I have Qt configured (in QtUbuntu/QtMir) to use multi-threaded GL
rendering, so we're probably hitting Nouveau's limitations here.
As workaround, I can add code to QtUbuntu/QtMir use single-threaded GL
for Nouveau.
If this is easily reproduced, can you try
initctl set-env --global QSG_RENDER_LOOP=basic
and see if everything is more stable? If so, the workaround should do
the trick
** Changed in: qtmir (Ubuntu)
Status: Invalid => Incomplete
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https://bugs.launchpad.net/bugs/1553328
Title:
Mir/Unity8 crashes/freezes on nouveau (nv50) in pushbuf_kref()
especially with multiple monitors, webbrowser-app or system settings
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