I have a dual monitor setup, with two panels on the bottom. I have set up task manager in both monitors to only show applications on the current screen. However, this is only honored for default panels - after a while, applications on one monitor are ignored and applications on the other monitor are shown on both task managers (when they shouldn't). I will attach a screen shot to demonstrate this. Reproducible: Sometimes Steps to Reproduce: 1. Set up task manager to only show applications on current screen. 2. Logout / login / change some settings in the panel (not sure when the bug gets triggered) 3. Open applications, move them to other monitor and then back to the first one. Actual Results: Applications on first monitor are not displayed, applications on the second monitor are displayed on both monitors. Expected Results: Task manager should only show applications on current monitor. I am on openSUSE tumbleweed with everything updated to the latest version (Frameworks 5.17, Qt 5.5.1. Anything else at your disposal.
Created attachment 96225 [details] Demonstration of buggy Task Manager behavior on dual monitor On both panels, task manager has been set up to only show tasks from current screen. On the left side, there is only firefox and task manager settings, but none of them are displayed on the task bar (all windows are from the right monitor). On the right monitor (same task manager settings), dolphin is opened but is shown on both panels, and task manager setting <2> are also shown on both panels (only the right one should be shown. Firefox is nowhere to be seen. Only one activity and all windows are on the same desktop.
I am also observing this issue on my dual head setting on a Fedora 23 system with latest updates (KF 5.18, plasma 5.5.1). The filter for the screen seems to be completely ignored for the second screen. When I am moving a firefox task from the first screen to the second one, it is disappearing from the task bar on the first screen. (expected). If I move it back to the first screen, it is still shown on the second, but added to the first. This is making the feature totally broken currently.
Just upgraded to 5.5.3 and seems to fix the issue for me.
Plasma 5.5.3 did not make any difference for me, the same behaviour is there. Perhaps it has something to do with the graphics drivers? I am on a laptop with Intel HD 4000 graphics.
The latest upgrades seem to have fixed to problem for me. Not sure if it was Plasma or KDE Apps that did the trick though.
I don't think it is actually fixed. As reported it was fixed for me after the latest update series as well. I had a system restart today and the issue occured again. So I think either the update made it working sometimes or the issue is in general more random.
Same here, today the problem is still here.
Plasma 5.7 ships a fully-rewritten Task Manager backend which should resolve these issues. Note that the multiscreen code currently has further improvements under review that are not yet in 5.7 Beta. Please re-test with the Plasma 5.7 final release and feel free to reopen if problems do persist after all.
On my setup, I was not experiencing this issue on plasma 5.6.5, but I just upgraded to 5.7.1 and the task manager for two (out of three) of my screens now point to the opposite screen. The task manager on HDMI3 shows the applications on HDMI2 and the task manager on HDMI2 shows the applications on HDMI3.
This problem still persists on my setup. The windows on monitor HDMI-1 are displayed on the task manager of my other monitor DP-2, and vice-versa. Removing and replacing a panel has no effect. Switching primary monitors has not effect.
Created attachment 100181 [details] Screenshot demonstrating issue on 5.7.1
Persists on 5.7.3.
having that too with 4 monitors.
*** Bug 366173 has been marked as a duplicate of this bug. ***
*** This bug has been marked as a duplicate of bug 365246 ***
Problem still persists in KDE 5.7.5. I have tree monitors connected to single Nvidia card with latest nvidia proprietary drivers. Task manager on left screen shows window list from right screen and vice-versa, bet middle screen shows correct list of windows.
As previously mentioned, the changes for this are in 5.8 - 5.7.x test results are not useful at this point. Please do test the 5.8 beta though!
I'm not sure how to ask for reopening of a bug, so I try it just here - please reopen, bug is still present in 5.8. It is much less frequent, but still present! (exact version I am using is 5.8.4-1 and frameworks 5.29.0-1 on archlinux). Thnaks in advance.