Did a few tests, dialogs with a black/transparent backgrounds are definitely the worst (Terminal password prompt, shut down dialog, set a code or password in System Settings, connect to a hidden wifi network). The dialog can take up to 20s to fully open. Even then, they remain slow, for example when you type your password to unlock the Terminal (30s from the end of the splash screen to a workable terminal).
Other dialogs also perform very poorly, for example the "new VPN connection" form, or the calendar-app's bottom edge (tested with the snap version) in which you can't really type anything. The alt-tab switcher is also very (very) laggy and completely unusable. The pointer only move every 1 or 2 seconds which makes it hard to aim correctly at anything. In all those examples, there is some kind of transparency layer involved. Could it be the cause? As noted in the title, performance is generally slow, so it might also be interesting to see what does work well. For example, tab switching in the browser (bottom-edge style) animates quite nicely once it's opened (though it's a bit slow to open). Moving around in the calendar-app is also quite smooth. I would have liked to test lists as well, but the address-book-app snap won't work and Dekko isn't in the repos (neither deb nor snap)… Let me know if there's any kind of test I can do or log I can provide. And let me know if I do have to file another bug! -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to unity8 in Ubuntu. https://bugs.launchpad.net/bugs/1580792 Title: Unity8 on Intel Atoms performs poorly (falls back to software rendering more than non-Atoms do) Status in Canonical System Image: New Status in unity8 package in Ubuntu: Confirmed Bug description: (problem forked from bug 1549455) Unity8 on Intel Pineview performs very poorly. Frame times appears to be up to 900ms, Qt's renderer thread using 100% CPU. Running unity8 with MESA_DEBUG=1 EGL_LOG_LEVEL=debug reveals a few MESA errors: http://paste.ubuntu.com/16344427/ Quoting @vanvugt "Those Mesa errors "Mesa: User error:" all look like OpenGL features that Unity8 is hitting but mir-demos don't. So those gl calls are also good candidates for explaining poor performance, especially if Mesa is falling back to software rendering for them." Since Qt tends to perform just fine on that hardware in X11, something isn't right. To manage notifications about this bug go to: https://bugs.launchpad.net/canonical-devices-system-image/+bug/1580792/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : email@example.com Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp