@buttzmachine ~]$ lsmod
Module Size Used by
rts5139 340465 0
snd_hda_codec_realtek 60409 1
uvcvideo 69437 0
snd_hda_codec_hdmi 23672 1
joydev 9991 0
videobuf2_vmalloc 2468 1 uvcvideo
videobuf2_memops 2246 1 videobuf2_vmalloc
videobuf2_core 20415 1 uvcvideo
videodev 93086 1 uvcvideo
media 10213 2 uvcvideo,videodev
snd_hda_intel 24053 0
radeon 852098 2
i2c_algo_bit 5391 1 radeon
drm_kms_helper 33051 1 radeon
ttm 64320 1 radeon
arc4 1410 2
snd_hda_codec 94305 3 snd_hda_codec_realtek,snd_hda_codec_hdmi,snd_hda_intel
ath9k 93070 0
ath9k_common 2096 1 ath9k
ath9k_hw 342102 2 ath9k_common,ath9k
r8169 49418 0
drm 208958 4 ttm,drm_kms_helper,radeon
snd_hwdep 6300 1 snd_hda_codec
ath 15425 3 ath9k_common,ath9k,ath9k_hw
microcode 12185 0
snd_pcm 74958 3 snd_hda_codec_hdmi,snd_hda_codec,snd_hda_intel
snd_page_alloc 7217 2 snd_pcm,snd_hda_intel
snd_timer 18966 1 snd_pcm
snd 58997 7 snd_hda_codec_realtek,snd_hwdep,snd_timer,snd_hda_codec_hdmi,snd_pcm,snd_hda_codec,snd_hda_intel
soundcore 5410 1 snd
i2c_piix4 8224 0
mac80211 395680 1 ath9k
i2c_core 20369 6 drm,i2c_piix4,drm_kms_helper,i2c_algo_bit,radeon,videodev
mii 4123 1 r8169
acer_wmi 21010 0
cfg80211 170106 3 ath,ath9k,mac80211
powernow_k8 13360 0
mperf 1299 1 powernow_k8
ideapad_laptop 8470 0
serio_raw 4653 0
psmouse 70792 0
wmi 8475 1 acer_wmi
pcspkr 1899 0
ac 2376 0
k10temp 2915 0
button 4502 0
evdev 9754 21
sparse_keymap 3056 2 acer_wmi,ideapad_laptop
processor 26567 5 powernow_k8
battery 6517 0
thermal 7959 0
video 11307 1 acer_wmi
rfkill 15604 4 cfg80211,acer_wmi,ideapad_laptop
ext4 424175 3
crc16 1359 1 ext4
jbd2 73919 1 ext4
mbcache 5977 1 ext4
usbhid 36462 0
hid 85509 1 usbhid
sd_mod 29239 4
sr_mod 14823 0
cdrom 35648 1 sr_mod
ohci_hcd 21752 0
ahci 20549 3
libahci 20023 1 ahci
libata 167611 2 ahci,libahci
ehci_hcd 41026 0
scsi_mod 132974 4 rts5139,libata,sd_mod,sr_mod
usbcore 147565 6 uvcvideo,rts5139,ohci_hcd,ehci_hcd,usbhid
usb_common 954 1 usbcore
lspci:
[declan@buttzmachine ~]$ lspci
00:00.0 Host bridge: Advanced Micro Devices [AMD] Family 12h Processor Root Complex
00:01.0 VGA compatible controller: Advanced Micro Devices [AMD] nee ATI Device 9647
00:01.1 Audio device: Advanced Micro Devices [AMD] nee ATI BeaverCreek HDMI Audio [Radeon HD 6500D and 6400G-6600G series]
00:03.0 PCI bridge: Advanced Micro Devices [AMD] Family 12h Processor Root Port
00:04.0 PCI bridge: Advanced Micro Devices [AMD] Family 12h Processor Root Port
00:06.0 PCI bridge: Advanced Micro Devices [AMD] Family 12h Processor Root Port
00:11.0 SATA controller: Advanced Micro Devices [AMD] Hudson SATA Controller [AHCI mode]
00:12.0 USB controller: Advanced Micro Devices [AMD] Hudson USB OHCI Controller (rev 11)
00:12.2 USB controller: Advanced Micro Devices [AMD] Hudson USB EHCI Controller (rev 11)
00:13.0 USB controller: Advanced Micro Devices [AMD] Hudson USB OHCI Controller (rev 11)
00:13.2 USB controller: Advanced Micro Devices [AMD] Hudson USB EHCI Controller (rev 11)
00:14.0 SMBus: Advanced Micro Devices [AMD] Hudson SMBus Controller (rev 13)
00:14.2 Audio device: Advanced Micro Devices [AMD] Hudson Azalia Controller (rev 01)
00:14.3 ISA bridge: Advanced Micro Devices [AMD] Hudson LPC Bridge (rev 11)
00:14.4 PCI bridge: Advanced Micro Devices [AMD] Hudson PCI Bridge (rev 40)
00:18.0 Host bridge: Advanced Micro Devices [AMD] Family 12h/14h Processor Function 0 (rev 43)
00:18.1 Host bridge: Advanced Micro Devices [AMD] Family 12h/14h Processor Function 1
00:18.2 Host bridge: Advanced Micro Devices [AMD] Family 12h/14h Processor Function 2
00:18.3 Host bridge: Advanced Micro Devices [AMD] Family 12h/14h Processor Function 3
00:18.4 Host bridge: Advanced Micro Devices [AMD] Family 12h/14h Processor Function 4
00:18.5 Host bridge: Advanced Micro Devices [AMD] Family 12h/14h Processor Function 6
00:18.6 Host bridge: Advanced Micro Devices [AMD] Family 12h/14h Processor Function 5
00:18.7 Host bridge: Advanced Micro Devices [AMD] Family 12h/14h Processor Function 7
01:00.0 VGA compatible controller: Advanced Micro Devices [AMD] nee ATI Whistler [AMD Radeon HD 6600M Series]
02:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8101E/RTL8102E PCI Express Fast Ethernet controller (rev 05)
03:00.0 Network controller: Atheros Communications Inc. AR9285 Wireless Network Adapter (PCI-Express) (rev 01)
Additionally, I have tried the thing it suggests here: https://wiki.archlinux.org/index.php/Pm … om_suspend
It didn't work, same thing happens.
Last edited by Declan (2012-08-04 18:59:36)

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2) After the boot screen (The Circle Animation & Windows 8 logo), you will be presented by the lovely & awesome blank screen.
3) Wait for 1 minute so that drivers load into the memory.
4) Press the Power button of your laptop/PC for only a moment (Just Press and release it quickly. Don't hold. We don't want to shut down).
5) This will force the laptop/PC to go into Sleep mode.
6) When the laptop/PC goes in sleep, the laptop fan & other sounds will stop.
7) After 4-5 seconds, press the power button again & release it quickly.
8) Voilllaa!!! The laptop/PC starts & you are presented with the lock screen. Now..... Login! What are you waiting for! :P
This is not the permanent solution. It just lets you start you Laptop/PC.
After updating the BIOS, I strongly suggest that you must download the latest graphics driver for your Computer/Laptop to avoid any further issues.

IOS adhoc displays black screen after launch

Hi,
my iOS application displays black screen after slash screen.nothing happens and couldn't see any proper errors on debug utility.
I can build adhoc using flash builder and it's works fine but problem occurs when I create ipa using dumped config file on command line(ant)
I'm using flex sdk 4.6 and AirSDK 15.0(overladed) .my application includes few native extensions.
mxmlc
mxmlc -load-config app-config.xml src/mobapp.mxml -output myapp.swf
adt
<target name="build-release-adhoc-package-ipa">
    <echo>::building captive-runtime release-adhoc ipa..</echo>
    <exec executable="${FLEX_BIN}/adt" failonerror="true">
        <arg line="-package" />
        <arg line="-target ipa-ad-hoc" />
        <arg line="-storetype pkcs12" />
        <arg line="-keystore ${provision.dir}/release-adhoc.p12" />
        <arg line="-storepass 12345" />
        <arg line="-provisioning-profile ${provision.dir}/release_adhoc.mobileprovision" />
        <arg line="${adhoc.dir}/ios-adhoc.ipa" />
        <arg line="${src}/mobapp-app.xml" />
        <arg line="myapp.swf" />
        <arg line="${icon.dir}/applicationIcon16.png" />
        <arg line="${icon.dir}/applicationIcon32.png" />
        <arg line="${icon.dir}/applicationIcon36.png" />
        <arg line="${icon.dir}/applicationIcon48.png" />
        <arg line="${icon.dir}/applicationIcon57.png" />
        <arg line="${icon.dir}/applicationIcon72.png" />
        <arg line="${icon.dir}/applicationIcon76.png" />
        <arg line="${icon.dir}/applicationIcon114.png" />
        <arg line="${icon.dir}/applicationIcon120.png" />
        <arg line="${icon.dir}/applicationIcon128.png" />
        <arg line="${icon.dir}/applicationIcon152.png" />
        <arg line="${base.dir}/[email protected]" />
        <arg line="-extdir ${src}/ane" />
        <arg line="-platformsdk /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPh oneOS.sdk" />
    </exec>
    </target>
please help.

Hi,
my iOS application displays black screen after slash screen.nothing happens and couldn't see any proper errors on debug utility.
I can build adhoc using flash builder and it's works fine but problem occurs when I create ipa using dumped config file on command line(ant)
I'm using flex sdk 4.6 and AirSDK 15.0(overladed) .my application includes few native extensions.
mxmlc
mxmlc -load-config app-config.xml src/mobapp.mxml -output myapp.swf
adt
<target name="build-release-adhoc-package-ipa">
    <echo>::building captive-runtime release-adhoc ipa..</echo>
    <exec executable="${FLEX_BIN}/adt" failonerror="true">
        <arg line="-package" />
        <arg line="-target ipa-ad-hoc" />
        <arg line="-storetype pkcs12" />
        <arg line="-keystore ${provision.dir}/release-adhoc.p12" />
        <arg line="-storepass 12345" />
        <arg line="-provisioning-profile ${provision.dir}/release_adhoc.mobileprovision" />
        <arg line="${adhoc.dir}/ios-adhoc.ipa" />
        <arg line="${src}/mobapp-app.xml" />
        <arg line="myapp.swf" />
        <arg line="${icon.dir}/applicationIcon16.png" />
        <arg line="${icon.dir}/applicationIcon32.png" />
        <arg line="${icon.dir}/applicationIcon36.png" />
        <arg line="${icon.dir}/applicationIcon48.png" />
        <arg line="${icon.dir}/applicationIcon57.png" />
        <arg line="${icon.dir}/applicationIcon72.png" />
        <arg line="${icon.dir}/applicationIcon76.png" />
        <arg line="${icon.dir}/applicationIcon114.png" />
        <arg line="${icon.dir}/applicationIcon120.png" />
        <arg line="${icon.dir}/applicationIcon128.png" />
        <arg line="${icon.dir}/applicationIcon152.png" />
        <arg line="${base.dir}/[email protected]" />
        <arg line="-extdir ${src}/ane" />
        <arg line="-platformsdk /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPh oneOS.sdk" />
    </exec>
    </target>
please help.

[Solved] Amilo XI 2550 - Black screen after fresh install

Dear archlinux users,
I have been reading the archlinux wiki and forums since I started using arch several years ago. It was always possible to solve the problems I ran into by consulting these webpages, therefore a big thanks to the community for the provided help.
Two weeks ago I installed arch on a Fujitsu Siemens Amilo XI 2550. The first problem I ran into was that booting the live-cd resulted in a black screen and I could not even start with installing arch. This problem was solved with the kernel parameter 'nomodeset'.
The first boot of the freshly installed arch also resulted in a black screen after the GRUB menu which was perfectly displayed. After some searching (here and here and ...) I plugged in an external monitor and it showed the login screen. I then installed KDE because I thaught the problem might not show up with X and KDE running. After the login to KDE I realized that the brightness of the laptop display is nearly black but not totally. It seems as if the brightness is at a very low level, but brightness cannot be controlled with the Fn+F8 or Fn+F9 commands. But I see a OSD that indicates that the controls are used but without effect. So at the moment it is only possible to work on the laptop with another display connected to it.
Maybe of use:
ls /sys/class/backlight/
acpi_video0
radeon_bl0
less /sys/class/backlight/acpi_video0/bl_power
0
less /sys/class/backlight/acpi_video0/actual_brightness
7
less /sys/class/backlight/acpi_video0/brightness
7
less /sys/class/backlight/acpi_video0/max_brightness
7
less /sys/class/backlight/radeon_bl0/bl_power
0
less /sys/class/backlight/radeon_bl0/actual_brightness
255
less /sys/class/backlight/radeon_bl0/brightness
255
less /sys/class/backlight/radeon_bl0/max_brightness
255
dmesg | grep drm
[ 0.736559] [drm] Initialized drm 1.1.0 20060810
[ 0.743608] [drm] radeon kernel modesetting enabled.
[ 0.743678] fb: switching to radeondrmfb from VESA VGA
[ 0.744054] [drm] initializing kernel modesetting (RV630 0x1002:0x9583 0x1734:0x1107).
[ 0.744065] [drm] register mmio base: 0xCFEF0000
[ 0.744067] [drm] register mmio size: 65536
[ 0.744172] [drm] Detected VRAM RAM=256M, BAR=256M
[ 0.744174] [drm] RAM width 128bits DDR
[ 0.744257] [drm] radeon: 256M of VRAM memory ready
[ 0.744259] [drm] radeon: 512M of GTT memory ready.
[ 0.744275] [drm] Loading RV630 Microcode
[ 0.744345] [drm] Internal thermal controller without fan control
[ 0.744386] [drm] radeon: power management initialized
[ 0.744389] [drm] GART: num cpu pages 131072, num gpu pages 131072
[ 0.762830] [drm] PCIE GART of 512M enabled (table at 0x0000000000040000).
[ 0.762873] [drm] Supports vblank timestamp caching Rev 2 (21.10.2013).
[ 0.762874] [drm] Driver supports precise vblank timestamp query.
[ 0.762937] [drm] radeon: irq initialized.
[ 0.794780] [drm] ring test on 0 succeeded in 1 usecs
[ 0.795253] [drm] ib test on ring 0 succeeded in 0 usecs
[ 0.795942] [drm] radeon atom DIG backlight initialized
[ 0.795945] [drm] Radeon Display Connectors
[ 0.795947] [drm] Connector 0:
[ 0.795948] [drm] LVDS-1
[ 0.795950] [drm] DDC: 0xac0 0xac0 0xac4 0xac4 0xac8 0xac8 0xacc 0xacc
[ 0.795951] [drm] Encoders:
[ 0.795952] [drm] LCD1: INTERNAL_LVTM1
[ 0.795953] [drm] Connector 1:
[ 0.795954] [drm] DIN-1
[ 0.795955] [drm] Encoders:
[ 0.795956] [drm] TV1: INTERNAL_KLDSCP_DAC2
[ 0.795957] [drm] Connector 2:
[ 0.795958] [drm] HDMI-A-1
[ 0.795960] [drm] HPD1
[ 0.795961] [drm] DDC: 0x7e50 0x7e50 0x7e54 0x7e54 0x7e58 0x7e58 0x7e5c 0x7e5c
[ 0.795963] [drm] Encoders:
[ 0.795964] [drm] DFP1: INTERNAL_KLDSCP_TMDS1
[ 0.795965] [drm] Connector 3:
[ 0.795966] [drm] VGA-1
[ 0.795968] [drm] DDC: 0x7e40 0x7e40 0x7e44 0x7e44 0x7e48 0x7e48 0x7e4c 0x7e4c
[ 0.795969] [drm] Encoders:
[ 0.795970] [drm] CRT1: INTERNAL_KLDSCP_DAC1
[ 1.278449] [drm] fb mappable at 0xD0141000
[ 1.278451] [drm] vram apper at 0xD0000000
[ 1.278453] [drm] size 9216000
[ 1.278454] [drm] fb depth is 24
[ 1.278455] [drm] pitch is 7680
[ 1.278527] fbcon: radeondrmfb (fb0) is primary device
[ 1.726069] radeon 0000:01:00.0: fb0: radeondrmfb frame buffer device
[ 1.770030] [drm] Initialized radeon 2.39.0 20080528 for 0000:01:00.0 on minor 0
Until now and amongst others I tried the following things.
Using kernel parameters
video.use_native_backlight=1
video.use_native_backlight=0
acpi_osi=linux
acpi_backlight=vendor
and others I just cannot remember.
Masking backlight
systemctl mask systemd-backlight@backlight:acpi_video0.service
systemctl mask systemd-backlight@backlight:radeon_bl0.service
Setting bl_power
echo 1 > /sys/class/backlight/acpi_video0/bl_power
echo 1 > /sys/class/backlight/radeon_bl0/bl_power
Nothing of the above was improving the situation.
Your help on the problem would be highly appreciated.
Best regards
mgs
Last edited by mgs (2014-10-27 10:15:11)

Hello Trilby,
thanks for the reply.
Trilby wrote:If nomodeset worked with the installation medium, why haven't you tried that for the same problem on your installed system?
The kernel parameter 'nomodeset' results in a working display but without X support, due to the fact that with 'nomodeset' there is no KMS support and therefore no X. But nevertheless I tried it and as expected X did not start.
Trilby wrote:Could you also post information about your graphics card and what drivers you've installed.
The graphics card is a Radeon HD 2700 and according to the above dmesg log it is recognized as RV 630. The radeon module is loaded via /etc/mkinitcpio.conf and xf86-video-ati (1:7.5.0-1) is installed.
I hope the provided information is what you asked for, thanks for your help.
Best regards
mgs

My early 2008 Macbook Pro is suffering from black screen after Yosemite update

My early 2008 Macbook Pro is suffering from black screen after Yosemite update. It ran beta 5 great but failed on restart after beta 6 install. There is no cursor but I can hear the HDD spooling up. I have tried booting in safe mode, PRAM reset and SMC reset but nothing works. After the first 5 days of every now and then trying to start it, it started fine. I used the machine all day with no problems, it had rolled back the install and was back on beta 5. I decided to try the update again, the same thing happened and it has stayed black for over a week now. It wont work with a monitor either. Help!

Hello Adam,
I would try instead of installing the beta software, to install the official build of OS X Yosemite from the Mac App Store to see if that gets you passed the no video issue when updating the beta software.
How to install OS X Yosemite on your Mac
http://support.apple.com/en-us/HT6412
Regards,
-Norm G.

GTX670 - Signal lost/black screen after windows loading icon

Hello,
I hope I am posting this in the correct forum area. If not I do apologize.
Here are my specs:
Board: MSI Z97-G45 Gaming
Bios: ?? whatever pre-installed on mobo
VGA: MSI GTX670 OC
PSU: Corsair HX750 750W
Intel Core i7-4790K
MEM: 12 GB Kingston HyperX DDR3 1600 2x 4GB, 2x 2GB sticks
HDD: SSD Kingston 120 GB (Win7), HDD 1 TB WD 7200 RPM (Win7), HDD 1.5 TB WD 7200 RPM (storage)
COOLER: Corsair Hydro Series H60 Water Cooler
OC: no overclocking done by me..default settings
OS: Windows 7 64bit Professional
So to keep this as direct and as short as humanly possible here is my situation.
Had a gtx670 card that I had to send back to MSI under RMA. They sent me what looks like a new gtx670 card (no dust) that I received yesterday (4 Aug). Last night I removed temporary old card (9800gt) and plugged in new 670gtx. Things seemed to be ok, reinstalled driver after card was recognized. Played one round of Battlefield 4 for testing purposes and all seemed good.
Upon exiting the game things went south in a hurry. Moving the mouse cursor around was extremely slow and choppy. Mouse clicks were not recognized. I could not bring up ctrl-alt-del to get to task manager. At this point the cursor turned to spinning circle as if things were happening. However, after 5+ minutes of nothing changing I did a hard boot.
Restarted and after the windows loading screen the signal appeared to be lost to the monitor and I was left with black screen. This was with the SSD. I then attempted to load into the HDD windows OS that I hadn't logged into yet with this card and was greeted with the same issue.
I can load into Safe Mode with no issues. In safe mode I removed all nvidia drivers and was then able to load into windows normally using basic windows vga drivers. The moment I load the Nvidia drivers and restart the computer I then have the issue again. This happens with both drives.
I have reset the video card in the PCI-Ex16 slot and still received the problem. I have tried a different PCI-Ex16 slot and still had the issue. I put the old 9800gt card back in and windows loaded perfectly and without issues on both drives. I put the 670gt in and try to load into normal windows and I lose signal and get black screen after the windows loading screen.
I'm at a loss at the moment. I think it's the drivers, but could it be the card?
Doing some research I've come across some people saying there may be issues with the nvidia HD audio drivers that are installed with the video drivers. Could it be as simple as uninstalling or unchecking that particular driver?

Flashed the BIOS last night to the latest version and attempted to launch windows with the GTX670 card. I still experienced the same issue where as soon as windows finishes it's loading animation (with Nvidia drivers) and it goes to the login screen, the monitors cut out.
At this point I feel like it has to be the card. The moment I install the video drivers and restart, I have the problem of losing the signal/black screen.
What I have done:
1) Completely wiped any/all video related drivers from the computer and started from scratch. No success.
2) Ran Memtestx86 to see if it's a problem with my memory sticks. No problems found.
3) Put the card in a different PCI-Ex16 slot to see if there was a problem with the slot. No success.
4) Flash updated the BIOS on the motherboard to the latest version. No success.
I have a dual boot computer with Windows 7 64-bit installed on an SSD and a HDD. The problem happens on both drives. Yet, the moment I install my old 9800GT the problem disappears and I can login to Windows just fine.
I will be sending the card back today on another RMA.

Photo Booth became black screen after Newpad updated to iOS 7

Photo booth became black screen after Newpad updated to iOS 7

It is not a widespread issue that requires apple to come out with a fix, I have many ipads that were updated and have no issues.
I would suggest you back-up and restore your device, that can repair many issues if the original update was corrupted.

Black screen after pm-suspend

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