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Re: [Bug 1539011] Re: [regression] Window resizing is very choppy and stutters (border does not smoothly follow the mouse)

 

On 03/02/2016 03:27, Daniel van Vugt wrote:
> Also note the current window resizing implementation in QtMir is
> creating additional lag that shouldn't be there. Waiting for the client
> to update simply takes too long. As a result, the window edges lag
> behind the mouse cursor. However since Unity8 renders its own mouse
> cursor there should be _zero_ visible lag between the cursor and the
> screen, as demonstrated with:
>

The "laggy and choppy" resize for apps that are slow to redraw/relayout 
is all Unity 8, not QtMir. I can implement it the way you want (making 
window border follow mouse and filling the empty space between it and 
the surface with white for instance) without changing a single line in 
QtMir.

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https://bugs.launchpad.net/bugs/1539011

Title:
  [regression] Window resizing is very choppy and stutters (border does
  not smoothly follow the mouse)

Status in QtMir:
  Invalid
Status in Ubuntu UX:
  New
Status in qtmir package in Ubuntu:
  Invalid
Status in unity8 package in Ubuntu:
  New

Bug description:
  Just tried Unity8 desktop for the first time since October and found
  some things don't work as well as before. One of them is window
  resizing, which is now every choppy and stuttering.

  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 18:39:38 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)
  upstart.unity8-dash.log: Attempted to deliver an event to a non-existent window, ignoring.

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References