Intel Pineview & screen rotation = S L O W

[Florian Echtler]

Hello everyone,

I've got a new netbook with an Intel Atom N450 and a Pineview integrated
GFX controller. I'm running Ubuntu 9.10 with Xorg 1.6.4. As it's a
tablet/convertible, I'd like to be able to switch the screen orientation
from time to time. This does work find with xrandr, however, any
rotation except "normal" (i.e., "left","right", and "inverted") is very
slow (e.g, Firefox is barely usable anymore). An entirely non-scientific
test with glxgears gives a framerate of 1190 FPS in normal mode and
around 250 in any rotated mode.

Is this to be expected, or is there a glitch somewhere?

Thanks,
Florian
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