Bug 860637

Same for me.  I have to reboot my machine if I want normal performance.  I have a high end AMD/ATI FirePro GL card using ATI drivers, so different video hardware/drivers at play here.

The problem occured also when I started X by startx. It was resolved by adding liveuser to video group and log out/log in. Maybe this suspend-resume performance problem can be resolved by this too. I wasn't able to test it yet...

I'm also seeing this problem (with the r600g drivers on a rv620). After a fresh booting, everything is smooth. One suspend, and everything is slow as hell (firefox being a very good example, rendering a single page is slow...). However, after downgrading to the latest 3.5 kernel, it seems to be solved. It seems to be an issue in the 3.6 kernel.

Petr, are you able to reproduce it on latest Fedora 18 or 19?

Ward, this bugreport is against Nouveau driver. Are you able to reproduce it on latest Fedora 18 or 19? If true, please file new bugreport against Radeon driver.

I've just tested that on F19 RC1 live. Gnome effects seems to be ok but glxgears are still hanging a lot after suspend-resume cycle. When I added liveuser to group video as on Fedora 18 live, there was no change this time. The only case when glxgears ran smoothly without any hangs was after a fresh boot. CPU load after fresh boot was around gnome-shell 80% and glxgears 50%. There was nothing else important there. After suspend-resume there was gnome-shell at 80-100%, glxgears 10-60% and X 10-50%. When I run it on an installed F19, the situation is very alike to live system, but there is Xorg process instead of X with similar CPU load.

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How does it work on Fedora 20?

Unfortunately even worse :-( When I run glxgears after suspend-resume, there are much longer hangs, but not only glxgears hangs, but the whole environment. Even mouse cursor hangs, no windows can be switched for ~15 seconds, then it runs for 2 seconds and then comes another hang. Adding myself into video group has no effect at all.

xorg-x11-drv-nouveau.i686 1:1.0.9-2.fc20
xorg-x11-server-Xorg.i686 1.14.4-5.fc20
mesa-libGL.i686 9.2.5-1.20131220.fc20
mesa-libGLU.i686 9.0.0-4.fc20

I've just tested it in Rawhide and I do not observe such behaviour. The whole gnome is very slow due to debug binaries, but the performance before and after suspend-resume is mostly the same and there are no hangs.

xorg-x11-drv-nouveau.i686 1:1.0.9-6.fc21
xorg-x11-server-Xorg.i686 1.14.99.904-1.fc21
mesa-libGL.i686 10.0.1-1.20131220.fc21
mesa-libGLU.i686 9.0.0-4.fc21

Can you provides also kernel versions for both?

Please test F20 with Rawhide nodebug kernel.
https://fedoraproject.org/wiki/RawhideKernelNodebug

The versions are:
kernel-PAE.i686 3.12.6-300.fc20
kernel.i686 3.13.0-0.rc7.git0.2.fc21

In F20 I get ~520 fps before suspend and 0-90 fps after resume with looong hangs. When I use the rawhide kernel in F20 there is no behaviour change.

In rawhide I get ~75 fps before and after suspend-resume with standard kernel and no hangs. When I installed PAE kernel, I get ~570 fps before suspend and the same hangs with 0-100 fps after resume.

So it seems the problem is caused by PAE kernel, I haven't noticed I'm not using it in rawhide before, so thanks for asking for the versions.

Sorry, scratch the last comment. I've just found out that the version for rawhide should be 3.13.0-0-rc3.git5.1.fc21 (with debug). There was wrong default in grub.

I've retested with rc7 nodebug kernel and the hangs are there too, so the PAE kernel is not the cause.

Maybe the problem is it says "The framerate should be approximately the same as the monitor refresh rate." but then it runs frenzy over 500 fps, and maybe something changes in v-sync handling after suspend-resume.

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