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<b><a class="bz_bug_link
bz_status_NEW "
title="NEW - nouveau graphics freeze when using KDE Plasma 5; PGR engine fault"
href="https://bugs.freedesktop.org/show_bug.cgi?id=92077#c30">Comment # 30</a>
on <a class="bz_bug_link
bz_status_NEW "
title="NEW - nouveau graphics freeze when using KDE Plasma 5; PGR engine fault"
href="https://bugs.freedesktop.org/show_bug.cgi?id=92077">bug 92077</a>
from <span class="vcard"><a class="email" href="mailto:ahippo@yandex.ru" title="Andrey Mazo <ahippo@yandex.ru>"> <span class="fn">Andrey Mazo</span></a>
</span></b>
<pre>(In reply to Ilia Mirkin from <a href="show_bug.cgi?id=92077#c29">comment #29</a>)
<span class="quote">> Can someone see whether sticking
>
> QSG_RENDER_LOOP=basic
>
> into /etc/environment helps anything?</span >
I could try, but looks like it's used by default already:
$ QT_LOGGING_RULES="qt.scenegraph.general=true" plasmawindowed
org.kde.plasma.systemmonitor.net
qt.scenegraph.general: QSG: basic render loop
qt.scenegraph.general: texture atlas dimensions: 1024x512
qt.scenegraph.general: R/G/B/A Buffers: 8 8 8 8
qt.scenegraph.general: Depth Buffer: 24
qt.scenegraph.general: Stencil Buffer: 8
qt.scenegraph.general: Samples: -1
qt.scenegraph.general: GL_VENDOR: nouveau
qt.scenegraph.general: GL_RENDERER: Gallium 0.4 on NVD9
qt.scenegraph.general: GL_VERSION: 3.0 Mesa 12.0.1
...
I don't know for sure, which one was used when I reported the problem
originally (<a href="show_bug.cgi?id=92077#c17">comment 17</a>) or when captured an apitrace (<a href="show_bug.cgi?id=92077#c23">comment 23</a>).
But I would guess, that it was the same based on the following [1]:
"""
The non-threaded render loop is currently used by default ... Linux with Mesa
drivers.
"""
[1]
<a href="http://doc.qt.io/qt-5/qtquick-visualcanvas-scenegraph.html#non-threaded-render-loops-basic-and-windows">http://doc.qt.io/qt-5/qtquick-visualcanvas-scenegraph.html#non-threaded-render-loops-basic-and-windows</a></pre>
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