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Old 08-20-08, 07:59 PM   #1
.:Ratmann:.
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Default Numerous regressions on 6600GT with 177.67

Hi,

With the last beta drivers i'm experiencing a following problems:

* Subpixel antialiased fonts are not accelerated at all, like in pre-100.14.09 drivers. "GtkDrawingArea - Text" test in gtkperf lasts 90s against 4s in previous beta.

* Tons of screen garbage in some opengl apps (for example, quake3 - see screenshots). Also, all games have a considerable fps drop (doom3 - from 45 to 25, quake3 - from 218 to ~100, glxgears - from ~6800 to ~5600) and rendering is always going with heavy stuttering, like it's constant hdd swapping (but it's NOT).

* Playing some (not all) mpegs with mplayer@Xv in windowed (but not fullscreen) mode results in the same artifacts and can even hang the system unless you quit the player.

I have followed all the recomendations from http://www.nvnews.net/vbulletin/showthread.php?t=118088 and speed increase is great, especially scrolling in browsers, but aforementioned problem with subpixelAA effectively kills all these optimizations, so i have to disable antialiasing completely.

I'm not using compiz at all and composite extension is disabled in xorg.conf, because xfce-terminal is slow with it for some reason, even if there is no any composite managers running.
I've tried tweaking all possible options in xorg.conf, no changes.

That's all for now. Hope i wrote detailed enough and this helps you (nVidia) to fix at least some of the bugs in the next driver releases.

Screenshots:
http://img214.imageshack.us/img214/8388/shot0000hy3.jpg
http://img383.imageshack.us/img383/2861/shot0001ss1.jpg
Attached Files
File Type: log nvidia-bug-report.log (143.4 KB, 131 views)
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Old 08-20-08, 10:18 PM   #2
junksiu
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Default Re: Numerous regressions on 6600GT with 177.67

I am running xfce with conposite turn on. Those artifacts are all over the place. Actually they are text. And I am actually doing blind typing now as the text appear to be solid retengular row inside the text box. Same thing happen in the terminal even with compsite effect of.

I am also using a 6600GT which run great until this version .
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Old 08-22-08, 04:10 AM   #3
.:Ratmann:.
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Default Re: Numerous regressions on 6600GT with 177.67

Just tried the new 177.68 beta, no big improvement whatsoever, ugly artifacts in games are still there, but i seem to have found the source of so big fps loss in opengl apps. It's all because of AGP problems:
Code:
$ cat /proc/driver/nvidia/agp/status
Status:          Disabled
Code:
$ grep GART /var/log/Xorg.0.log
(II) NVIDIA(0): Initialized GPU GART.
177.6x drivers ignoring NvAGP=1 setting and work as slow as <=177.13 with NvAGP=0:
Code:
driver version      NvAGP      q3 fps        
  177.13              1         204
  177.13              0         101
                                             
  177.68              1         111
  177.68              0         111
I guess its my AGP version of 6600GT causing problems? What are chances of dropping support for AGP variants of 6xxx cards in the near future?
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Old 08-22-08, 04:40 PM   #4
zander
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Default Re: Numerous regressions on 6600GT with 177.67

Regarding the NvAGP (i.e. builtin AGP GART driver) initialization problem, please see http://www.nvnews.net/vbulletin/show...53&postcount=4.
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Old 08-23-08, 02:43 AM   #5
.:Ratmann:.
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Default Re: Numerous regressions on 6600GT with 177.67

I just wanted to write that the use of kernel agpgart solves all problems with artifacts & low fps (though prevents from launching a second X server because of abnormal (80%) cpu load), but didn't expect that you have worked out the problem so fast and even wrote a patch Thank you very much!
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Old 08-23-08, 10:38 AM   #6
zander
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Default Re: Numerous regressions on 6600GT with 177.67

The corruption problems return if you start X with Option "NvAGP" "0", then?
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Old 08-24-08, 12:35 AM   #7
.:Ratmann:.
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Default Re: Numerous regressions on 6600GT with 177.67

No, they are disappeared completely, even with NvAGP=0.
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