https://bugs.freedesktop.org/show_bug.cgi?id=39202 --- Comment #36 from Ilija Hadzic <ihadzic@xxxxxxxxxxxxxxxxxxxxxx> 2011-08-18 10:32:41 PDT --- (In reply to comment #34) > (In reply to comment #33) > > I booted into kde 4.7.0 with a 3.1.0-rc2 kernel and then I did: > echo 7 > /sys/module/drm/parameters/debug > and then I launched glxgears (and didn't close it). > Then I did: > dmesg | grep waiting > [ 329.830313] [drm:drm_wait_vblank], waiting on vblank count 19676, crtc 0 > [ 329.834052] [drm:drm_wait_vblank], waiting on vblank count 19677, crtc 0 > [ 329.834068] [drm:drm_wait_vblank], waiting on vblank count 19677, crtc 0 > > ----------------- [SNIP]----------------------------- > > Everything seems to be crtc 0 (and I have only the vga cable connected to the > monitor vga output). > > I have Pageflipping off, SwapBuffersWait off. CRTC0 (routed to the connected connector) is correct when only one cable is connected. Does the frame rate reported by glxgears match your monitor refresh rate ? ... 60 ? If so then this is correct and that *should* be the value reported by KDE as well when you turn on desktop effects. Is it ? (turn SwapBuffersWait and PageFlipping back on). If that's also 60 (exactly 60 and equal to your monitor refresh rate, *not* lower) then your system is behaving as it should and anything you saw differently before was wrong. If it's lower than 60, then the only thing I can think of is that something slows down your system so much that it can't complete whatever it needs to do between two buffer swap requests and is actually missing vblanks. Following that logic, the explanation for 100 you saw in the old kernel would be that it wasn't synchronizing at all and 100 was the top speed it could do in a tight loop without any waiting. That's also consistent with what you said in your next post, that you don't see the "waiting on vblank" messages from the kernel. -- Configure bugmail: https://bugs.freedesktop.org/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are the assignee for the bug. _______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx http://lists.freedesktop.org/mailman/listinfo/dri-devel
