Re: keyboard dies during failed suspend attempt

[Pierre Ossman]

Dmitry Torokhov wrote:
> On Thursday 03 November 2005 03:54, Pierre Ossman wrote:
>   
> > I discovered a problem with my laptop keyboard when the machine failed 
> > to suspend. Pavel Machek pointed me in your direction for guidance. :)
> >
> > The original issue (swsusp failing) is in this thread:
> >
> > http://marc.theaimsgroup.com/?t=113093802700002&r=1&w=2
> >
> > The side issue is that the keyboard goes completely dead when the 
> > suspend fails like this. Not even hardware buttons that control the 
> > intensity of the TFT backlight work.
> >
> >     
>
> Are these controlled by ACPI?
>
>   

Haven't the slightest. There is nothing to control the backlight in 
/proc/acpi at least (all brightness say '<not supported>').

> > The problem doesn't happen every time, but it seems to be often enough 
> > to do some decent testing.
> >
> > The problem seems to have appeared after 2.6.14 was released. Since the 
> >   problem is intermittent I can't be 100% sure of this, but it's fairly 
> > likely since none of the tests before 2.6.14 failed.
> >
> >     
>
> It feels like device_resume is not called somewhere when swsusp fails.
>
> Could you try activating debug mode for i8042:
>
> 	echo 1 > /sys/modules/i8042/parameters/debug
>
> ...and then making it fail. Then we'll see if i8042 resume methods are
> called and whether they succeed.
>
>   

I've been suspending the machine all day now and I have yet to get it to 
fail. There must have been something different yesterday but I can't 
figure out what... I'll do some more testing during the weekend and see 
if I can provoke it again. Otherwise I suppose we can write it off as 
something temporary.

Rgds
Pierre

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