I'm at my ropes end with this problem. I've had an outstanding bug with Fedora for about 2 years on this issue. Now with Gnome 3 the problem is unavoidable. I have a PowerEdge 840 running Fedora 15. The current symptoms (only happen in 3d desktop): I'll be working away and everything is fine. Activities menu opens in about 200 ms and the docky app is smooth. After a few hours, usually happens faster when I have rdesktop, thunderbird, vnc sessions open, it slows to a crawl. Activities menu in Gnome 3 takes 5-10 seconds and generally everything is slow. To get my speed back I can usually just close all applications and speed comes back as if I just logged in. Other times I do actually have to log out/in (which resets the X.org). Also resetting gnome shell (ALT-F2 r) doesn't help. I tried KDE and I experience the same slow response times with OpenGL. Switching to Xrender seems to preform much better. (which eliminates it being completely a Gnome 3 issue) I've tried swapping the graphics from NV44A [GeForce 6200] to RV710 [Radeon HD 4350] and same results. I've also tried both opensource and vendor supplied drivers. Same results. I have 8 other computers running Fedora 15 without issue. Oddly enough the GeForce 6200 is running in two of them. Also I used the same kickstart files to load all 8 computers, and reloaded the PowerEdge just in case. It's only this one PowerEdge 840 I'm having a problem with. It has 6G of ram, ram has been thoroughly tested and passes. During the slow time there is no swapping and here's the memory output (currently in the issue while typing this): # free -m total used free shared buffers cached Mem: 5982 4412 1569 0 158 1355 -/+ buffers/cache: 2898 3084 Swap: 10239 23 10216 I have no idea where to go from here. The Gnome 3 folks said to try here.
What is your CPU usage like during this period of unresponsiveness? Can you profile the server (preferibly with a minimal set of clients connected)?
I ended up buying a new computer, couldn't live with the problems. The CPU was at the time was about 10-20% on one core during the slow times. The computer now is running Win7 and running iTunes/Games. Works great under windows. Don't know what the problem was.
Meh /shrug
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