[Bug 95192] [EXA] X server intermittently hangs for short moments with rv710 card

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=95192

--- Comment #4 from Michel Dänzer <michel at daenzer.net> ---
First of all, I consider using glamor a very good workaround. In fact, I'm
planning to try enabling glamor by default on >= R(V)6xx once DRI3 is enabled
by default (which I'm planning to try soon).

If the mouse cursor is frozen as well during the hangs, it indicates that the
Xorg process is hung so badly that it can't even react to SIGIO generated by
the mouse input device (actually I'm not 100% sure that's still true with the
mouse driver; does the mouse cursor also freeze during the hangs using the
evdev driver instead of the mouse driver?). It might be interesting to see a
backtrace of the Xorg process during a freeze.

Does the problem also occur without the kernel parameter vmalloc=384000000? And
without any non-default options in xorg.conf?

P.S. It would probably have been easier to identify the change or at least
component which introduced the problem if it was reported sooner after it
started happening.

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