OpenGL Video renderer segfaulting w/ NULL audio

[Roger Martensson <roger.martensson@…>]

Manage to get a system without audio and myth uses NULL as the audio device. Quite correct.

The bad thing it is doing a segmentation fault when watching live tv.

Backtrace will be added.

Hopefully I got the backtrace correct.

[Roger Martensson <roger.martensson@…>]

Backtrace as referenced in 22.2 in documentation.

[Roger Martensson <roger.martensson@…>]

myth log from same backtrace session

[robertm]

Looks like this one is actually in the GL Renderer, reassigning. Apologies if I'm misreading it.

[robertm]

User states that this is being run in Virtualbox w/ GL. Segfault probably shouldn't happen regardless, but may be a factor.

[markk]

The point at which the crash occurs is inside the Qt library and that call is already well protected by some sanity checking - so not much we can do there.

Can you confirm whether this is entirely repeatable and the crash occurs in the same place? If so, you'll probably need to file a bug upstream with Qt.

Otherwise please post some additional backtraces with full logs from 'mythfrontend -v playback'

[Roger Mårtensson <roger.martensson@…>]

Been doing some more tests and think this can be closed as user error. Seems there is problem if the user trying to do the opengl operations isn't the owner of the X display. So, logging in using one user and running mythfrontend as the another user is not working. It works with mplayer but then myth might use more complex opengl.

summary: logged in as user A, mythfrontend running as user B(with xhost +) equals crash in livetv. Running mythfrontend as the logged in user equals no crash.

[robertm]

Thanks for reporting back, Roger.