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<th align="RIGHT" nowrap="nowrap" valign="BASELINE">Subject:
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<td>Re: [mythtv-commits] Ticket #12984: Qt painter crashes
frontend in playback of DVB-T radio recordings</td>
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<th align="RIGHT" nowrap="nowrap" valign="BASELINE">Date: </th>
<td>Mon, 30 Jan 2017 09:48:56 -0500</td>
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<th align="RIGHT" nowrap="nowrap" valign="BASELINE">From: </th>
<td>Peter Bennett <a class="moz-txt-link-rfc2396E" href="mailto:cats22@comcast.net"><cats22@comcast.net></a></td>
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<th align="RIGHT" nowrap="nowrap" valign="BASELINE">Reply-To:
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<td><a class="moz-txt-link-abbreviated" href="mailto:pbennett@mythtv.org">pbennett@mythtv.org</a></td>
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<th align="RIGHT" nowrap="nowrap" valign="BASELINE">Organization:
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<td>MythTV</td>
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<th align="RIGHT" nowrap="nowrap" valign="BASELINE">To: </th>
<td><a class="moz-txt-link-abbreviated" href="mailto:mythtv-commits@mythtv.org">mythtv-commits@mythtv.org</a></td>
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<pre>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: <a class="moz-txt-link-rfc2396E" href="https://code.mythtv.org/trac/ticket/12984"><https://code.mythtv.org/trac/ticket/12984></a>
> MythTV <a class="moz-txt-link-rfc2396E" href="http://www.mythtv.org"><http://www.mythtv.org></a>
> MythTV Media Center
> _______________________________________________
> mythtv-commits mailing list
> <a class="moz-txt-link-abbreviated" href="mailto:mythtv-commits@mythtv.org">mythtv-commits@mythtv.org</a>
> <a class="moz-txt-link-freetext" href="http://lists.mythtv.org/mailman/listinfo/mythtv-commits">http://lists.mythtv.org/mailman/listinfo/mythtv-commits</a>
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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