Re: ACPI S3 suspend/resume troubleshooting

[Jeff Rizzo <riz%netbsd.org@localhost>]

On 8/26/12 2:22 PM, Grégoire Sutre wrote:
> On 08/26/2012 05:45 AM, riz%NetBSD.org@localhost wrote:
>
> > Leaving out all the trouble that X is likely to bring, I'm just trying
> > from the text console.  When I do:
> >
> > sysctl -w hw.acpi.sleep.state=3
> >
> > I get messages on the console about entering S3, and flushing caches, 
> > and
> > the laptop appears to sleep.  (the power light blinks periodically).
> >
> > However, when I try to resume (by pressing the power button), the power
> > light, caps lock and num lock come on, but the screen (backlight) 
> > never does.
> > I've tried poking various things without success.
>
> If it's only a backlight problem, you might be able to turn
> it back on with:
>
> sysctl -w hw.acpi.acpiout1.brightness=100

I don't think it's only the backlight.  The machine doesn't come back on 
the network, so I assume other issues are happening.

> But if the laptop hangs after resume, you may want to try
> different values for hw.acpi.sleep.vbios (see acpi(4)).

Yeah, I tried 0, 1 and 2.  None result in a resuming laptop. :-/

Thanks,
+j