[clug] ACPI problems

David Collett davico at tpg.com.au
Fri Mar 25 03:42:22 GMT 2005

Hi Michael,
Sometimes (often?) the kernel parameter "acpi_sleep" must be tweaked for
video to resume correctly. See the file "Documentation/power/video.txt"
in the kernel sources for more details. That file also mentions some
userspace programs that some people also require to re-post their video
bios etc. 

Hope that helps,

On Fri, 2005-03-25 at 10:16 +1100, Michael Bennett wrote:
> I'm having trouble getting ACPI to work on my laptop (Dell M60). It is 
> set up to go into sleep mode when the lid is closed. This part works 
> however when it wakes from sleep the display does not wake up.
> I tried the hack that Tridge showed at CLUG of:
> chvt 1
> echo 3 > /proc/acpi/sleep
> sleep 3
> chvt 7
> This changes the display to terminal 1 before sleep and reverts back to 
> terminal 7 after waking so that ACPI plays nicer with X.
> I've also disabled the nvidia binary X drivers, as well as having no X 
> server running at all, and I've removed unused kernel modules with no 
> effect.
> If I do echo 3 > /proc/acpi/sleep from the commandline (VT1) when it 
> wakes up from sleep I can still type and run commands but I can't see 
> anything.
> Does anyone have any suggestions?
> Seeya
> Michael.

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