From mboxrd@z Thu Jan 1 00:00:00 1970
From: bugzilla-daemon-CC+yJ3UmIYqDUpFQwHEjaQ@public.gmane.org
Subject: [Bug 46557] nouveau: nv4E 2D acceleration broken on
64-bit kernel; works on 32-bit
Date: Sun, 17 Jun 2012 16:02:34 +0000
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https://bugs.freedesktop.org/show_bug.cgi?id=46557
--- Comment #15 from D. Hugh Redelmeier 2012-06-17 09:02:34 PDT ---
Thinking some more. Some inconclusive evidence that this is not a hardware
bug: 64-bit Ubuntu worked fine on it with 3G of RAM. So to does the MS Windows
Vista. This surely included DMAing into the high 1G by disk I/O, DVD writer
I/O, and video driver I/O.
What's new is nouveau. Perhaps it uses part of the video controller that nv
and Vista do not, part that does defective DMA, but that isn't obvious to me.
(Note: I'm using "DMA" in the computer architecture sense, not the IBM PC clone
sense.)
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