Bug 432099 - If I set the same display scale factor to both X11 and Wayland sessions, display scaling is not applied to Wayland one
Summary: If I set the same display scale factor to both X11 and Wayland sessions, disp...
Status: RESOLVED INTENTIONAL
Alias: None
Product: plasmashell
Classification: Plasma
Component: general (show other bugs)
Version: 5.20.90
Platform: Arch Linux Linux
: NOR normal
Target Milestone: 1.0
Assignee: David Edmundson
URL:
Keywords: wayland
Depends on:
Blocks:
 
Reported: 2021-01-25 15:37 UTC by Patrick Silva
Modified: 2021-02-23 04:34 UTC (History)
4 users (show)

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Description Patrick Silva 2021-01-25 15:37:24 UTC 
STEPS TO REPRODUCE
1. boot your machine
2. start Wayland session
3. set display scale to 125% in Display Configuration KCM
4. reboot
5. start X11 session
6. set display scale to 125% in Display Configuration KCM
7. reboot
8. start Wayland session
9. open Dolphin: noitce that Dolphin window is not scaled as it should
10. open Display Configuration KCM: scale factor is still set to 125% despite
it is not working

EXPECTED RESULT
display scale factor set in Display Configuration KCM should always work on Wayland session

SOFTWARE/OS VERSIONS
Operating System: Arch Linux
KDE Plasma Version: 5.20.90
KDE Frameworks Version: 5.78.0
Qt Version: 5.15.2
Comment 1 Nate Graham 2021-01-26 01:20:35 UTC 
Can reproduce. You need to apply the scale factor a second time once you're in the Wayland session.
Comment 2 phrxmd 2021-02-22 07:32:02 UTC 
Can confirm with 5.21.

Operating System: openSUSE Tumbleweed 20210220
KDE Plasma Version: 5.21.0
KDE Frameworks Version: 5.79.0
Qt Version: 5.15.2
Kernel Version: 5.10.16-1-default
OS Type: 64-bit
Graphics Platform: Wayland
Processors: 8 × Intel® Core™ i7-8550U CPU @ 1.80GHz
Memory: 15.5 GiB of RAM
Graphics Processor: Mesa DRI Intel® UHD Graphics 620
Comment 3 David Edmundson 2021-02-22 23:38:26 UTC 
Yes and for technical reasons it will stay this way. 

On a wayland login the generator should pick a good scale factor.
Comment 4 Nate Graham 2021-02-23 04:29:31 UTC 
> Yes and for technical reasons it will stay this way. 
To me that sounds more like "we can't or won't fix this" than it does "this isn't a bug." Changing status accordingly.
Comment 5 Nate Graham 2021-02-23 04:34:10 UTC 
> On a wayland login the generator should pick a good scale factor.
For me it picks 200% but that doesn't actually get applied. I suppose that must be a separate bug if what Patrick reported is known and not fixable or worth fixing, so I have filed Bug 433460