[Bug 169615] kde4 GUI very unresponsive and slow (scrolling, resizing) with "ATI Radeon VE"

[Sebastian Voitzsch]

https://bugs.kde.org/show_bug.cgi?id=169615


Sebastian Voitzsch <sebastian.voitzsch at web.de> changed:

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                 CC|                            |sebastian.voitzsch at web.de




--- Comment #17 from Sebastian Voitzsch <sebastian voitzsch web de>  2009-08-10 18:12:37 ---
I have the same issues with an Nvidia 8200 based computer (closed-source
driver, compositing and effects enabled) as well as with an IBM T42 (ATI Radeon
7500).

To me, it seems kwin makes most of the problems. Everything lags, the system
feels as if it's constantly waiting for something before acting on my commands.
When clicking the K menu, it takes about 1s before it will open (the systems
have 2Gig ram each, it should appear instantly!). Even with repeated actions,
it's a little better, but not as snappy as KDE3 was before. Changing to compiz
makes the system much faster and snappier. However, compiz doesn't run 100%
stable now, and some laggines seems tied to KDE apps. I played around with a
Gnome desktop especially on the older thinkpad which was quite unusable with
effects under KDE - with Gnome, it runs smooth too!

In addition, I can make huge cpu loads doing nearly nothing. Klicking on a
window title bar WITHOUT actually moving the window makes kwin immediately
eating up one core! The desktop effects are smooth, that's not the point. Even
wobbly windows and transparency run without any delays.

After all, I'm kind of tired hearing "let's wait for KDE xxx to come out". I
think there are some really dramatic performance problems and they should be
addressed. If not, it would be better to go back to the KDE 3 architecture. The
new features are nice, but most of them are kind of eye candy. They are nice,
but a snappy system on a >=2GHz system with 3D capable gfx hardware is even
more essential. First, they said it's about NVidia closed-source driver. Now
it's due to Qt....

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