touch-packages team mailing list archive

[Daniel van Vugt <daniel.van.vugt@xxxxxxxxxxxxx>]

OK, so sounds like a Mir bug, but a Mir bug that only Unity8 would ever
hit. Because the bug would only happen in clients (or nested servers)
who use the relative motion data instead of the usual absolute motion
data.

We're only delivering one relative motion event to Unity8 every 17ms
(59Hz as intended). Therefore on your normal 125Hz mouse we're dropping
50% of the motion information. And on my 1000Hz mouse we're missing 94%
of the motion data.

It's a solid theory that explains everything we've seen.

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Touch seeded packages, which is subscribed to mir in Ubuntu.
https://bugs.launchpad.net/bugs/1539009

Title:
  Mouse cursor is unusably slow in Unity 8 with a 1000Hz mouse

Status in Mir:
  Triaged
Status in QtMir:
  Incomplete
Status in mir package in Ubuntu:
  Triaged
Status in qtmir package in Ubuntu:
  Incomplete
Status in unity8 package in Ubuntu:
  Incomplete

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)

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