I've just installed KDE-4.6.0 after reading that many Kwin effects has been optimized.

The update has been positive, except my favourite Kwin effect: the Wobbly Window.
The movement is choppy and not as smooth as in KDE-4.5.x.

This deterioration is especially visible when the Wobbly Window is set to very elastic (stiffness,drag,move factor = 2,95,13) and when there are many other windows open on the desktop (not minimized in the taskbar). The size of the window also matter: Kcalc is moving smoother than Gwenview.

Turning off "Use VSync" in the Advanced tab of the Desktop Effects configuration improves this situation a little, but hardly noticable especially when there are other windows open on the desktop.

Anyone else have this problem?

try disabling "Blur" effect, does that help?

This could also be caused by the Lanczos filter, which can be blacklisted for your graphics card by following the steps at: http://blog.martin-graesslin.com/blog/2 ... n-effects/

The Blur effect wasn't enabled. Also, enabling it did not feel slower (actually I didn't see a change).

I've also tried to blacklist my GPU both in the Blur and Lanczos section:

Code: Select all

Advanced Micro Devices=Gallium 0.4 on ATI R300:-:2.1 Mesa 7.10
Ati=Gallium 0.4 on ATI R300:-:2.1 Mesa 7.10

The driver I use is called r300 (part of the open source xf86-video-ati drivers). And again I didn't see or feel a change.

I've been using KDE-4.6.0 for almost a week now and many other movements feel choppy, not just the Wobbly window effect, but also the rotation of the Desktop Cube. Moving the window without the Wobbly window is also choppy.

This is not what I'm used to, the movement was smooth with KDE-4.5.x.

It looks like the combination of KDE-4.6.0 and my system (hardware and/or settings) has issues. The issues happen when something big is moving, (moving a window or rotating the desktop). But the effect that happen 'in place' (fading in/out or transparancy) are still smooth, even with big windows.

I've found a workaround. It's far from ideal but it works and hopefully some bugkiller can use this as a hint . By turning on the Show FPS effect, I force kwin to redraw the upper-right corner of the screen many times per second... and suddenly the movement of other effects are much less choppy.

I have got the same issue - with new installed Suse 11.4 - KDE 4.6.0 .

desktop effect too slow .

Better when activating fps - again an KDE -realease with buggy kwin.

Folks this is getting really annoying !

I guess whould be better to stop adding all the time new features and better set the focus to stability.
rrrrrrhh...

On my system this issue was "solved" by adding "MaxFPS=25" in the section "[Compositing]" in the file "~/.kde4/share/config/kwinrc" (sometimes ".kde4" is ".kde").

Change the kwinrc file while not running kwin by logging out of kde or just killing kwin.

Without the MaxFPS line or when MaxFPS is much bigger than 25 all movements (not just wobbly window) is not smooth.

What also helps is adding "export LIBGL_ALWAYS_INDIRECT=1" to your list of environment variables.

Read https://bugs.kde.org/show_bug.cgi?id=264259 for more information/help.