OpenGL fails to detect NVIDIA GTX 980 with Nouveau driver

virtual-image · n00b Joined: 21 Feb 2025 Posts: 6

I noticed an issue when attempting to run the game 'Chaos;Head' through wine. Wine attempted to use wined3d to identify my graphics card, but reported it could not find one based on the OpenGL renderer string present. Chasing the issue, I found the way to identify this information is through glxinfo -B.

Excerpt of the output of glxinfo -B:

eccerr0r · Posted: Sat Feb 22, 2025 1:36 am Post subject:

Not clear from your post: did you have it working with this card before or not?

I think for nvidia-drivers you don't need the in-kernel module, but for nouveau, you need the kernel driver -- do you have this enabled in your kernel?

Do you have your Xorg.0.log posted somewhere?

I was trying to use my failing GTX660 under bother nvidia-drivers and nouveau. There was a day and night difference in speed between the two under wine though using xscreensaver/rss-glx screensavers it wasn't as bad as software rendering. Now that nvidia dropped support for the GTX660 I don't have a choice, but since the card artifacts and crashes the machine, I guess it doesn't really matter ...
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virtual-image · n00b Joined: 21 Feb 2025 Posts: 6

I don't think the card has "worked" on this machine before. It worked on Windows, so it functions, and it gets detected by this machine, and the kernel properly loads nouveau drivers for it; BUT OpenGL fails to detect it, or select it, as the rendering device.

I do have the "Nouveau/NVIDIA" kernel options enabled and built-in. I don't think the issue lies with the kernel, because the nouveau drivers DO load.

Here is my Xorg.1.log (my X11 session stated it pasted its output there):
https://paste.gentoo.zip/9N9K1it8

Unfortunately the X log does not complain about anything particularly wrong.
The worst it spouts is:

virtual-image · n00b Joined: 21 Feb 2025 Posts: 6

eccerr0r · Posted: Sat Feb 22, 2025 3:12 am Post subject:

It wasn't clear whether you had it working, changed something, and stopped working...

Is the Xorg.0.log up to date, was the last session actually on :1 ?

Did you have mesa compiled prior to changing VIDEO_CARDS and thus need to rebuild it?
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virtual-image · n00b Joined: 21 Feb 2025 Posts: 6

I don't think it ever worked.

Xorg.1.log is the most recent log.

I read your post and recompiled mesa: unfortunately, nothing has changed.

virtual-image · n00b Joined: 21 Feb 2025 Posts: 6

Here is also my auto-generated (Xorg -config) xorg.conf file:
https://paste.gentoo.zip/QrYr4W9U

Edit: It also occurred to me, that maybe, OpenGL just needs to be told the right settings. I'm not sure how to do that.

Edit again: I am also not on a laptop.

eccerr0r · Posted: Sat Feb 22, 2025 9:15 am Post subject:

remove your xorg.conf and regenerate Xorg.0.log and report what it says.
It looks like it should be accelerated 3D but something is very wrong here. did you ever install nvidia-drivers (and then unmerged it?)
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virtual-image · n00b Joined: 21 Feb 2025 Posts: 6

Ok, I removed the xorg.conf. I'm not sure if this is a concern, but Xorg always dumps its log into Xorg.1.log.
https://paste.gentoo.zip/Su7tK5ku

Also, yes, I did install nvidia-drivers at a point, and then I did unmerge it.

I believe there shouldn't be anything conflicting in the kernel. Here is my kernel anyways.
https://paste.gentoo.zip/E6ZhODjn

eccerr0r · Posted: Sat Feb 22, 2025 5:22 pm Post subject:

Okay. The fact that you merged nvidia-drivers at one point is probably why you're seeing problems. I recall an eselect module that has something to do with glx or opengl but can't recall what it was to do a switcharoo with the libraries, perhaps someone else can recall the command, and this should fix things.

Another thing to try is re-emerging xorg-server though I'm not sure what order you merged things and ideally portage should have rebuilt things in order... but the library problem is suspect.
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Anon-E-moose · Posted: Sat Feb 22, 2025 6:13 pm Post subject:

You can have nvidia driver and nouveau installed at the same (as long as both are modules), you just can't use them at the same time

From an earlier post it appears you have nouveau built in, change it to module.
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