[Nouveau] [Bug 35876] Hard GPU hang on nvidia

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=35876

--- Comment #3 from maximlevitsky at gmail.com 2011-05-20 19:44:38 PDT ---
Yes, it indeed pageflip support.
Putting 'return FALSE' in can_exchange fixes the problem, last time I must have
forgot to 'make install' or something.

However, 'Option "PageFlip" "false"' doesn't help, because even if set, the
condition in can_exchange lets flipping in some cases
(if nouveau_exa_pixmap_is_onscreen() == FALSE).
Not sure why that check is there.

@Alexander Potashev - older kernel you describe just doesn't have pageflipping
code, so sure you don't see it on it.

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