Bug 404324

Summary: Font size becomes too big when connected to external 4k screen
Product: [Plasma] KScreen Reporter: Guo Yunhe <i>
Component: commonAssignee: Sebastian Kügler <sebas>
Status: RESOLVED FIXED    
Severity: normal CC: nate
Priority: NOR    
Version First Reported In: 5.14.5   
Target Milestone: ---   
Platform: Other   
OS: Linux   
Latest Commit: Version Fixed/Implemented In:
Sentry Crash Report:
Attachments: Screenshot of Kate when connected to 4k screen

Description Guo Yunhe 2019-02-14 08:42:51 UTC
Created attachment 118058 [details]
Screenshot of Kate when connected to 4k screen

SUMMARY

I have a laptop with 14 inch Full HD screen. Scale factor is 1. When connected to a big 4K external screen (only external screen and disable laptop screen), window font size becomes really big and clipped. Only Qt applications are affected.

STEPS TO REPRODUCE
1. Open some windows of KDE/Qt applications in a laptop with HD or Full HD resolution. Scale factor is 1.
2. Connect to external 4k screen. (external screen only)
3. Observe the font size changes.

OBSERVED RESULT

Font size is really big and clipped. See attachment.

EXPECTED RESULT

Font size should not change.

SOFTWARE/OS VERSIONS
Windows: 
MacOS: 
Linux/KDE Plasma: openSUSE Tumbleweed
(available in About System)
KDE Plasma Version: 5.14.5
KDE Frameworks Version: 5.54.0
Qt Version: 5.12.0

ADDITIONAL INFORMATION
Comment 1 Nate Graham 2019-02-14 21:04:05 UTC
What's the font DPI set to in System Settings > Fonts > Force Fonts DPI? The default value, or something else?
Comment 2 Guo Yunhe 2019-02-19 10:07:14 UTC
(In reply to Nate Graham from comment #1)
> What's the font DPI set to in System Settings > Fonts > Force Fonts DPI? The
> default value, or something else?

It is the default value
Comment 3 Nate Graham 2022-11-08 20:34:13 UTC
This should be fixed now.