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

bugzilla-daemon at freedesktop.org bugzilla-daemon at freedesktop.org
Mon Aug 22 08:12:35 PDT 2011


--- Comment #14 from Nicos Gollan <gtdev at spearhead.de> 2011-08-22 08:12:34 PDT ---
(In reply to comment #13)
> Then I think it's just yet another side effect of not having blit support. With
> blit support disabled, make sure VRAM is limited to 256M (the BAR size), as the
> CPU can't access beyond that directly.

No matter the kernel side, the X side of the Radeon driver always says "VRAM
usage limit set to 219499K"; wouldn't that indicate that the X server doesn't
attempt to use memory beyond that anyway?

So my options right now pretty much boil down to hack blitting out of any new
kernel that comes along, add the VRAM limit patch, and hope for the best.

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