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Old 07-30-10, 06:20 AM   #1
progger1986
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Default Poor 2D Performance

I have openSuse 11.3 and the NVIDIA 256.35 driver installed.
The 2D performance is very bad. Scrolling in Firefox ix very laggy. I even testet under icewm. So it is not a KDE/Qt problem).
With nouveau all is fine. But i'd like to use the nvidia drivers because it has (atm) the bedder 3D support.
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Old 07-30-10, 06:44 AM   #2
Ulukai
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Default Re: Poor 2D Performance

Which card are you using?

It might be PowerMizer kicking in, lowering your clock speeds and thus poor scrolling performance. But when you're scrolling for a couple of seconds, it should go up again.
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Old 07-30-10, 07:40 AM   #3
progger1986
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Default Re: Poor 2D Performance

I hava a 7300GT.
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Old 07-30-10, 03:01 PM   #4
danix
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Default Re: Poor 2D Performance

Firefox sometimes allocates large pixmaps which exceed the hardware limitations of the GPU. These pixmaps have to be handled by a slow software fallback.
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Old 07-30-10, 04:12 PM   #5
aorta
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Default Re: Poor 2D Performance

Quote:
Originally Posted by danix View Post
Firefox sometimes allocates large pixmaps which exceed the hardware limitations of the GPU. These pixmaps have to be handled by a slow software fallback.
So why is performance so good with the nouveau or old nv driver?

Are they using a special hidden GPU?
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Old 07-30-10, 04:54 PM   #6
mooninite
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Default Re: Poor 2D Performance

Quote:
Originally Posted by danix View Post
Firefox sometimes allocates large pixmaps which exceed the hardware limitations of the GPU. These pixmaps have to be handled by a slow software fallback.
I don't pretend to be an X expert, but to my little programming mind it would make sense to break up a 'too large' piece into pieces the GPU can handle, either in GPU memory or in system memory, and allow the GPU to process it. Most likely how the open source driver gets away with it.

Of course that would allow older cards to continue to work without requiring someone to spend money on a new card.
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Old 07-31-10, 03:30 AM   #7
progger1986
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Default Re: Poor 2D Performance

It is nopt just Firefox. The whole KDE4 Desktop is laggy with nvidia too.
The nouveau driver provides a much bedder desktop performance.

As far as i remember tha nvidia driver was faster in that cases.
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Old 07-31-10, 12:13 PM   #8
mick232
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Default Re: Poor 2D Performance

Same here.

256.* drivers render the desktop almost unusably slow (AGAIN) on my GF 8200.

Nouveau works much faster but has some other issues (lock-ups, sometimes artefacts).

Older drivers aren't compatible with xorg 1.9.
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Old 07-31-10, 04:38 PM   #9
konst
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Default Re: Poor 2D Performance

Quote:
Originally Posted by progger1986 View Post
It is nopt just Firefox. The whole KDE4 Desktop is laggy with nvidia too.
The nouveau driver provides a much bedder desktop performance.

As far as i remember tha nvidia driver was faster in that cases.
You're right. The whole KDE4 experience under Nvidia drivers is literally torture. Slow and buggy. However for me the nouveau drivers can't handle dual-link DVI well yet.
I had to use the Nvidia drivers to initialize the card into dual-link mode and the switch the the nouveau drivers. The screen would get corrupted after a while.

Switching to Radeon HD 5850 soon. Don't know how they will behave under KDE4 but since they're open source people can work on them and fix the problems quickly.
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Old 07-31-10, 05:54 PM   #10
Licaon
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Default Re: Poor 2D Performance

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Originally Posted by konst View Post
You're right. The whole KDE4 experience under Nvidia drivers is literally torture. Slow and buggy.
ummm... on your Linux maybe

Quote:
Originally Posted by konst View Post
Switching to Radeon HD 5850 soon. Don't know how they will behave under KDE4 but since they're open source people can work on them and fix the problems quickly.
open-source for 2D only, IIRC
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Old 07-31-10, 08:05 PM   #11
konst
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Default Re: Poor 2D Performance

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ummm... on your Linux maybe

open-source for 2D only, IIRC
Open source for 2d AND 3d in the ATI open source drivers.
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Old 07-31-10, 08:16 PM   #12
Licaon
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Default Re: Poor 2D Performance

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Open source for 2d AND 3d in the ATI open source drivers.
For HD5xxx series? Maybe in a year or so.
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