Despite APM kernel the PC does not switch off
Support knowledgebase (apm_poweroff)
Applies to
SuSE Linux: Versions since 7.1
Kernel: Version 2.2.18, 2.4.0
Symptom:
Since SuSE Linux 7.1 all kernel include APM Advanced Power
Management support; if you shutdown the computer
it will not be switched off either.
Possibly a 'Segmentation Fault' occurs.
Cause:
Defective or respective a not conformable BIOS regarding to the specifications.
Solution:
By the use of the below mentioned kernel parameter 'real mode
APM BIOS calls' can be activated to turn off the computer:
apm=real-mode-poweroff
In some cases a Bios update is also helpful.
Other options:
You can switch off the APM support completely in the kernel:
apm=off
Debug messages could be turned on using:
apm=debug
If you want to prevent that the PC turns off automatically use:
apm=no-power-off
These parameters can particularly also be used at the boot prompt, e.g.:
boot: linux apm=real-mode-poweroff
and if needed permanently enter the parameters in the append line in
the file /etc/lilo.conf, e.g. :
append="apm=real-mode-poweroff"
Afterwards please execute lilo as user root:
lilo
Kernelsources:
See also:
After shutting down the system it reboots unwantedly
Keywords: APM, POWEROFF, SWITCHOFF, SHUTDOWN, SEGMENTATIONFAULT, KERNELPARAMETER
Categories:
Hardware
SDB-apm_poweroff, Copyright SuSE Linux AG, Nürnberg, Germany
- Version: 11. May 2001
SuSE Linux AG - Last generated: 11. Sep 2002 by ast (sdb_gen 1.40.0)