Re: ACPI on Dell Latitude C600

Nate Lawson
2004-01-21T17:46:21Z

On Wed, 21 Jan 2004, Tim Stadelmann wrote:
> With a minimal amount of kernel driver modules loaded, both S1 and S3 almost
> work, with one interesting problem:
>
> The computer displays messages indicating it is going into the appropriate
> sleep state, then switches off most peripherals *except* for the screen and
> backlight. Pressing the power button causes it to resume, but now the
> screen is switched *off* during this process. Changing the virtual console
> to the one used for X11 causes the X server to switch the screen back on and
> the computer appears to be working properly afterwards.

You've probably got an inverted value in your AML for the _PTS, _GTS
methods or some other device method (_S1D). So nothing happens on
suspending and then waking (_WAK), you pass a 0 and it turns off the
display.

-Nate