possible progress on XO-1 camera issues

[Tomeu Vizoso]

On Wed, Dec 16, 2009 at 17:36, César D. Rodas <crodas at paraguayeduca.org> wrote:
> Hi,
>
> The problem with the camera seems to be the xf86-video-geode package.
> The cafe_ccic module is loaded automatically. Cheese and recordactivity
> crashed right before show any picture. Then I tested remotely with ssh
> -X and it worked for olpc and root user and it works.

Great idea!

Would be very useful to get a backtrace with symbols of the crash. For that:

- install gdb
- run gdb cheese from the terminal activity
- install needed symbols with the yum command printed by gdb
- type 'run'
- make it crash
- type 'bt full'
- copy the output and attach it to a trac ticket

You may need to add some swap on a sd card.

If I can be of help, will be in #sugar for a while now.

Cheers,

Tomeu

> This test was done with:
>
>      * XO-1 kernel: 2.6.31_xo1-20091214.1334.1.olpc.49c30d0
>      * os10
>
> Even if it works remotely, there are a lots of warning messages on
> the /var/log/messages:
>
> Dec 16 19:09:35 xo-37-a0-b9 kernel: [ 1218.250879] cafe1000-ccic
> 0000:00:0c.2: Frame overrun on 1, frames lost
> Dec 16 19:09:36 xo-37-a0-b9 kernel: [ 1218.284198] cafe1000-ccic
> 0000:00:0c.2: Frame overrun on 2, frames lost
> Dec 16 19:09:36 xo-37-a0-b9 kernel: [ 1218.317524] cafe1000-ccic
> 0000:00:0c.2: Frame overrun on 0, frames lost
> Dec 16 19:09:36 xo-37-a0-b9 kernel: [ 1218.350843] cafe1000-ccic
> 0000:00:0c.2: Frame overrun on 1, frames lost
> Dec 16 19:09:36 xo-37-a0-b9 kernel: [ 1218.384170] cafe1000-ccic
> 0000:00:0c.2: Frame overrun on 2, frames lost
> Dec 16 19:09:36 xo-37-a0-b9 kernel: [ 1218.417498] cafe1000-ccic
> 0000:00:0c.2: Frame overrun on 0, frames lost
> Dec 16 19:09:36 xo-37-a0-b9 kernel: [ 1218.450817] cafe1000-ccic
> 0000:00:0c.2: Frame overrun on 1, frames lost
> Dec 16 19:09:36 xo-37-a0-b9 kernel: [ 1218.484134] cafe1000-ccic
> 0000:00:0c.2: Frame overrun on 2, frames lost
> Dec 16 19:09:36 xo-37-a0-b9 kernel: [ 1218.517459] cafe1000-ccic
> 0000:00:0c.2: Frame overrun on 0, frames lost
> Dec 16 19:09:41 xo-37-a0-b9 kernel: [ 1223.282572] __ratelimit: 142
> callbacks suppressed
> Dec 16 19:09:41 xo-37-a0-b9 kernel: [ 1223.282599] cafe1000-ccic
> 0000:00:0c.2: Frame overrun on 2, frames lost
> Dec 16 19:09:41 xo-37-a0-b9 kernel: [ 1223.315900] cafe1000-ccic
> 0000:00:0c.2: Frame overrun on 0, frames lost
> Dec 16 19:09:41 xo-37-a0-b9 kernel: [ 1223.349218] cafe1000-ccic
> 0000:00:0c.2: Frame overrun on 1, frames lost
> Dec 16 19:09:41 xo-37-a0-b9 kernel: [ 1223.382540] cafe1000-ccic
> 0000:00:0c.2: Frame overrun on 2, frames lost
> Dec 16 19:09:41 xo-37-a0-b9 kernel: [ 1223.415857] cafe1000-ccic
> 0000:00:0c.2: Frame overrun on 0, frames lost
> Dec 16 19:09:41 xo-37-a0-b9 kernel: [ 1223.449178] cafe1000-ccic
> 0000:00:0c.2: Frame overrun on 1, frames lost
> Dec 16 19:09:41 xo-37-a0-b9 kernel: [ 1223.480217] cafe1000-ccic
> 0000:00:0c.2: Frame overrun on 2, frames lost
> Dec 16 19:09:41 xo-37-a0-b9 kernel: [ 1223.510492] cafe1000-ccic
> 0000:00:0c.2: Frame overrun on 0, frames lost
> Dec 16 19:09:41 xo-37-a0-b9 kernel: [ 1223.549157] cafe1000-ccic
> 0000:00:0c.2: Frame overrun on 1, frames lost
> Dec 16 19:09:41 xo-37-a0-b9 kernel: [ 1223.582476] cafe1000-ccic
> 0000:00:0c.2: Frame overrun on 2, frames lost
>
>
> Regards,
>
> On Sat, 2009-12-12 at 20:16 +0000, Daniel Drake wrote:
>> Hi,
>>
>> Jon Corbet's been working on the XO-1.5 camera driver for us, and
> while
>> doing so he found a V4L2 bug which is probably one of the reasons that
>> we're having problems with XO-1 camera on all post-8.2 builds.
>>
>> The workaround is to build the sensor driver into the kernel, and the
>> camera driver as a module.
>>
>> I've made the equivalent change for the kernel that has been built
> here:
>>
>>
> http://xs-dev.laptop.org/~dsd/repos/f11-xo1/kernel-2.6.31_xo1-20091211.1834.1.olpc.813348c.i586.rpm
>>
>> Untested, just wanted to get the word out.
>>
>> Note that you may have to load the camera driver (cafe_ccic) manually,
>> if it doesn't automatically get loaded.
>>
>> Word is going round that on a SoaS build for XO (which uses something
>> close to OLPC's 2.6.30 kernel, I think), someone recently managed to
>> capture a photo from the command line.
>>
>> If someone is up for a small task, it would be good to start changing
>> these "words going round" to some actual solid information. Anyone
> want
>> to head up these efforts and to start
>> http://wiki.laptop.org/go/Reviving_XO1_camera ?
>> At the very least it would be nice to have some solid documentation on
>> where the problem is (and isn't). Is it in ov7670, cafe_ccic, v4l2,
>> gstreamer, xf86-video-geode, or..? How can you tell? Does the above
>> kernel help? What's the exact command you can use on F12 SoasXO to
> take
>> a photo? What's the corresponding error if you do that on F11? etc.
>>
>> Daniel
>>
>>
>> _______________________________________________
>> Devel mailing list
>> Devel at lists.laptop.org
>> http://lists.laptop.org/listinfo/devel
>>
>
>
> _______________________________________________
> Devel mailing list
> Devel at lists.laptop.org
> http://lists.laptop.org/listinfo/devel
>



-- 
«Sugar Labs is anyone who participates in improving and using Sugar.
What Sugar Labs does is determined by the participants.» - David
Farning