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

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Message-Id: <9695C60B-CC91-41B3-87BB-D687E764BE30@gmail.com>
Date:	Sun, 14 Dec 2008 07:35:21 -0800
From:	"Justin P. Mattock" <justinmattock@...il.com>
To:	"Brian J. Murrell" <brian@...erlinx.bc.ca>
Cc:	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: suspend/resume fails on second attempt in LNXVIDEO:00

Is there quite possibly another
Graphics module you can plug-in,
Just to see

justin P. Mattock



On Dec 14, 2008, at 6:08 AM, "Brian J. Murrell"  
<brian@...erlinx.bc.ca> wrote:

> On Sun, 2008-12-14 at 03:16 -0600, Robby Workman wrote:
>> 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
>
> I wish (and was hoping) it was that simple.  The problem is the nature
> of that patch really has no effect on my system because $acpi_flag  
> == 0
> when the sysctl on line 147 is applied.  Presumably this patch has  
> more
> effect if $acpi_flag != 0, by nature of either $QUIRK_S3_BIOS or
> $QUIRK_S3_MODE being == true, neither of which is in my case.  Maybe  
> one
> or both should be.  I dunno.  I'm not sure how these "video quirks"
> work.
>
> b.
>
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