Interestingly, bug 1517133 shows this issue existed before the switch to libinput. So the bug has remained consistent with both android-input and libinput backends in Mir. And the switch to libinput made no visible difference.
I have a theory that the relative motion data Unity8 is receiving might be incomplete. Because it's a nested server and subject to input resampling, meaning it will only get input events at 59Hz. It's possible we don't have sufficient logic to merge the relative motion data accurately before it's delivered to Unity8 at the lower rate. ** Summary changed: - Mouse cursor moves way too slow in Unity 8 with a 1000Hz mouse + Mouse cursor is unusably slow in Unity 8 with a 1000Hz mouse -- 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/1539009 Title: Mouse cursor is unusably slow in Unity 8 with a 1000Hz mouse Status in QtMir: Confirmed Status in qtmir package in Ubuntu: Confirmed Status in unity8 package in Ubuntu: Confirmed Bug description: Logging in to Unity8 on desktop (xenial) the mouse cursor moves glacially slow. I have to move the mouse across the whole desk to get anywhere. This is surprising given bug 1524145 shows the opposite is happening in the Mir demo servers. ProblemType: Bug DistroRelease: Ubuntu 16.04 Package: unity8 8.11+16.04.20160122-0ubuntu1 ProcVersionSignature: Ubuntu 4.3.0-7.18-generic 4.3.3 Uname: Linux 4.3.0-7-generic x86_64 ApportVersion: 2.19.4-0ubuntu1 Architecture: amd64 Date: Thu Jan 28 18:32:27 2016 InstallationDate: Installed on 2015-12-03 (56 days ago) InstallationMedia: Ubuntu 16.04 LTS "Xenial Xerus" - Alpha amd64 (20151202) SourcePackage: unity8 UpgradeStatus: No upgrade log present (probably fresh install) To manage notifications about this bug go to: https://bugs.launchpad.net/qtmir/+bug/1539009/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp

