linux-kernel - Re: T60 not coming out of suspend to RAM

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Message-ID: <20060825110441.GB8538@elf.ucw.cz>
Date:	Fri, 25 Aug 2006 13:04:41 +0200
From:	Pavel Machek <pavel@....cz>
To:	"Michael S. Tsirkin" <mst@...lanox.co.il>
Cc:	linux-pm@...l.org,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: T60 not coming out of suspend to RAM

Hi!

> I'm running Linus' git tree on my thinkpad T60.
> It generally seems to work fine after suspend to disk.
> However, the system does not come out of suspend to ram,
> with screen staying blank. I'm looking for hints for debugging this.
> 
> If I set suspend/resume event tracing, I see this in dmesg
> after reboot:
> 
> dmesg -s 1000000 | grep 'hash matches'
>   hash matches drivers/base/power/resume.c:42
>   hash matches device serio2
> 
> serio2 seems to be the psmouse device:
> ls /sys/bus/serio/drivers/psmouse/
> bind bind_mode description serio0 serio2 unbind
> 
> Does this mean the mouse driver blocks the resume?
> 
> I've rebuilt psmouse as a module, unloaded it before suspend, and now
> I see the same behaviour but after reboot:
> dmesg -s 1000000 | grep 'hash matches'
>   hash matches drivers/base/power/resume.c:42
>   hash matches device i2c-9191
> 
> Which is somewhat weird because
> ls /sys/bus/i2c/devices
> does not list any i2c devices
> 
> I could continue disabling stuff - but I am looking in the
> correct place even? How do you debug resume issues?

Yes, disabling stuff is way to go. Just disable everything, and binary
search from there :-).
								Pavel
-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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