Bug#498673: xserver-xorg-video-intel: 3D acceleration is very slow in absence of heavy load on the CPU
Subhashis Roy wrote:
> When I run `glxgears' I find that on Full screen mode (1280x1024) the
> Frame Per Second (FPS) becomes pretty slow. The display is not smooth and
> FPS is ~18.
> My Video chip is intel Q35.
>
> Given that I used to get ~80 FPS with a slower machine (Intel core 2
> duo 2.4 GHz) than the present (Intel Core 2 duo 3.0 GHz (E8400)) made me
> think something is wrong with the Acceleration mechanism for this chip.
> However, I figured out that when I am running something heavy (e.g.
> `burnP6', which is part of 'cpuburn' to put heavy load on 1 of the CPU) I
> get a much smoother display with FPS of ~180 (factor of 10 increase!).
>
Beware that glxgears is not a benchmark.
Which libgl1-mesa-dri are you using? Can you try the one from experimental ?
Brice
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