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

[MythTV]

#12984: Qt painter crashes frontend in playback of DVB-T radio recordings
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     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                     |
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 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.

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Ticket URL: <https://code.mythtv.org/trac/ticket/12984>
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