On 06/29/2011 10:47 PM, Kim Leyendecker wrote:
> Am 29.06.2011 15:19, schrieb Nikos Chantziaras:
>> There are no effects (minimizing, present windows, etc) with compositing
>> turned off, so there can be no comparison.
>>
>> Moving windows around is fast and smooth in both cases. It's
>> compositing animations that have become very slow. When I enable the
>> Show FPS effect, the FPS goes down to 40 when I trigger an animation.
>
> I haven´t read the whole thread yet, but from my recent point of
> knowledge, I would encourage you to have a look at the driver you use
> for your hardware. Check them and please post it here, maybe this helps.
Did so in another post (I'm using a Radeon HD4870 with the open source
drivers.)
I was able to find a tweak that makes kwin usable again though. I had
to create a ~/.drirc file and put this in there:
<driconf>
<device screen="0" driver="dri2">
<application name="Default">
<option name="vblank_mode" value="0" />
</application>
</device>
</driconf>
The "driconf" utility doesn't work; the above has to be created by hand.
Also, the "VSync" option in System Settings must be unchecked. Both of
these things must be performed; if only the .drirc file is created, or
only the VSync checkbox is unchecked, then kwin will keep being slow.
It should be noted that the desktop is still tear-free after doing the
above.
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