On Monday 15 April 2013 12:08:34 Michael Andersen wrote: > On 15 April 2013 11:56, Rutledge Shawn <shawn.rutle...@digia.com> wrote: > > On 12 Apr 2013, at 11:47 PM, Michael Andersen wrote: > > > I found the root of the problem: there is something fishy with Nvidia's > > > > sync to vblank implementation. If Vsync is turned off, everything works > > ok, > > if it is turned on then all hell breaks loose. I just downloaded and > > installed their latest drivers (310.44) and the problem still exists > > there. > > > > > So, sorry for the noise, it seems Nvidia is to blame. Unfortunately > > > > Vsync was on to fix a different Nvidia bug, so now I have to choose the > > lesser of the two :/ I am reminded of Linus's outburst at Nvidia last > > year.. feeling pretty annoyed right now. > > > > I was having good luck with nouveau for a while, but some recent versions > > started crashing the whole system (quite hard, I couldn't even ssh in and > > tell it to reboot) so I went back to using proprietary drivers for a > > while. > > I have also had problems with nouveau, but I never have time to file bug > reports so I can't complain. > > > At the moment I can run multiple copies of glxgears, get 60 FPS and > > without much CPU usage. I have version 313.26. > > For my card, my version (310.44) is the latest that the nvidia site offers > me (and is newer than all the versions in the Ubuntu repository), what card > do you have and did you opt for beta drivers or something similar? With > sync to VBlank, I get 60FPS with almost no CPU usage until I attempt to > drag windows, then all hell breaks loose. I'll see if I can find a newer > driver and retest.
I get no problems whilst dragging windows here with the 310.x or 313.x series drivers and a GeForce 570 GPU. However, this is on kwin rather than unity. Have you tried other compositing window managers? It could well be something in that layer not interacting nicely. Sean -- Dr Sean Harmer | sean.har...@kdab.com | Senior Software Engineer Klarälvdalens Datakonsult AB, a KDAB Group company Tel. Sweden (HQ) +46-563-540090, USA +1-866-777-KDAB(5322) KDAB - Qt Experts - Platform-independent software solutions _______________________________________________ Interest mailing list Interest@qt-project.org http://lists.qt-project.org/mailman/listinfo/interest
