2012/2/21 Shahar Or <[email protected]>: > 2012/2/15 Shahar Or <[email protected]> >> >> 2012/2/14 Michel Dänzer <[email protected]> >> > >> > On Mon, 2012-02-13 at 13:05 +0200, Shahar Or wrote: >> > > >> > > A Live image of Ubuntu Desktop 12.04 amd64 was also tested. It had the >> > > same stuttering / framedrop. >> > >> > Have you tried a live image of a different distro? >> >> I've tried openSUSE-12.1-GNOME-LiveCD-x86_64.iso. Same thing. Maybe a >> bit worse. Using the 'performance' governor results in no stuttering, >> just like in Ubuntu 11.10 (more on that below). >> >> > > 2012/2/9 Michel Dänzer <[email protected]> >> > > > On Don, 2012-02-09 at 02:03 +0200, Shahar Or wrote: >> > > So I ran sysprof, which is an easy GUI and to my content I only needed >> > > to press a "Start" button :). That's when the magic happened. From the >> > > moment it starts the stuttering goes away. Sweet rendering smoothness >> > > of divine electrical display benefaction ensues! And from the moment I >> > > press "Profile" to stop it, it stops and stuttering returns OMG. And >> > > this is perfectly persistent. What does this mean? >> > >> > Not sure... >> > >> > Which cpufreq governor is being used? Assuming it's one that dynamically >> > changes CPU core frequencies, such as ondemand or conservative, does the >> > problem go away if you switch to one that doesn't, e.g. performance or >> > powersave? >> >> This is fun. >> performance: smoothness goodness >> ondemand: the stuttering as demonstrated in the video >> conservative: stuttering reduced to seemingly about 10% compared to ondemand >> powersave: stuttering increase seemingly to about five times more than >> with ondemand >> >> When using ondemand, raising minimum frequencies results in less >> stuttering. Raising the minimum frequency of all four cores to the >> second step, 1.7GHz, helps a lot and and raising it to 2.5GHz results >> no stuttering. This is under the limited strain of dragging windows >> around in 1280x1024 in compiz, Ubuntu 11.10. > > > Dear Michel, list, > Is there anything else I can do in order to help diagnose this issue, please? > > Here is sysprof: > http://paste.ubuntu.com/851535/ > > Perhaps this is something with cpufreq that's working incorrectly? It > seems unrelated to the GPU. I also get these stutterings at the > virtual terminal.
You might ask on LKML or the cpufreq ML. Alex _______________________________________________ xorg-driver-ati mailing list [email protected] http://lists.x.org/mailman/listinfo/xorg-driver-ati
