[Bug 84252] DRI3 rendering gets stuck waiting for present idle notify event

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=84252

--- Comment #32 from Axel Davy <axel.davy at ens.fr> ---
libxcb seems to suffer some issues, and that's potentially the problem here.

Here a dri3 client implementation with workaround to make threading work:
https://github.com/axeldavy/Xnine/blob/master/dri3.c

As you can see, presenting is done with a separate xcb connection than for
everything else. That prevent a bug when a client is waiting for events in a
thread, and with the same connection you present a pixmap.
Also there is some care to prevent two clients from dispatch present events at
the same time.

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