Bug 528976 – x11-drivers/xf86-video-nouveau-1.0.11 - OpenGL does not work on NV4E

• Product: Gentoo Linux
• Status: RESOLVED NEEDINFO

[Description Vladimir 2014-11-11 21:24:01 UTC]

After a recent upgrade from x11-drivers/xf86-video-nouveau-1.0.10 to 
x11-drivers/xf86-video-nouveau-1.0.11 OpenGL programs stopped working.
For example, in 'glxgears' the gears do not turn. The same happens to another applications -- the image stands still.

Everyghing works fine after the downgrade to v.1.0.10, but not with 1.0.11.

[Comment 1 Pacho Ramos 2015-01-05 19:06:45 UTC]

Probably emerge --info and some Xorg logs would be useful. Also would be interesting to know if some error is shown when trying to run glxgears for example

[Comment 2 Vladimir 2015-01-22 11:10:58 UTC]

Created attachment 394590 [details]
Xorg.0.log

(In reply to Pacho Ramos from comment #1)
> Probably emerge --info and some Xorg logs would be useful. Also would be
> interesting to know if some error is shown when trying to run glxgears for
> example
After today's kernel upgrade to 3.18.3 and the xf86-video-nouveau-1.0.11, glxgears do show the rotating gears, but the typical FPS value is 60.
With xf86-video-nouveau-1.0.10 it was typically about 750 FPS.

[Comment 3 Pacho Ramos 2015-01-22 12:02:47 UTC]

But, how do games perform on it? glxgears FPS was never an "objective" measure of performance

[Comment 4 Pacho Ramos 2015-01-22 12:05:38 UTC]

(In reply to Vladimir from comment #2)
[...]
> With xf86-video-nouveau-1.0.10 it was typically about 750 FPS.

Also, try to downgrade now with that same kernel the older version to try to allocate the change

[Comment 5 Vladimir 2015-01-22 12:33:49 UTC]

(In reply to Pacho Ramos from comment #3)
> But, how do games perform on it? glxgears FPS was never an "objective"
> measure of performance
I do not have any games installed, so I even do not know what tool to test it with.

(In reply to Pacho Ramos from comment #4)
> (In reply to Vladimir from comment #2)
> [...]
> > With xf86-video-nouveau-1.0.10 it was typically about 750 FPS.
> 
> Also, try to downgrade now with that same kernel the older version to try to
> allocate the change
I have just downgraded back to 1.0.10, and now glxgears shows 750FPS.

[Comment 6 Pacho Ramos 2015-01-22 13:04:44 UTC]

I usually try with etracer (games-action/extreme-tuxracer)

[Comment 7 Pacho Ramos 2015-01-22 13:10:22 UTC]

The FPS 60 rate is a bit explained at:
http://askubuntu.com/questions/285342/why-does-vblank-mode-improve-framerate-drastically-in-benchmarks
http://ttux.net/post/glxgears-vertical-refresh-vblank-mode/

And probably this commit was the one making glxgears to now show that framerate:
http://cgit.freedesktop.org/nouveau/xf86-video-nouveau/commit/?id=f0fa8313714c2a5b16e784b257b5ff79da3a443b

[Comment 8 Vladimir 2015-01-22 15:31:02 UTC]

(In reply to Pacho Ramos from comment #7)
> The FPS 60 rate is a bit explained at:
> http://askubuntu.com/questions/285342/why-does-vblank-mode-improve-framerate-
> drastically-in-benchmarks
> http://ttux.net/post/glxgears-vertical-refresh-vblank-mode/
> 
> And probably this commit was the one making glxgears to now show that
> framerate:
> http://cgit.freedesktop.org/nouveau/xf86-video-nouveau/commit/
> ?id=f0fa8313714c2a5b16e784b257b5ff79da3a443b
Yes! I hav just checked it, and indeed this is the case! My laptop has vertical refresh rate of 60 frames per second. So it is exactly set up for my screen.
So, everything seems to work fine now.
Thank you!