[solved][laptop-mode-tools] hard drive power settings not applied

Question

I've used the laptop-mode-tools now for quite some time. However, recently the power management settings are not applied anymore. Possibly since updating to systemd...
My laptop-mode.conf looks as follows:
CONTROL_HD_POWERMGMT=1
# Power management for HD (hdparm -B values)
BATT_HD_POWERMGMT=254
LM_AC_HD_POWERMGMT=254
NOLM_AC_HD_POWERMGMT=254
However, even after doing a systemctl restart laptop-mode-tools.service I always get
$ sudo hdparm -B /dev/sda
/dev/sda:
APM_level = 96
Setting it manually works:
$ sudo hdparm -B 254 /dev/sda
/dev/sda:
setting Advanced Power Management level to 0xfe (254)
APM_level = 254
$ sudo hdparm -B /dev/sda
/dev/sda:
APM_level = 254
Of course, the settings are lost upon rebooting in this case.
Any idea where the problem could be?
Last edited by rggjan (2012-10-08 12:25:04)

Answer 1

I apologize if it is bad style to answer to a post marked as [solved] but:
Same problem here!
HDParm-settings are not applied on boot by LMT.
laptop-mode.conf:
# Should laptop mode tools control the hard drive power management settings?
# Set to 0 to disable
CONTROL_HD_POWERMGMT="auto"
# Power management for HD (hdparm -B values)
BATT_HD_POWERMGMT=100
LM_AC_HD_POWERMGMT=200
NOLM_AC_HD_POWERMGMT=254
# hdparm -B /dev/sda
/dev/sda:
APM_level = 96
Any ideas or solutions on this so far?
And why is this post marked as 'solved'?
edit:
1.) manual set hdparm-settings survive reboot but not suspend!
2.) no difference between CONTROL_HD_POWERMGMT="auto" or "1"
3.)
# systemctl status laptop-mode
laptop-mode.service - Laptop Mode Tools
Loaded: loaded (/usr/lib/systemd/system/laptop-mode.service; enabled)
Active: active (exited) since Do 2013-01-24 14:05:20 CET; 8min ago
Process: 664 ExecStart=/usr/sbin/laptop_mode init auto (code=exited, status=0/SUCCESS)
4.) pointed out that this seems to be a bug: https://bugs.archlinux.org/task/33262 as systemd does not restore apm values on wake up.
Last edited by renegat (2013-03-09 11:01:42)