Bug 466076 - Spectacle lagging in a mixed DPI setup
Summary: Spectacle lagging in a mixed DPI setup
Status: RESOLVED FIXED
Alias: None
Product: Spectacle
Classification: Applications
Component: General (other bugs)
Version First Reported In: 22.12.2
Platform: Other Linux
: NOR minor
Target Milestone: ---
Assignee: Boudhayan Gupta
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2023-02-19 12:22 UTC by Tarballwalf
Modified: 2023-02-21 23:52 UTC (History)
2 users (show)

See Also:
Latest Commit:
Version Fixed/Implemented In: 23.04
Sentry Crash Report:

Attachments
reprezentation of the poor perfromance, along with the observed temporary fix (3.34 MB, video/mp4)
2023-02-19 12:22 UTC, Tarballwalf 		Details
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Description Tarballwalf 2023-02-19 12:22:32 UTC 
Created attachment 156483 [details]
reprezentation of the poor perfromance, along with the observed temporary fix

SUMMARY
Trying to take a region capture while having a mixed DPI display setup results in spectacle servery lagging/dropping performance. This issue seems to happen even if the display has already been connected (not docking the laptop resulting in a "new" display to be attached)


STEPS TO REPRODUCE
1. Have a mixed DPI setup (100% and 120% in my case)
2. Try taking a region capture

OBSERVED RESULT
Selection starts lagging

EXPECTED RESULT
Should be buttery smooth, just like on one monitor

SOFTWARE/OS VERSIONS
Linux/KDE Plasma:  Manjaro KDE (Unstable branch)
(available in About System)
KDE Plasma Version: 5.27.0
KDE Frameworks Version: 5.103.0
Qt Version: 5.15.8

ADDITIONAL INFORMATION
Running on Plasma Wayland session
Going into settings and disabling and re-enabling the scaled display seems to temporarily fix this issue
Comment 1 Nate Graham 2023-02-21 23:52:51 UTC 
This is fixed in the upcoming 23.04 release which re-rwore the rectangular region UI to be radically faster and more performant.