Bug 423563

Summary: PLASMA_USE_QT_SCALING=1 causes Plasma to select a wallpaper appropriate for the logical DPI, not the physical DPI
Product: [Plasma] plasmashell Reporter: Nate Graham <nate>
Component: Image & Slideshow wallpaper pluginsAssignee: David Edmundson <kde>
Status: RESOLVED FIXED    
Severity: normal CC: plasma-bugs-null
Priority: NOR    
Version First Reported In: master   
Target Milestone: 1.0   
Platform: Other   
OS: Linux   
Latest Commit: https://invent.kde.org/plasma/plasma-workspace/-/commit/530b36abb0a0a04958417cf914906fb64ab64062 Version Fixed/Implemented In: 5.19.3
Sentry Crash Report:
Bug Depends on:    
Bug Blocks: 356446    

Description Nate Graham 2020-06-26 23:37:02 UTC 
With PLASMA_USE_QT_SCALING=1 set, the wallpaper chooser selects a wallpaper of an inappropriate size. For example if you have a 3840 x 2160 screen and you use a 2x scale factor, it will select a 1920x1080 wallpaper instead of the 3840 x 2160 version. Looks like it's looking at the logical screen resolution instead of the physical screen resolution.
Comment 1 Bug Janitor Service 2020-06-27 01:02:01 UTC 
A possibly relevant merge request was started @ https://invent.kde.org/plasma/plasma-workspace/-/merge_requests/119
Comment 2 Nate Graham 2020-06-29 18:49:14 UTC 
My patch stank, but David submitted a better one: https://invent.kde.org/plasma/plasma-workspace/-/merge_requests/126