Hi,
I'm having an issue with animations sometimes stuttering in Gnome Shell and also stuttering animations in KDE.
Hardware is AMD Phenom 965BE at stock clock of 3.4ghz 4 cores, 4GB RAM, ATI IGP 4250 (512mb shared) on GA-880GM-d2h. Linux Ubuntu 13.04 beta 2 running Gnome 3.8.
I noticed that a lot of the time, animations like switching windows from the Overview would be smooth. But some of the times, they would stutter a bit when choosing new window, but not all the time.
So I ran glxgears without vertical sync and found that it would run at 1903 fps and lower but would drop down to 120 fps with the gears window maximized. I noticed after maximizing the window, the gears move smooth but after a couple seconds, the gears stutter once. And then smooth as before. I've noticed this when maximizing that it does stutter once. As in stops for a split second and goes on, but it is fast so that it looks like a stutter.
Then I switched back to the default vsync. It runs excellent at refresh rate with normal window size. After maximizing, it still runs at the same frame rate.Code:glxgearsATTENTION: default value of option vblank_mode overridden by environment. ATTENTION: default value of option vblank_mode overridden by environment. 9519 frames in 5.0 seconds = 1903.720 FPS 9521 frames in 5.0 seconds = 1904.061 FPS 3656 frames in 5.0 seconds = 730.943 FPS 650 frames in 5.0 seconds = 129.774 FPS 648 frames in 5.0 seconds = 129.414 FPS 6733 frames in 5.0 seconds = 1346.474 FPS 4657 frames in 5.0 seconds = 931.127 FPS 648 frames in 5.0 seconds = 129.582 FPS 655 frames in 5.0 seconds = 130.926 FPS 655 frames in 5.0 seconds = 130.751 FPS 657 frames in 5.0 seconds = 131.268 FPS 2036 frames in 5.0 seconds = 407.195 FPS 8530 frames in 5.0 seconds = 1705.916 FPS 9036 frames in 5.0 seconds = 1807.191 FPS 9204 frames in 5.0 seconds = 1840.696 FPS 9082 frames in 5.0 seconds = 1816.361 FPS 9104 frames in 5.0 seconds = 1820.722 FPS 9210 frames in 5.0 seconds = 1841.893 FPS 9233 frames in 5.0 seconds = 1846.515 FPS 9195 frames in 5.0 seconds = 1838.849 FPS
Then I decided to see what would happen when switching between four windows from the overview. It is smooth. But after some time, I switch to a window, and there's stutter in the animation where the window slides to the front of the desktop. And whenever I notice a stutter in the animation, it also shows up in glxgears as a drop in the fps so it falls down to 50, 51, etc. when there's stutter.
I'm not sure what all this means, if anything. But I want to get the stuttering animation issue resolved, because while I love Gnome Shell, I hate having even a slightly jerky experience. It's very annoying over time. My BIOS is up to date (version FF from Gigabyte). Please help me. What do I need to do? Is this stuttering animation issue a bug in the driver? A bug in gnome-shell? And is there a workaround? Thanks.Code:glxgearsRunning synchronized to the vertical refresh. The framerate should be approximately the same as the monitor refresh rate. 301 frames in 5.0 seconds = 60.127 FPS 300 frames in 5.0 seconds = 59.940 FPS 300 frames in 5.0 seconds = 59.939 FPS 300 frames in 5.0 seconds = 59.940 FPS 300 frames in 5.0 seconds = 59.939 FPS 300 frames in 5.0 seconds = 59.941 FPS 300 frames in 5.0 seconds = 59.938 FPS 300 frames in 5.0 seconds = 59.941 FPS 300 frames in 5.0 seconds = 59.938 FPS 300 frames in 5.0 seconds = 59.829 FPS 300 frames in 5.0 seconds = 59.939 FPS 300 frames in 5.0 seconds = 59.940 FPS 278 frames in 5.0 seconds = 55.446 FPS 259 frames in 5.0 seconds = 51.765 FPS 261 frames in 5.0 seconds = 52.132 FPS 269 frames in 5.0 seconds = 53.636 FPS 273 frames in 5.0 seconds = 54.491 FPS 295 frames in 5.0 seconds = 58.779 FPS 300 frames in 5.0 seconds = 59.903 FPS 297 frames in 5.0 seconds = 59.345 FPS 287 frames in 5.0 seconds = 57.353 FPS 274 frames in 5.0 seconds = 54.612 FPS 259 frames in 5.0 seconds = 51.640 FPS 259 frames in 5.0 seconds = 51.795 FPS 270 frames in 5.0 seconds = 53.831 FPS 283 frames in 5.0 seconds = 56.542 FPS 269 frames in 5.0 seconds = 53.764 FPS 284 frames in 5.0 seconds = 56.725 FPS 260 frames in 5.0 seconds = 51.818 FPS 264 frames in 5.0 seconds = 52.428 FPS 267 frames in 5.0 seconds = 53.376 FPS 276 frames in 5.0 seconds = 55.154 FPS 265 frames in 5.0 seconds = 52.955 FPS 278 frames in 5.0 seconds = 55.535 FPS 297 frames in 5.0 seconds = 59.345 FPS 295 frames in 5.0 seconds = 58.731 FPS 292 frames in 5.0 seconds = 58.353 FPS 293 frames in 5.0 seconds = 58.541 FPS 293 frames in 5.0 seconds = 58.539 FPS
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Originally Posted by Temüjin
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