Ubuntu / XWindow bug? Lags when mixxx window out of visible area

[mixxxbot]

Reported by: wihola
Date: 2017-03-23T14:52:44Z
Status: Confirmed
Importance: Undecided
Launchpad Issue: lp1675438
Tags: waveform

---

I recorded the video, what's going on. There is no sound but picture is pretty self explanatory. I doubt it's a mixxx bug. Anyone else experienced that?
http://stunkit.com/data/files/2017-03-23.flv
Ubuntu 16.04 x64
Mixxx 2.0.1 alpha pre

It happens if waveform is under the launcher. Need to move out of view area more than 50% of the window.

[mixxxbot]

Commented by: daschuer
Date: 2017-03-23T20:32:36Z

---

Thank you for reporting the bug.Unfortunately the video is not that self explanatory because I cannot see when you click and when the lag happens.

Please explain in words What did you do, what did you expect and what did Mixxx instead?

[mixxxbot]

Commented by: wihola
Date: 2017-03-24T00:39:30Z

---

I click all the time only one button Play. Look at the waveform when the window moved aside. It looks and feels like mixxx FPS drastically fall down. But mouse cursor speed is o.k.

[mixxxbot]

Commented by: Be-ing
Date: 2017-03-25T18:20:10Z

---

I have noticed this too. I presume it has something to do with how X and/or Qt handle OpenGL widgets that are off screen.

[JoergAtGithub]

@wihola Could you try the following development build of PR10989: https://github.com/mixxxdj/mixxx/suites/12873892391/artifacts/694473745

Does this build fixes the lagness you reported?

[daschuer]

The issue seems to be fixed in the latest 2.4-alpha.
I will ping Wihola on Launchpad.

[github-actions]

Expired for Mixxx because there has been no activity for 60 days.