Bug 439763

Summary:	When I try to do this command:"xrandr --output DisplayPort-0 -s 1920x1080 --scale-from 3840x2160",then my whole screen looks buggy,I see my desktop in the top left corner and everything else is black.
Product:	[Plasma] kwin	Reporter:	Toadfield <toadfield>
Component:	xrandr	Assignee:	KWin default assignee <kwin-bugs-null>
Status:	RESOLVED DUPLICATE
Severity:	normal	CC:	nate
Priority:	NOR
Version First Reported In:	5.22.3
Target Milestone:	---
Platform:	Other
OS:	Linux
Latest Commit:		Version Fixed/Implemented In:
Sentry Crash Report:

Description Toadfield 2021-07-12 00:36:12 UTC

I tried to do this command:"xrandr --output DisplayPort-0 -s 1920x1080 --scale-from 3840x2160" but when I do this then my whole screen looks buggy,I see my desktop in the top left corner and everything else is black.

I asked somewhere else already and someone said that I should disable kscreen,but that doesn't help.

This is a kde problem,cause it doesn't happen with any other de.

Is there any workaround or fix?

This is my system info: https://i.nuuls.com/siBA7.png

Comment 1 Nate Graham 2021-08-03 00:26:38 UTC

Mixed DPIs are not supported on X11. Only Wayland explicitly supports this use case.

*** This bug has been marked as a duplicate of bug 414866 ***