#10981 NORM 11.3.0: XO-1.5 C5 via camera kernel messages

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#10981: XO-1.5 C5 via camera kernel messages
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           Reporter:  Quozl     |       Owner:  corbet                           
               Type:  defect    |      Status:  new                              
           Priority:  normal    |   Milestone:  11.3.0                           
          Component:  kernel    |     Version:  Development build as of this date
         Resolution:            |    Keywords:                                   
        Next_action:  diagnose  |    Verified:  0                                
Deployment_affected:            |   Blockedby:                                   
           Blocking:            |  
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Old description:

> During runin test on 11.2.0 build os22, over four hours, there are 10724
> messages from the kernel of which most are apparently triggered by the
> camera test.
>
>  * 7304 instances of ''viafb-camera viafb-camera: Funky IRQ 90200022'',
>  * 1865 instances of ''viafb-camera viafb-camera: Funky IRQ 90200020'',
>  * 1481 instances of ''viacam_quick_irq: N callbacks suppressed'', where
> N ranges from 12 to 118, with the most frequent value 39.
>
> The camera test does this:
>
> {{{
> /usr/bin/gst-launch v4l2src ! ffmpegcolorspace ! videoscale ! ximagesink
> }}}
>
> I ask:
>  * should the camera test use another command, such as xvimagesink?
>  * are there any configuration methods to suppress the kernel messages?
>  * are the kernel messages benign?  If yes, this ticket can be closed.

New description:

 During runin test on 11.2.0, over four hours, there are 10724 messages
 from the kernel of which most are apparently triggered by the camera test.

  * 7304 instances of ''viafb-camera viafb-camera: Funky IRQ 90200022'',
  * 1865 instances of ''viafb-camera viafb-camera: Funky IRQ 90200020'',
  * 1481 instances of ''viacam_quick_irq: N callbacks suppressed'', where N
 ranges from 12 to 118, with the most frequent value 39.

 The camera test does this:

 {{{
 /usr/bin/gst-launch v4l2src ! ffmpegcolorspace ! videoscale ! ximagesink
 }}}

 I ask:
  * should the camera test use another command, such as xvimagesink?
  * are there any configuration methods to suppress the kernel messages?
  * are the kernel messages benign?  If yes, this ticket can be closed.

--

Comment(by Quozl):

 Ticket description version and build are inconsistent (now fixed), but
 kern.log was certainly from an XO-1.5.

 Retested with os871 on XO-1.5, using olpc-runin-tests 0.11.8-1 with
 /runin/quick for a five minute pass, no VT switches made, no interaction
 with the laptop, runin logs captured after test completion, the problem is
 reproduced.

-- 
Ticket URL: <http://dev.laptop.org/ticket/10981#comment:2>
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