** Branch linked: lp:~ci-train-bot/mir/mir-ubuntu-zesty-2369 -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to mir in Ubuntu. https://bugs.launchpad.net/bugs/1388490
Title: Frame rate is artificially low on Diamondville Intel Atom systems due to aggressive power management Status in Mir: Fix Committed Status in mir package in Ubuntu: New Bug description: Running a server and a few clients on an Atom N270 (requires vivid) is very stuttery and apparently limited to around 20 FPS. However this limitation is a bug. Firstly I notice the system is still 70% idle according to top. And if I drag the mouse constantly over a surface or move a window constantly, the rendering (of everything) becomes perfectly smooth ~60 FPS. Also using --compositor-report=log on the Mir server shows the compositor render time even on this very weak machine is only 2.6ms. So we have a scheduling problem and forcing re-compositing via input is working around it. Obviously the clients themselves are not able to wake up the compositor frequently enough to ensure new frames get scheduled. However if I wake up the compositor using demo-shell mouse gestures then all is fast and smooth. This seems to be the same kind of scheduling problem also observed on higher-end systems when the compositor buffer pipeline is reduced --> bug 1377872 To manage notifications about this bug go to: https://bugs.launchpad.net/mir/+bug/1388490/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp
