Bug 374862

Summary:	Cannot place windows on the second screen
Product:	[Plasma] kwin	Reporter:	unfa <unfa00>
Component:	core	Assignee:	KWin default assignee <kwin-bugs-null>
Status:	RESOLVED FIXED
Severity:	normal	CC:	plasma-bugs-null
Priority:	NOR
Version First Reported In:	unspecified
Target Milestone:	---
Platform:	Other
OS:	Linux
Latest Commit:		Version Fixed/Implemented In:	5.11
Sentry Crash Report:
Attachments:	attachment-8142-0.html My desktop

Description unfa 2017-01-10 11:24:20 UTC

When I drag a window from the first screen ot the second one - it finally snaps back to the first screen.

If a window opens on the second screen - once I start dragging it, it momentarily snaps back to the first screen.


The only think I can do is drag the window so that it's over 50% on the second screen and then maximize the window - which maximizes it on the second screen. But trying to do anything else will snap the window back onto to first screen.

Comment 1 Martin Flöser 2017-01-11 06:42:38 UTC

Do you have a panel between the screens?

Comment 2 unfa 2017-01-11 08:37:14 UTC

No, each screen has it's own panel on the bottom - they are placed side-to-side.

This has started randomly after a regular system power cycle. Didn't upgrade anything else than CUDA and nVidia drivers lately.

Comment 3 Martin Flöser 2017-01-11 10:10:06 UTC

Created attachment 103348 [details]
attachment-8142-0.html

That is what I mean: do you have a panel on one screen which borders the other screen?

Comment 4 unfa 2017-01-11 13:38:50 UTC

Created attachment 103350 [details]
My desktop

This is how my desktop looks.

Trying to move a window forces the mouse to never cross the border between the monitors - the window itself can cross it though. I can maximize it on the right screen even, but not place it anywhere manually - the mouse will snap back to the left screen's right edge.

Comment 5 unfa 2017-01-11 15:54:15 UTC

I uploaded "My desktop" PNG image.

I tried  placing the panels on outer vertical edges of my screens (away from the middle) - but the window moving behaviour didn't change.

Comment 6 Martin Flöser 2017-01-11 16:14:49 UTC

Thanks for the image, that helps.

Comment 7 unfa 2017-01-12 08:20:30 UTC

I have found a solution!

Changing the Primary Display in Display Configuration seems to have fixed the problem for me.

Comment 8 Martin Flöser 2017-07-22 12:39:58 UTC

5.11 will have improvements concerning the window movement with multiple screens. It is quite likely that those changes also fixed this issue (personally I'm 99 % sure). Given that I mark as fixed. If you are able to reproduce with 5.11 I kindly request to reopen this issue.