Slackware 64 14.1. I compiled and upgraded Mesa to 10.3.0 and now I have horrible performance. CPU usage sky rockets to %100 and framerates are terrible with GZdoom. Really slow with other opengl applications. It's as if I'm using the LLVM pipe software backend but this doesn't appear true.

'glxinfo | grep direct' shows I have direct rendering on, and 'glxgears -info' shows I'm using nouveau glx:
I'm using nouveau with a Geforce FX 5700. I tried an ATI card with the radeon driver and I also get the same result (100% CPU usage and bad FPS).

I'm guessing I need to recompile certain libraries against Mesa? Or something else I need to recompile?

Help is appreciated!

AFAIK, "GL_RENDERER = Gallium 0.4 ..." means software rendering, whereas you should have something like "GL_RENDERER = Mesa DRI ...". So, you're indeed using the LLVM pipe software backend.

I had a similar problem some times ago every time I was booting with a new external monitor plugged in. The issue is not fixed yet, and I have to unplug the monitor before boot and plug it in after I'm logged in, which is somewhat annoying. So it would be interesting if someone know how to fix that. I guess it probably relates to a wrong detection of the hardware.

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I swapped my 5700 for Nvidia 8400gs. The performance increased greatly! But, I still have %100 CPU usage and performance is still much slower compared to Nvidia's proprietary driver. I'm hoping there are settings for Nouveau to change this. My 5700 should be performing faster than 8400gs in GZdoom but it is much slower with nouveau (like mentioned in first post it's like software rendering). Nouveau also doesn't accept custom modelines and goes by edid; Nvidia's driver doesn't have this problem for me.

Is there a deliberate setting causing such horrible performance with Nouveau? I checked /var/log/Xorg.0.log and it shows direct rendering enabled (both 5700 and 8400gs). I never had this problem when I had my r300 with radeon driver in Slackware 13.37.

I don't know if it will work for you, but I just found this:
https://bbs.archlinux.org/viewtopic.php?pid=1366585
So I added myself to the video group and it fixed the problem.

1 members found this post helpful.

My user is in the video group. I also tried as root but same result. Also, 'glxgears -info' shows gallium software if I have software rendering, but it says "Gallium 0.4 on NV36". Is there two different hardware drivers for nouveau (dri and/or gallium)? My Xorg.0.log shows swrast if I get software rendering, but this is not the case.

Okay I switched to nvidia's proprietary driver and I can confirm I get %100 CPU usage with it too. I guess this is normal. It is really fast in comparison to nouveau however.

Gzdoom gives me about 100-200+FPS in 1280x960 with Nvidia's proprietary driver, but nouveau usually 15-40FPS. I have hardware rendering working with nouveau. Both 8400GS and FX 5700 are slower with nouveau, but 5700 is unusually slower (like software rendering) despite using 'GL_RENDERER = Gallium 0.4 on NV36' (this says software when not hardware on my end).

You should definitely not get 100% CPU usage with your nvidia card, and you should not see 'GL_RENDERER = Gallium'. Maybe it's a mesa bug.

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Is there a settings list for noveau? I can't seem to find one. I want to try and tweak settings so I can at least get playable FPS with GZdoom, and not have Steam complain about outdated Nvidia drivers.

Late update:

I've made totally wrong (and therefore misleading) assumptions about "gallium" meaning software rendering, whereas it was "llvmpipe". I think it's worth mentioning to avoid to add confusion.

Also, in case you haven't solved the problem yet, this might be of interest:

http://www.linuxquestions.org/questi...tu-4175534407/

http://nouveau.freedesktop.org/wiki/