[Bug 40221] NI / Cayman: Frequent pixmap corruption on >=3.0 kernels

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=40221

--- Comment #21 from Nicos Gollan <gtdev at spearhead.de> 2011-10-19 10:02:06 PDT ---
Since right now every on-screen action I do freezes my system for a few
seconds, I might as well post here some more.

*Theory.* the freezes in pre-3.0 and the corruption in post-3.0 are actually
the same bug: some in-memory action takes forever to finish. Before 3.0, the
driver actually does the _correct_ thing and sits it out. The new clipping code
is buggy, ignores whatever state would tell it to wait, and happily "finishes"
about halfway through a (purely in-hardware?) copy/move/blit/memory-management
operation that is still ongoing, leaving the GPU with a bunch of mostly clear,
halfway filled-in, and sometimes corrupt surfaces.

TL;DR: Please fix this, I want to use this system!

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