nV News Forums

 
 

nV News Forums (http://www.nvnews.net/vbulletin/index.php)
-   NVIDIA Linux (http://www.nvnews.net/vbulletin/forumdisplay.php?f=14)
-   -   Current state of KDE 4 performance (http://www.nvnews.net/vbulletin/showthread.php?t=132328)

aorta 05-02-09 09:48 PM

Current state of KDE 4 performance
 
Hi all,

I've just installed Kubuntu 9.04. I have a Quadro NVS-290 and am using the 180.44 driver package that comes with Ubuntu.

I've checked that the recent performance improvements are enabled, but performance is still very bad. The worst app is konsole, where text output chews up a lot of CPU time. There are noticeable delays when paging through the output of less, or switching tabs, or any kind of text-drawing activity. Enabling AA helps a bit, but I don't want blurred terminal fonts. The rest of KDE is okay if a little sluggish; no stability issues at least.

Is this still the status quo as of KDE 4.2.2? Or should I be expecting better?

I tried the 173 driver which is also in the Ubuntu repository, but performance seems to be just as bad in both versions. Enabling or disabling "Desktop effects" (compiz?) makes no difference. On the same machine, GNOME is pretty smooth. gnome-terminal is faster than konsole but we're talking snails and slugs.

Just want to know what I should be expecting because, in 2D, my old Intel 945 is noticeably better and that's disappointing to say the least.

Thanks!

P.S. What is the GeForce equivalent of a Quadro NVS-290? Is it an 8 series?

Linuxhippy 05-03-09 05:09 AM

Re: Current state of KDE 4 performance
 
A NVS-290 is a GeForce 8500 GT, so a quite weak card. However for 2D this shouldn't matter a lot (if all).

thefirstm 05-03-09 06:30 AM

Re: Current state of KDE 4 performance
 
There is a computer at my school with an 8500GT running Linux, and the 2D performance on it is great. Can you give the 185.18.04 driver in my PPA repository a shot? It might make a difference, because I never tried that particular card with the 180.xx series.

aorta 05-05-09 03:13 AM

Re: Current state of KDE 4 performance
 
Quote:

Originally Posted by thefirstm (Post 1996735)
There is a computer at my school with an 8500GT running Linux, and the 2D performance on it is great. Can you give the 185.18.04 driver in my PPA repository a shot? It might make a difference, because I never tried that particular card with the 180.xx series.

I tried the 185 driver, but there was no noticeable improvement.

Another issue I noticed is that scrolling is sometimes slow initially, then it seems to get cached and is fast. This sometimes happens when dragging large photos in gqview, for example. I've never seen this with any other video card.

Anyway, it's not worth wasting time over. I've switched to an old Radeon X300 and 2D is back to normal, and there's no messing with binary drivers. 3D sucks of course, but I don't need it. I'll probably pick up a cheap Radeon 4350 in anticipation of it being well supported in the future.

artem 05-05-09 09:07 AM

Re: Current state of KDE 4 performance
 
You should run 180.xx.xx drivers in order to get a decent performance with KDE4 KWin effects turned on.

As for Konsole - it's an identified and probably forgotten issue: Konsole from KDE4 is unusable with bitmap or with nonAA TrueType fonts.

clarious 05-09-09 10:15 AM

Re: Current state of KDE 4 performance
 
I also noticed something weird with KWin. My desktop which has a 6600GT runs much much more smoother than my laptop with 8600M GT card , even at the highest powermizer level. My driver version is 185.18.04. Maybe the driver has problem with 8*00 cards?

EDIT: I also has some minor screen corruption with KDE, compositing turned on or not. But that is for another thread I guess.

robotangel 05-10-09 07:59 AM

Re: Current state of KDE 4 performance
 
Well, it's not perfect on my 8600M GT but it's usable, even with desktop effects turned on. A small lag here and there but no bigger issues.

Even though, KDE4 is much more fun on the 7600 GT I have in another PC.

amelyst 05-14-09 04:46 AM

Re: Current state of KDE 4 performance
 
Quote:

Originally Posted by artem (Post 1998084)
You should run 180.xx.xx drivers in order to get a decent performance with KDE4 KWin effects turned on.

As for Konsole - it's an identified and probably forgotten issue: Konsole from KDE4 is unusable with bitmap or with nonAA TrueType fonts.

I have to fully agree with the origanl poster and artem, that there is an unacceptable performance problem once you use non-antialiased fonts in kde 4.2. I am using a 8500GT based card and have the same sluggish response.

As a software developer I prefer non antialiased fonts in all applications. The micorsoft fonts are designed to look good and are readable at typical sizes (8,9,10 pt). Its only the non or badky hinted fonts, that need the 'hack' of antialising to look tolerable.

This seems to be a typical problem, where one side is blaming the other, in this case Qt/KDE vs. nvidia with the result, that this problem won't get addressed any time soon. Even more so, as all the ( for me useless ) fancy 3D effects and antialiased fonts is going to be the main use case.

TheBlackCat 05-15-09 10:27 AM

Re: Current state of KDE 4 performance
 
When using desktop effects with the recent batch of nvidia drivers (180.* or 185.*), should we be using direct or indirect rending?

personman 05-16-09 02:30 PM

Re: Current state of KDE 4 performance
 
Quote:

When using desktop effects with the recent batch of nvidia drivers (180.* or 185.*), should we be using direct or indirect rending?
I would assume direct would be more efficient, but this is really just a guess.

It IS strange that my laptop with a 7000m chip seems to handle compositing as smooth or smoother than my more powerful desktop with an 8800GTS. :/

I think the 185 series helps some by allowing small pixmaps to be placed in vid mem (on 8000 series card, as earlier cards already had this). It did seem to make a difference in firefox and konqueror.

Performance has come a long way though, and I'm grateful, but I think there is more to be done.

Another thing that can speed up compositing somewhat is disabling processor scaling. I've read some interesting articles stating that, while it lowers temperatures, it doesn't lower power usage, and in fact, can increase power usage because it takes longer to run a given instruction at the slower speed, which in turn can delay the computer from entering deeper sleep states. Just thought it was interesting.

In any event, when I run my processor full bore, kde 4 seems more responsive.

-Andy


All times are GMT -5. The time now is 06:30 PM.

Powered by vBulletin® Version 3.7.1
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Copyright 1998 - 2014, nV News.