[Bug 12902] VBlank related server hang in indirect rendering mode

[bugzilla-daemon at freedesktop.org]

http://bugs.freedesktop.org/show_bug.cgi?id=12902





--- Comment #12 from Mathieu Bérard <mathieu.berard at crans.org>  2008-02-28 06:44:47 PST ---
(In reply to comment #11)
> [...] as I have already disabled that code in my xf86-video-ati tree.
> Sorry, I forgot to mention that before.
> 

Yes I did that too at one point to do some test after vblank-rework got merged.
But I've dropped that after a while.

> So far it's looking like this is indeed related to the vblank-rework changes
> though - or did you see the problem without them?

When I first reported that bug, it was without vblank-rework (and without
compiz) so at one point yes.
I need to redo some test to be sure how it behave now with and without
vblank-rework and/or compiz.

> but I still don't
> understand how any DRM changes could have an impact on the return value of
> signal_pending()...
> 

Neither do I. And I do not understand ethier why drmWaitVBlank clear the
DRM_VBLANK_RELATIVE flag when retrying after being interrupted by a signal ?


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