[mythtv-users] Fwd: Re: [mythtv-commits] Ticket #12984: Qt painter crashes frontend in playback of DVB-T radio recordings

[Peter Bennett]

-------- Forwarded Message --------
Subject: 	Re: [mythtv-commits] Ticket #12984: Qt painter crashes
frontend in playback of DVB-T radio recordings
Date: 	Mon, 30 Jan 2017 09:48:56 -0500
From: 	Peter Bennett <cats22 at comcast.net>
Reply-To: 	pbennett at mythtv.org
Organization: 	MythTV
To: 	mythtv-commits at mythtv.org



On 01/30/2017 09:32 AM, MythTV wrote:
> #12984: Qt painter crashes frontend in playback of DVB-T radio recordings
> --------------------------------------+-------------------------
>      Reporter:  J.Pilk@…              |      Owner:
>          Type:  Bug Report - General  |     Status:  new
>      Priority:  minor                 |  Milestone:  unknown
>     Component:  MythTV - General      |    Version:  Master Head
>      Severity:  medium                |   Keywords:
> Ticket locked:  0                     |
> --------------------------------------+-------------------------
>  My main box (SL7.3, Qt 5.6.1  0.28-pre-189-g98b5662) has a longstanding QL
>  driver bug that puts occasional reports starting like this into dmesg.
>  The reports seem more frequent after the recent SL7.3 upgrade.
>
>  {{{
>   WARNING: CPU: 0 PID: 1897 at drivers/gpu/drm/i915/i915_gem.c:4508
>  i915_gem_free_object+0x2e0/0x340 [i915]()
>  [332608.612640] WARN_ON(obj->frontbuffer_bits)
>  }}}
>  I think it also eats memory, so I stop and restart the frontend from time
>  to time.
>
>  The Qt painter is suggested for use in a case like this, but if I start
>  playback of a DVB-T radio recording the frontend screen vanishes and I get
>  continuous reports of
>
>  {{{
>  QOpenGLContext::swapBuffers() called with non-exposed window, behavior is
>  undefined
>  }}}
>
>  This makes it impossible to use the on-screen editor.  It also happens
>  with Qt selected on an nVidia-equipped fc24 Qt 5.6.2 0.29-pre-278-gd1f336c
>  box.
>
> --
> Ticket URL: <https://code.mythtv.org/trac/ticket/12984>
> MythTV <http://www.mythtv.org>
> MythTV Media Center
> _______________________________________________
> mythtv-commits mailing list
> mythtv-commits at mythtv.org
> http://lists.mythtv.org/mailman/listinfo/mythtv-commits

This is normally caused by using an OPENGL playback profile with a QT
theme painter. Check if your playback profile is set to one of the
OPENGL profiles and if so change it to something else (e.g. Normal).


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