[mythtv] Deciphering backtrace of loop/segfault

[Robert McNamara]

On Tue, Apr 6, 2010 at 9:57 AM, Michael T. Dean <mtdean at thirdcontact.com> wrote:
> On 04/06/2010 08:27 AM, Kevin Kuphal wrote:
>>
>> I have a friend who updated to 0.23-release tag from SVN and is
>> experiencing the situation where his frontend segfaults when watching
>> a recording.  I already had him clear out everything myth, distclean,
>> recompile, etc. etc.  He compiled a debug copy of Myth and captured
>> this backtrace.  Under gdb using the instructions on mythtv.org, the
>> frontend doesn't segfault but sits at the "Please wait" screen.   Here
>> is the results:
>>
>> http://pastebin.com/KXuaJGBY
>>
>> Any help would be greatly appreciated.
>>
>
> Kevin,
>
> Though the backtrace doesn't tell me much (perhaps others can see more),
> this sounds a lot like the the known race condition that "inspired"
> http://svn.mythtv.org/trac/changeset/22350 as a workaround.  The real fix is
> much more complex, and (TTBOMK), Mark K. will likely tackle it in the
> libmythui-osd branch in order to allow the UI code and video code to be used
> on the display at the same time.
>
> Does changing the 50ms sleep to some other value change the results?  If
> not, I have another (more invasive) hack of a patch that changes timing more
> significantly and can give you a copy to test as a system-specific
> workaround.
>
> Mike

This backtrace looks like someone has libmyth* junk left over from an
old install.  did you have him rm /usr/lib/libmyth* and/or
/usr/local/lib/libmyth*?