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Old 01-19-05, 08:47 PM   #1
Stephen Anthony
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Default Slow 2D performance w/ 6600GT and 6629 drivers

The affected areas include selection of items in a Konqueror window (rubber-banding), scrolling of text in a konsole window, and animations of the mouse cursor.

For comparison, I was previously using a GeForce4MX card. It gave excellent 2D performance in the above areas, but only got 2 FPS in Doom3!

I just installed an e-VGA 6600GT and while Doom3 performance jumped to over 60 FPS, the 2D operations have really slowed down.

I'm certain it has to do with the Render acceleration changes in the latest drivers, since (for example) xterm without anti-aliased text still scrolls very fast. The only thing in common with all 3 slowdowns is the Render extension.

Note, I *do* have Render enabled in xorg.conf. Without it, the above operations become even slower.

Relevant info:

e-VGA 6600GT (128 MB RAM)
P4-2.4GHz w/ 1GB RAM
Kernel 2.6.10
Mandrake 10.1

Nothing else has changed. I simply pulled one card and installed another. I wouldn't think a 6600GT would be _slower_ than a Geforce4MX. Maybe the codepath for Render acceleration is slower in 6600GT than GF4MX??
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Old 06-14-05, 12:11 PM   #2
_john_i_
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Default Re: Slow 2D performance w/ 6600GT and 6629 drivers

I'm seeing the exact same thing with my new PNY FX6600GT (AGP Version).

I replaced a Geforce 3 with this one. The 3D performance is great, but the 2D performance is
horrible. My old Geforce 3 puts it to shame on 2D.

I have Render acceleration enabled. I've tried both AGPGART and NvAGP.

Antialiased fonts are SO SLOW now, but were very fast on the geforce 3.

The only other change is I now use DVI output, where I was using SVGA before.

If anyone has any clues as to what it causing this, please let me know. The problem is driving me nuts!

My system:
Athlon 3200+
ASUS N7V8X (nforce 2) motherboard.
1 Gig PC3200+ DDR Ram.
Linux 2.6.11.7
XOrg 6.8.2
Nvidia 7664 drivers


Here's my xorg.conf and Xorg.0.log files.
Attached Files
File Type: txt xorg.conf.txt (7.5 KB, 480 views)
File Type: txt Xorg.0.log.txt (25.5 KB, 283 views)
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Old 06-18-05, 07:52 PM   #3
borisdigital
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Default Re: Slow 2D performance w/ 6600GT and 6629 drivers

hi folks, i got exactly the same problem, since i bought a geforce6-6600GT.
3D is top, 2D is flop (damn slow, like agp 1x while it's reported as 8x).

watching tv and browsing the web now really sucks on my pc, cause it's so horribly slow.
btw, this didin't change by using the newest v7664-drivers, it doesn't seem to matter
if you're using noagp/agpgart/nvagp, if you're using fastwrites/renderaccel/whatever.

Did anyone find out where what problem could be here?
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Old 06-18-05, 07:53 PM   #4
borisdigital
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Default Re: Slow 2D performance w/ 6600GT and 6629 drivers

ups, sorry for posting twice
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Old 06-19-05, 12:00 AM   #5
_john_i_
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Default Re: Slow 2D performance w/ 6600GT and 6629 drivers

The plot thickens for me with this problem.....

I noticed something today..... The problem only occurs for programs using XFT antialiased fonts. If I turn off antialiasing (ugly) it is fast. I DO have render acceleration turned on.

But where it gets wierd is this:

It only happens in KDE applications. (konqueror being the worst, but almost all KDE apps using AA fonts). If I use a non-KDE such as firefox, it is fast, even with antialiased fonts. Gnome apps run fast too. They all use XFT/Render extension to do the fonts, so what is it about KDE that is causing the problem?

It is not a QT problem. Vanilla QT apps not using KDE such as the kernel config it QT designer do not suffer.

I've tried:
Recompiling KDE(3.4.1)/QT. I updated fontconfig. I even put some tracing into the QT code to verify that is sucessfully initialize XFT and Render.
I tried all sorts of stuff to my xorg.conf. Render on/off. NvAGP vs. AGPGART. I turned on/off APIC in kernel. Tried switching from DVI back to SVGA. Tried turning off console framebuffer. All to no avail.

I also entered a KDE bug report since I only notice this in KDE:
http://bugs.kde.org/show_bug.cgi?id=107690
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Old 06-22-05, 08:57 PM   #6
_john_i_
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Default Re: Slow 2D performance w/ 6600GT and 6629 drivers

Still no change with the 7667 drivers. This is a real drag.
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Old 06-23-05, 11:48 AM   #7
borisdigital
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Unhappy Re: Slow 2D performance w/ 6600GT and 6629 drivers

yeah, everythings still slow using v1.0-7667.

This is so annoying
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Old 06-23-05, 12:55 PM   #8
_john_i_
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Default Re: Slow 2D performance w/ 6600GT and 6629 drivers

borisdigital,

Do you notice this only in KDE apps like me? Is firefox still fast compared to konqueror? gnome-terminal faster than konsole, etc?

GTK and gnome apps run jsut as fast as they always did.
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Old 06-23-05, 05:06 PM   #9
lightman
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Default Re: Slow 2D performance w/ 6600GT and 6629 drivers

I just upgraded one of the PCs in the office to FC4 (from RH9), and while at it I upgraded its FX5600 with a brand new 6600 (vanilla, no GT).

The drivers are the latest 76.67 release.

While 3d perf is a whole lot better than with the old card, 2d performance simply sucks... I have a couple of PCs with some old TNT that are way faster.

Oh, and it happens no matter what app I'm using, under gnome and kde, with firefox, OO.org, gnumeric, gvim, gnome-terminal, *everything*. The window resizing is choppy and slow, and you can clearly see the text being redrawed(sp?)...

And yes, I (more than) double checked the xorg.conf, logs, /proc/drivers/nvidia (agpgart, 8x, no fast writes)... And there isn't any problem at all.

I sincerely don't know what to check/do to solve the problem. And the user who's on that PC is threatening my life (not to mention the fact that is about to discourage everyone he knows from buying a 6x00 card)
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Old 06-28-05, 01:23 AM   #10
zaffle
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Default Re: Slow 2D performance w/ 6600GT and 6629 drivers

Has there been any updates on new information on this?
I am experiencing a similar problem.

System: AMB Athlon 1.2GHz
X server: XFree86 4.3
Memory: 512MB
Distro: Debian Unstable

Problem appears in some applications, but is most evident in KDE.

In KMail, What I noted was when scrolling, X server CPU usage goes up to 70% and system load goes up as well.

With other applications running under KDE (such as OpenOffice and Firefox) the XServer CPU usage goes up signficantly, but not enough to slow the updates down significantly.
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Old 06-28-05, 11:08 PM   #11
_john_i_
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Default Re: Slow 2D performance w/ 6600GT and 6629 drivers

No update from me, unfortunately.

I did file a bug report with nvidia today, and I am attaching a copy of my nvidia-bug-report.log to this message if it may be of use to anyone.


Since it appears that this bug is not an isolated occurance, at least 5 of us are experiencing it, lets, try to pool some info together here to see what our systems have in common other than the 6600GT. Maybe this will help us or someone at nvidia narrow down the cause.

I've already posted my xorg.conf and Xorg.0.log files earlier in this thread.

Here are more of my specifics:

Card: PNY FX6600GT (AGP Version) *Are all you guys using AGP or PCIExpress? *
MB: Asus A7N8X nforce2
Processor: Athlon 3200+
Ram: 1 Gig dual channel DDR PC3200
Kernel: 2.6.12-ck2 (also tried 2.6.11, 2.6.10, and 2.4.29 still the same)
Monitor: Dell 2001FP Flat panel (Using DVI-D out on card - card is dual DVI with optional SVGA dongles)
AGP Driver: AGPGART (Tried nvAGP) Using 8x.
X: xorg-6.8.2
KDE Version: 3.4.1
QT Version: 3.3.4
gcc: 3.4.3
glibc: 2.3.4 (With TLS/NPTL)
Distro: Linux from scratch (also tried slackware 10.1 with same results)
Nvidia Driver: 7667
Attached Files
File Type: txt nvidia-bug-report.log.txt (74.4 KB, 369 views)
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Old 06-29-05, 01:29 AM   #12
_john_i_
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Default Re: Slow 2D performance w/ 6600GT and 6629 drivers

Guys, here is some light at the end of the tunnel - even if this is never fixed....

Out of curiosity, mainly, I built the CVS version of the unreleased xGL X server from freedesktop.org: http://www.freedesktop.org/wiki/Software_2gXgl

This is an X server that is rendered entirely using OpenGL. So basically all rendering, even the 2D stuff is rendered with the 3D GPU.

It took a lot of work to get it configured and compiled properly, and I even had to use a debugger to fix a segmentation fault in it, but once I got it running, I was able to start KDE in it. And YES, everything is fast again! Woohoo! Unfortunately, this is not even close to being released yet, and there are many graphical glitches, but it does mean one day we will be able to run X in pure GL.


In the mean time - I want my 2D fixed!
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