Bug 359534

Summary:	When connecting external screen that is to the left of the primary screen, panel unexpectedly moves to secondary screen
Product:	[Plasma] plasmashell	Reporter:	Pavel S. <codeatstake>
Component:	generic-multiscreen	Assignee:	Aleix Pol <aleixpol>
Status:	RESOLVED FIXED
Severity:	major	CC:	ghost53947, nate, notmart, notuxius, plasma-bugs-null
Priority:	NOR
Version First Reported In:	5.5.4
Target Milestone:	1.0
Platform:	Fedora RPMs
OS:	Linux
Latest Commit:		Version Fixed In:	5.27.4
Sentry Crash Report:
Attachments:	xrandr output for the failing configuration

Description Pavel S. 2016-02-18 14:11:42 UTC

I have a problem with the dual screen setup on my T410 laptop. My laptop screen is set up to be the primary display. The second screen has a large resolution and is  set up to be on the left of the primary laptop screen. 

Reproducible: Always

Steps to Reproduce:
1. connect the second screen and set it up to be left of the primary screen, that contains a panel
the configuration should correspond to
xrandr --output LVDS-1 --mode 1440x900 --pos 1680x267 --rotate normal --primary --output DP-3 --mode 1680x1050 --pos 0x0 --rotate normal
2. log out and disconnect the second screen
3. log in
4. connect second screen during the session

Actual Results:  
The panel from the primary (right) screen is moved to the secondary screen on the left as soon as is becomes available, the alignment setting, that I thought to be the culprit has no effect.

Expected Results:  
The panel should stay on the primary screen no matter what.

machine: TinkPad T410
gpu: NVIDIA Corporation GT218M [NVS 3100M] (rev a2)
driver: nouveau
kernel: 4.3.5-300.fc23.x86_64

Comment 1 Pavel S. 2016-02-18 14:14:48 UTC

Created attachment 97281 [details]
xrandr output for the failing configuration

Comment 2 ghost53947 2016-03-28 16:14:17 UTC

I am experiencing the same issue, I have 3 monitors and the panel always goes to the left monitor, my primary output is set to the middle monitor over DVI-I. I am on arch linux plasma-desktop 5.6.0-1 ,plasma-workspace 5.6.0-1) after a reboot the panel will appear on the left screen. If I remove it and create a panel on the middle screen it does not keep it there after a reboot.

Comment 3 ghost53947 2016-03-29 17:04:17 UTC

It seems that cleaning the config files out. And upgradin to Qt5.6 fixed the issue for me. I removed all plasma and kde config. Similar to creating a new account. Now my Panel sticks to the screen I created it to.

Comment 4 ghost53947 2016-03-29 19:21:49 UTC

Seems that if the panel crashed and I need to kill plasma shell , the panel will be back to the left most screen. If I set the primary output to the left screen (HDMI) then the panel appears on the middle screen for some reason. If I set the primary output the the middle screen (DVI-I) the panel is on the left screen.

Comment 5 Alexander Mentyu 2018-03-05 14:41:42 UTC

Is this bug still reproducible?

Comment 6 Nate Graham 2023-04-21 14:46:54 UTC

This should be fixed today with Plasma 5.27 4. We've made a *lot* of changes to improve this use case.