Bug 431023

Summary:	[patch] KWindowSystem does not respect the selected X11 screen
Product:	[Frameworks and Libraries] frameworks-kwindowsystem	Reporter:	John Lindgren <john>
Component:	general	Assignee:	KWin default assignee <kwin-bugs-null>
Status:	RESOLVED FIXED
Severity:	normal	CC:	john, nate, nicolas.fella
Priority:	NOR
Version First Reported In:	5.77.0
Target Milestone:	---
Platform:	Arch Linux
OS:	Linux
Latest Commit:		Version Fixed/Implemented In:	5.78
Sentry Crash Report:
Attachments:	xcb: Work with the active screen as reported by QX11Info::appScreen().

Description John Lindgren 2021-01-01 03:29:33 UTC

Created attachment 134431 [details]
xcb: Work with the active screen as reported by QX11Info::appScreen().

SUMMARY

On a traditional X11 multi-head setup (e.g. two screens ":0.0" and ":0.1" active), KWindowSystem ignores the screen it is run on and enumerates/manages windows on screen #0.

The fix is pretty simple as it's just a matter of passing the correct screen number to NETRootInfo::NETRootInfo().

STEPS TO REPRODUCE
1. export DISPLAY=:0.1
2. run https://github.com/jlindgren90/qmpanel

OBSERVED RESULT
qmpanel lists the windows on screen #0

EXPECTED RESULT
qmpanel should list the windows on screen #1

SOFTWARE/OS VERSIONS
KDE Frameworks Version: 5.77.0
Qt Version: 5.15.2

Comment 1 Nicolas Fella 2021-01-01 18:10:59 UTC

Plesse submit patches to https://invent.kde.org/frameworks/kwindowsystem

Comment 2 Christoph Feck 2021-01-01 20:31:52 UTC

Instructions are documented at https://community.kde.org/Get_Involved/development#Submit_a_Merge_Request

Comment 3 John Lindgren 2021-01-02 18:38:54 UTC

So I have to create yet another online account. Submitting a patch to the bugtracker isn't good enough?

Any why is my email a valid username on the bugtracker, but not on identity.kde.org?

You folks sure don't make contributing easy.

Comment 4 John Lindgren 2021-01-02 18:40:28 UTC

"Service Unavailable

The server is temporarily unable to service your request due to maintenance downtime or capacity problems. Please try again later.

Additionally, a 503 Service Unavailable error was encountered while trying to use an ErrorDocument to handle the request."

This is ridiculous. Please just take the patch.

Comment 5 John Lindgren 2021-01-02 18:48:25 UTC

Okay I fought with your website a bit more and got it to work.

https://invent.kde.org/frameworks/kwindowsystem/-/merge_requests/12