linux-kernel - Re: [PATCH] uvcvideo: add another YUYV format GUID

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Message-ID: <4B189737.1010100@gmail.com>
Date:	Thu, 03 Dec 2009 20:59:35 -0800
From:	"Justin P. Mattock" <justinmattock@...il.com>
To:	Daniel Ritz <daniel.ritz@....ch>
CC:	Laurent Pinchart <laurent.pinchart@...asonboard.com>,
	Mauro Carvalho Chehab <mchehab@...radead.org>,
	linux-media@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] uvcvideo: add another YUYV format GUID

On 12/03/09 18:05, Daniel Ritz wrote:
> Hi Laurent
>
> On Thu, 2009-12-03 at 21:15 +0100, Laurent Pinchart wrote:
>> Hi Daniel,
>>
>> On Wednesday 02 December 2009 00:48:44 Daniel Ritz wrote:
>>> For some unknown reason, on a MacBookPro5,3 the iSight
>>
>> Could you please send me the output of lsusb -v both with the correct and
>> wrong GUID ?
>
> sure. i attached three files:
>    isight-good.txt, isight-bad.txt, isight-good2.txt
>
> this is three reboots in a row from like 10 minutes ago. the first
> boot into linux was actually rebooting from OSX...first cold boot
> today directly into linux had the right GUID.
>
>>
>>> _sometimes_ report a different video format GUID.
>>
>> Sometimes only ? Now that's weird. Is that completely random ?
>
> yes, sometimes only. it seems to be related to reboots, but i don't
> know what exactly triggers it. rmmod/modprobe doesn't trigger it.
> also, when the wrong GUID is reported, the only way of fixing it is
> to reboot. it really is just the GUID. even when the wrong one is
> reported, the device works just fine.
>
> i started with a plain ubuntu 9.10, kernel 2.6.31 which was supposed
> to fail, so i upgraded to a 2.6.32-rc8 to fix the iSight and some other
> things, just to see it fail again. a reboot later and it worked, some
> time and reboot later it failed again...
>
> rgds
> -daniel
>
>>> This patch add the other (wrong) GUID to the format table, making the iSight
>>> work always w/o other problems.
>>>
>>> What it should report: 32595559-0000-0010-8000-00aa00389b71
>>> What it often reports: 32595559-0000-0010-8000-000000389b71
>>>
>>> Signed-off-by: Daniel Ritz<daniel.ritz@....ch>
>>
>> --
>> Regards,
>>
>> Laurent Pinchart
>

I get weiredness whenever
I shutdown the machine and then boot.
If I boot, then reboot things work.

Justin P. Mattock
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