linux-kernel - Re: suspend/resume fails on second attempt in LNXVIDEO:00

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Message-ID: <20081214031659.4b700a2d@liberty.rlwhome.lan>
Date:	Sun, 14 Dec 2008 03:16:59 -0600
From:	Robby Workman <rw@...orkman.net>
To:	brian@...erlinx.bc.ca
Cc:	linux-kernel@...r.kernel.org
Subject: Re: suspend/resume fails on second attempt in LNXVIDEO:00

In linux.kernel, Brian J. Murrell wrote:
> I'm trying to debug a resume problem on a compaq presario C700 laptop
> on the Ubuntu 2.6.24-22-generic kernel.
>
> SNIPPED
>
> These symptoms mirror a lot of other reports with this machine in that
> the first suspend/resume cycle works but a second attempts
> (apparently) suspends fine but fails on resume.  The backlight on the
> video does not come back and neither does the wireless connection, so
> I'm not positive the problems are purely video related.
>
> How can I proceed from here to further debug what kind of workarounds
> or solutions I might be able to use to get reliable suspend/resume
> functionality?


Assuming Ubuntu uses pm-utils for suspend/hibernate operations, then I
suspect you're needing this patch - the symptoms fit (suspend works
the first time, but fails thereafter), especially if a reboot causes
suspend to work fine again the first time...

http://cgit.freedesktop.org/pm-utils/commit/?id=6c9f2959a36e608e4d1f71230a9eaaa77940c54e

-RW

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