Re: [Motion-user] box crashing: VIDIOC_DQBUF error

[Moses <mo...@ne...>]

Hello,

Just an update, the box has been up for 15 days now! The last change I 
made was to add "v4l2=0" to the bttv options in modprobe, motion 
complained about not running V4L2, but its working just like before.

I've been dealing with these crashes for a long time now, last stable 
box I had was either FC5 or FC6, but needed to upgrade because of new 
hardware/kernel drivers. Crashes seem to strike anywhere from 2-30 days 
uptime, although its usually never over 10 days, so a 15 day uptime is 
very good news. If it makes it passed 30 days I would consider it pretty 
stable, as I think it made it to 30 days only one time before.

I couldn't find much documentation on "v4l2=0", I'm assuming this turns 
off V4L2 and just leaves the V4L1 commands. Hopefully this will fix my 
crashes. I would appreciate any comments.

Regards,
-Moses


On 7/26/2010 10:52 PM, Krzysztof Błaszkowski wrote:
> Hello Moses,
>
> On Mon, 2010-07-26 at 13:43 -0700, Moses wrote:
>    
>> Hello,
>>
>> I've been struggling with my motion box for some time.. latest crashes
>> seem to always involve the following error (with differing /dev/video
>> devices), followed by a hard crash. Anyone have any idea as to where I
>> should look? May this be a known problem?
>>
>> Jul 26 09:25:45 video motion.3.2.12: [2] v4l2_next: VIDIOC_DQBUF:
>> Jul 26 09:25:45 video motion.3.2.12: [2] Video device fatal error -
>> Closing video device
>> Jul 26 09:25:45 video motion.3.2.12: [2] Closing video device /dev/video6
>>
>> Sometimes motion will try to restart and I would get a few more seconds
>> of that in the logs, but most of the time this is the last entry.
>>      
> This issue seems to be kernel related i think. Try to use different one.
> Sometimes older work better because regression happens all the time.
>
> There can be also bug in the driver for video device you use, e.g. it
> may not perform well under oom condition nor cpu(s) intensive load.
>
> all these are just guesses (but possible)
>
> Regards,
>    
>> Regards,
>> -Moses
>>
>>      
>
>