[Bug 29333] [r300] dual head output is *very* slow on rotated display

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=29333

--- Comment #2 from Till Matthiesen <entropy at everymail.net> 2010-07-31 14:14:52 PDT ---
(In reply to comment #1)
> The problem is your total desktop (2880 pixels) is larger than that max texture
> size of the GPU (2048 pixels), so it has to fall back to software when doing
> the rotation.  The only way to fix it is to teach X to treat each head as a
> separate buffer rather than using one big buffer for both heads.

Thanks, Alex.

I see, so my bad.

Just as a suggestion, wouldn't it be useful to log this kind of fall back in
Xorg.0.log? I don't know about the maximum texture size an asic has and I guess
lots of others might not as well.

This would at least give a clear hint on what is wrong.

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