Linked by Thom Holwerda on Sun 27th Dec 2009 14:12 UTC
KDE Since the stream of news is still pretty much dry, I figured I'd throw in something I've been meaning to talk about for a while now, but really didn't dare to: KDE4's performance. Since experiences with KDE4 seem to widely differ between people, it might be a good idea if we, together, can find a common cause among those of us having problems.
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Same Machine as Thom
by TheMonoTone on Wed 30th Dec 2009 16:51 UTC
TheMonoTone
Member since:
2006-01-01

I have almost the exact same hardware as Thom... though with different software. I get excellent performance on almost the same machine. So I have a feeling its one of two things you have Thom.

1) Kubuntu. Its notoriously buggy KDE packages may be the source of your daily crashes. I've run KDE 4.1, 4.2, 4.3 and the various patch releases for *months* without a crash. Yes thats right, months. I'm using Arch Linux.

2) FGLRX. Its crap. Seriously, buggiest driver possible to use. If you want 3D wait a little bit, get an older radeon card that has FOSS 3D already, or get an NVIDIA card. In any case use the ATI driver, xf86-video-ati in archlinux. I use xrender for kwin compositing and it works *perfectly* with better performance then the nvidia card with the nvidia driver I use at work.

Given the two suggestions above I'm sure your issues will disappear if you

* Use the FOSS ati driver
* Use a distro that is known not to have buggy KDE packages. Its so well known bugs from Kubuntu are often simply attributed to Kubuntu instead of KDE itself.

Reply Score: 2

RE: Same Machine as Thom
by lemur2 on Thu 31st Dec 2009 03:49 in reply to "Same Machine as Thom"
lemur2 Member since:
2007-02-17

I have almost the exact same hardware as Thom... though with different software. I get excellent performance on almost the same machine. So I have a feeling its one of two things you have Thom.

1) Kubuntu. Its notoriously buggy KDE packages may be the source of your daily crashes. I've run KDE 4.1, 4.2, 4.3 and the various patch releases for *months* without a crash. Yes thats right, months. I'm using Arch Linux.

2) FGLRX. Its crap. Seriously, buggiest driver possible to use. If you want 3D wait a little bit, get an older radeon card that has FOSS 3D already, or get an NVIDIA card. In any case use the ATI driver, xf86-video-ati in archlinux. I use xrender for kwin compositing and it works *perfectly* with better performance then the nvidia card with the nvidia driver I use at work.

Given the two suggestions above I'm sure your issues will disappear if you

* Use the FOSS ati driver
* Use a distro that is known not to have buggy KDE packages. Its so well known bugs from Kubuntu are often simply attributed to Kubuntu instead of KDE itself.


I would like to endorse this also.

Right now, I am running Arch with KDE 4.3.4 (the default KDE, not KDEmod), which has just moved kernel 2.6.32 to core.

http://www.archlinux.org/news/477/

Because my system has a low-end ATI card (specifically a HD 2400 Pro) I have a composited 3D KDE desktop out of the box (the xf86-video-ati FOSS 3D driver is default with kernel 2.6.32).

It is very stable, and blazingly fast. Hooray for the good guys.

So the only nitpick I would have with your comment is that by using the "ATI driver, xf86-video-ati in archlinux", Thom wouldn't in fact have to wait any longer at all. It is the default right now.

Just install Arch (2009.08 will do), then "pacman -Syu" will update to kernel 2.6.32 and working 3D-capable xf86-video-ati driver.

$ uname -a
Linux nostromo 2.6.32-ARCH #1 SMP PREEMPT Sat Dec 26 09:02:58 CET 2009 x86_64 AMD Athlon(tm) 64 X2 Dual Core Processor 4000+ AuthenticAMD GNU/Linux
$ glxgears
IRQ's not enabled, falling back to busy waits: 2 0
4780 frames in 5.0 seconds = 955.882 FPS
4985 frames in 5.0 seconds = 996.892 FPS
5027 frames in 5.0 seconds = 1005.300 FPS
5005 frames in 5.0 seconds = 1000.826 FPS


(Apparently the IRQs will not be enabled until kernel 2.6.33).

Edited 2009-12-31 03:55 UTC

Reply Parent Score: 2