[mythtv-users] VIDIOCMCAPTURE0: Device or resource busy

David Madsen david.madsen at gmail.com
Sun Aug 24 22:00:09 UTC 2008


> File to patch is libs/libmythtv/NuppelVideoRecorder.cpp
>
>
>>
>>
>>                 Final follow-up
>>
>>                 Problem solved.
>>
>>                 First, this does appear to be a kernel issue with bttv
>>                 and v4l1:
>>                 http://kerneltrap.org/mailarchive/linux-kernel/2008/8/4/2806884
>>
>>                 Using kernel version 2.6.24 works fine.
>>
>>                 In addition, patching mythtv to use v4l2 for bttv
>>                 cards allows it to
>>                 work with kernels >= 2.6.25.  This also reduced my CPU
>>                 time while
>>                 recording from 40% to 25% (Sempron 2400+)
>>
>>
>>                 932c932
>>                 <         if (driver == "cx8800" || driver == "go7007"
>>                 || driver ==
>>                 "em28xx")
>>                 ---
>>                 >         if (driver == "cx8800" || driver == "go7007"
>>                 || driver ==
>>                 "em28xx" || driver == "bttv")
>>
>>                 I have not yet experienced any channel changing errors
>>                 as documented
>>                 here:
>>                 http://www.mythtv.org/pipermail/mythtv-dev/2005-February/031229.html

I filed a bug for this issue a few weeks ago, but the changes haven't
been made in SVN yet.  Feel free to add any relevant info to the bug
report.

http://svn.mythtv.org/trac/ticket/5608

--David Madsen


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