<html> <head> <base href="https://bugs.freedesktop.org/" /> </head> <body> <div> <a class="bz_bug_link bz_status_NEW " title="NEW --- - [SNA][HSW] Dragging windows in Gnome3 overview is less smooth than with UXA" href="https://bugs.freedesktop.org/show_bug.cgi?id=68716#c10">Comment # 10</a> on <a class="bz_bug_link bz_status_NEW " title="NEW --- - [SNA][HSW] Dragging windows in Gnome3 overview is less smooth than with UXA" href="https://bugs.freedesktop.org/show_bug.cgi?id=68716">bug 68716</a> from <a class="email" href="mailto:chris@chris-wilson.co.uk" title="Chris Wilson <chris@chris-wilson.co.uk>"> Chris Wilson</a> <pre>The issue appears to be that the overview panel redraw is slow and it misses the 60Hz refresh when double-buffered. UXA does tripling buffering by default, and I just reverted SNA back to double-buffering for the compositor (at the behest of the gnome-shell devs - because it should allow them to do smoother animations!). Option "TripleBuffer" "false" should make UXA behave the same. I'm digging deeper into exactly why this misses, based on this SNB machine and your results, I think it is due to the semaphore interlock following the flip stalls the GPU. Which would also explain the regression with updating mesa. (But that seems an awfully long stall.)</pre> </div> <hr> You are receiving this mail because: <ul> <li>You are the QA Contact for the bug.</li> </ul> </body> </html>