Some additional info: according to "running clutter<https://developer.gnome.org/clutter/1.12/running-clutter.html>" page, other possible values for CLUTTER_VBLANK are "glx" and "dri". I just tested and "glx" also seems to work fine for me (NVidia driver with sync to vblank set to true).
Regards, Andre On Thu, Mar 21, 2013 at 1:10 PM, Andre Costa <blue...@gmail.com> wrote: > Some follow up on this: found on this > thread<https://bugs.launchpad.net/ubuntu/+source/gnome-shell/+bug/1064095/comments/8>that > setting > > CLUTTER_VBLANK=none > > makes it a *whole* lot better. In fact, AFAICS the problem is gone -- even > if NVidia driver is still set to sync to vblank. Other performance problems > which were also very noticeable on GNOME 3.6 (eg. moving windows around) > are also gone. > > Not sure if this is a GNOME or a NVidia bug (or both), will dive deeper > into it later. > > Regards, > > Andre > > > On Wed, Feb 6, 2013 at 9:20 PM, Andre Costa <blue...@gmail.com> wrote: > >> >> On Wed, Feb 6, 2013 at 5:03 PM, Joe Zeff <j...@zeff.us> wrote: >> >>> On 02/06/2013 04:26 AM, Andre Costa wrote: >>> >>>> Quite the contrary: this is a 8-core i7 desktop with a GeForce GT9800. >>>> It should handle any videos just fine ;-) (as it always has done until >>>> F18). There's clearly something wrong, I just don't know exactly what it >>>> is. CPU usage doesn't spike too much while watching videos >>>> >>> >>> Have you tried running top in a terminal while this is going on? It >>> can't hurt to know what process is using most of your CPU time when the >>> videos slow down. >> >> >> Thks Joe, I'll try that. But it doesn't look like it's a high CPU usage >> issue, it looks as if video decoding is buggy. >> >> I just tested getting rid of totem-mozplugin and installing >> gecko-mediaplayer (which uses MPlayer). Firefox is now able to play videos >> just fine, so it does seem to be some issue with Totem (or, more >> specifically, GStreamer?). However, gecko-mediaplayer doesn't get along >> well with Chrome, it simply can't load the plugin. So, either I switch back >> to Firefox or I use it only when I want to watch Quicktime movies. >> >> Damn :-/ >> > >
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