[Motmot] Segmentation faults

[John Schneider]

Hey Andrew,

The segmentation fault happens at variable times throughout
acquisition, sometimes several hours into it. I've rebooted,
un/replugged, and set the framebuffer to 5; it segfaulted sometime
last night.
As for why the camera would be closed, I'm at a loss.
Screensavers/power management have all been disabled, no other
programs are open when fview is going.
I seem to be able to reproduce this fairly regularly (unfortunately),
any other troubleshooting steps?

Jon

On Thu, Mar 26, 2009 at 7:23 PM, Andrew Straw <astraw at caltech.edu> wrote:
> John Schneider wrote:
>> I get the same output from the backtrace for all three computers:
>> ...
>> (no debugging symbols found)
>> [New Thread 0xaf6b8b90 (LWP 9591)]
>> [New Thread 0xaeeb7b90 (LWP 9592)]
>> (no debugging symbols found)
>> [New Thread 0xae656b90 (LWP 9593)]
>> (no debugging symbols found)
>> [New Thread 0xade55b90 (LWP 9594)]
>>
>> Program received signal SIGSEGV, Segmentation fault.
>> [Switching to Thread 0xae656b90 (LWP 9593)]
>> 0x00000000 in ?? ()
>> (gdb) bt
>> #0  0x00000000 in ?? ()
>> #1  0xaf78860c in raw1394_loop_iterate () from /usr/lib/libraw1394.so.8
>> #2  0xaf789348 in raw1394_write () from /usr/lib/libraw1394.so.8
>> #3  0xaf7a7ff7 in platform_camera_write () from /usr/lib/libdc1394.so.22
>> #4  0xaf79bdb9 in dc1394_set_control_registers () from /usr/lib/libdc1394.so.22
>> #5  0xaf79727e in dc1394_video_set_transmission ()
>>    from /usr/lib/libdc1394.so.22
>> #6  0xaf930856 in CCdc1394_close () from /usr/lib/libcam_iface_dc1394.so
>> #7  0xaf931522 in delete_CCdc1394 () from /usr/lib/libcam_iface_dc1394.so
>> #8  0xb7bbe0b1 in delete_CamContext () from /usr/lib/libcam_iface_unity.so
>
> Hmm, is this occurring with the same characteristics as the bug you
> wrote about earlier today? If this was happening right at camera
> initialization, I'd say to reduce the number of buffers and see if that
> helps. (Also re-plug the cameras and perhaps even reboot.) In fact, I'd
> still give that a try.
>
> But if this isn't right at the beginning of acquisition, I'm at a loss.
> It looks like the software is in the middle of attempting to close the
> camera on purpose. Any idea why that would be?
>
> -Andrew
>
> --
> Andrew D. Straw, Ph.D.
> California Institute of Technology
> http://www.its.caltech.edu/~astraw/
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