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Old 05-11-07, 04:31 PM   #73
IntuitiveNipple
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Post Re: nVidia driver 1.0-96xx causes glitches, artifacts and crashes on Ubuntu Edgy/Feis

Here's the log-file and two 1024x768 screen captures.
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Views:	189
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ID:	25584  Click image for larger version

Name:	Screenshot-02.jpg
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Size:	93.9 KB
ID:	25585  
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File Type: log nvidia-bug-report.log (100.5 KB, 143 views)
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Old 05-11-07, 04:33 PM   #74
IntuitiveNipple
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Thumbs up Re: nVidia driver 1.0-96xx causes glitches, artifacts and crashes on Ubuntu Edgy/Feis

Do not be confused!

I was saying that, in order to upload the log-file, I needed to be able to see what I was doing, and therefore must wait whilst the PC is rebooted with the open-source driver (nv) - the screen gets far too corrupted to be able to do anything sensible with a web browser using the nvidia driver!

The bug report and screenshots were taken whilst using the nvidia proprietary driver.
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Old 05-11-07, 04:40 PM   #75
netllama
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Default Re: nVidia driver 1.0-96xx causes glitches, artifacts and crashes on Ubuntu Edgy/Feisty

I have a few questions:
0) Does this corruption persist if you're not using the Composite extension in X?
1) Does this problem persist if you set NvAGP to 0 in xorg.conf ?
2) Have you verified that you're using the most recent motherboard BIOS?

thanks,
Lonni
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Old 05-11-07, 05:18 PM   #76
IntuitiveNipple
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Default Re: nVidia driver 1.0-96xx causes glitches, artifacts and crashes on Ubuntu Edgy/Feis

0) I'm not sure what the "composite extension" is you are referring to, can you explain?

1) Not tried changing "NvAGP" in xorg.conf yet - will do shortly

2) Current BIOS version is 1005. I've downloaded the latest (1007) and a beta (1008.001). I'm testing each one in turn.

Once I've tested the different BIOS versions with the default setttings, I'll play with the "NvAGP" setting using the latest (1008.001) BIOS.
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Old 05-11-07, 05:34 PM   #77
netllama
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Default Re: nVidia driver 1.0-96xx causes glitches, artifacts and crashes on Ubuntu Edgy/Feisty

I'm referring to adding the following to your xorg.conf (and restarting X):
Section "Extensions"
Option "Composite" disable"
EndSection
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Old 05-11-07, 05:39 PM   #78
IntuitiveNipple
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Default Re: nVidia driver 1.0-96xx causes glitches, artifacts and crashes on Ubuntu Edgy/Feis

Results:

No difference using BIOS versions 1005, 1007, or 1008.001.

No difference adding xorg.conf Option "NvAGP" "0" with BIOS 1008.001
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Old 05-11-07, 05:49 PM   #79
IntuitiveNipple
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Default Re: nVidia driver 1.0-96xx causes glitches, artifacts and crashes on Ubuntu Edgy/Feis

Results:

Adding xorg.conf Option "Composite" "disable" hasn't fixed it.

However, since adding the "NvAGP" I think the severity of the corruption may have reduced slightly.

It may just be coincidence, but it seems as if the corruption of the window decorations (frame, title-bar, frame-icons) hardly ever occurs now.

The contents of menus still get messed up (lots of alternating dark/light horizontal lines, as if a scroll-buffer is being repainted repeatedly and is off by one vertical pixel), as do tool-bars (missing buttons and text), and tree-lists (when expanding a branch the indented leaves rarely appear).

Do any kind of scrolling in a window and the new contents simply aren't visible. I find that moving the window to another location on the screen (thereby presumably forcing a complete repaint) sorts that out for a second or two.
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Old 05-11-07, 05:53 PM   #80
netllama
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Default Re: nVidia driver 1.0-96xx causes glitches, artifacts and crashes on Ubuntu Edgy/Feisty

If setting NvAGP to 0 appears to reduce the corruption, then it sounds like your motherboard might have an AGP issue, where there's signal degradation. Does the BIOS allow you to reduce the AGP rate?
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Old 05-11-07, 06:24 PM   #81
IntuitiveNipple
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Default Re: nVidia driver 1.0-96xx causes glitches, artifacts and crashes on Ubuntu Edgy/Feis

I checked the AGP options in BIOS. There is no option to alter the rate. However, it worked fine with Ubuntu 6.10, and with Windows XP SP2 so I'm doubting that simply changing the OS and video driver version would bring this degree of corruption on.

I did try changing the BIOS video memory caching from USWC (Uncacheable Speculative Write Combination) to UC (Uncached) and it definitely made things much, much worse. So USWC is a better option.

Everything I'm seeing seems to me to be a symptom of some kind of buffer/cache dirty-bit flag not being updated or honoured at the right time.
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Old 05-11-07, 06:28 PM   #82
IntuitiveNipple
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Default Re: nVidia driver 1.0-96xx causes glitches, artifacts and crashes on Ubuntu Edgy/Feis

Referring back to the "NvAGP" comments, is my understanding correct that the Nvidia AGP won't be used unless the kernel agpgart is disabled first (http://en.wikipedia.org/wiki/NvAGP) ?

I tried using the kernel boot option "agp=off" but according to the logs the agpgart module is still loading.
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Old 05-11-07, 06:44 PM   #83
IntuitiveNipple
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Default Re: nVidia driver 1.0-96xx causes glitches, artifacts and crashes on Ubuntu Edgy/Feis

Is this helpful?

I noticed new entries in kern.log every time an error is reported in Xorg.0.log:
Code:
NVRM: Xid (0002:00): 13, 0000 01014a00 0000004a 00000104 00000003 00000802
NVRM: Xid (0002:00): 13, 0000 01014a00 0000004a 00000104 00000000 00000800
NVRM: Xid (0002:00): 13, 0000 01014a00 0000004a 00000104 00000003 00000802
NVRM: Xid (0002:00): 13, 0000 01014a00 0000004a 00000104 00000000 00000800
NVRM: Xid (0002:00): 13, 0000 01014a00 0000004a 00000104 00000003 00000802
NVRM: Xid (0002:00): 13, 0000 01016100 0000008a 00000104 01f50000 00000002
NVRM: Xid (0002:00): 13, 0000 01016100 0000008a 00000104 00000003 00000002
NVRM: Xid (0002:00): 13, 0000 01016100 0000008a 00000104 00000003 00000002
NVRM: Xid (0002:00): 13, 0000 01016100 0000008a 00000104 97004200 00000002
NVRM: Xid (0002:00): 13, 0000 01016100 0000008a 00000104 97004200 00000002
NVRM: Xid (0002:00): 13, 0000 01016100 0000008a 00000104 00000003 00000002
NVRM: Xid (0002:00): 13, 0000 01016100 0000008a 00000104 00000003 00000002
NVRM: Xid (0002:00): 13, 0000 01016100 0000008a 00000104 00000003 00000002
NVRM: Xid (0002:00): 13, 0000 01016100 0000008a 00000104 00000003 00000002
Each coincides with:
Code:
(EE) NVIDIA(0): Error recovery failed.
(EE) NVIDIA(0):  *** Aborting ***
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Old 05-11-07, 07:05 PM   #84
netllama
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Default Re: nVidia driver 1.0-96xx causes glitches, artifacts and crashes on Ubuntu Edgy/Feisty

All of this output suggests that something was taking alot longer to run than it should, and the driver was trying to recover from that state, and failed. However, its not clear whether this was due to a driver bug, or a problem elsewhere (a kernel/BIOS bug, or hardware problem).
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