https://bugs.kde.org/show_bug.cgi?id=469227
Bug ID: 469227
Summary: When switching screens on in specific order, tooltips
and dashboard may appear at wrong positions/screen
Classification: Plasma
Product: plasmashell
Version: 5.27.4
Platform: Exherbo
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: generic-multiscreen
Assignee: plasma-b...@kde.org
Reporter: li...@bernd-steinhauser.de
CC: aleix...@kde.org, notm...@gmail.com
Target Milestone: 1.0
SUMMARY
Got two screens, one connected via DP (priority 2, left) and one connected via
HDMI (priority 1, i.e. "primary", right).
My panel is relatively close to the standard panel layout, except that I use
dashboard as a start menu instead of kickoff.
When I start up, everything is working as expected all the time, i.e. nothing
goes wrong until I turn off the screens.
If I turn off the screens and then turn them on again, it depends on the order
of switching them on whether the positioning of several things is correct or
not.
Variant 2:
1. DP (priority 2) on
2. HDMI (prioriy 1) on
Result: correct positioning
Variant 2:
1. HDMI (prioriy 1) on
2. DP (priority 2) on
Result: incorrect positioning
I found two ways of fixing this. Either the screens are switched off and then
switched on again according to variant 1. Or the primary screen switch in the
kcm is switched back and forth between the two screens.
correct positioning:
Dashboard shows up on the (primary) screen where the panel is.
Tooltips (e.g. task manager, or the notification popup, when you click on the
bell) show up at their correct positon.
All context menus show up at the correct positions.
incorrect positioning:
Dashboard shows up on the priority 2 screen.
Tooltips show up on the primary screen, but are aligned to the left screen edge
(the one between the two screens).
Some context menus show the same behavior as the tooltips: right click on
clock, systray items and empty panel area
right click on task manager items shows the context menu at the correct
position, as does it for any other context menu (e.g. in some app like konsole
or firefox).
I did not observe any other apps/widgets to misbehave.
SOFTWARE/OS VERSIONS
Linux/KDE Plasma: 5.27.4
KDE Plasma Version: 5.27.4
KDE Frameworks Version: 5.105.0
Qt Version: 5.15.9
ADDITIONAL INFORMATION
It doesn't seem to happen every time I use variant 2, but in the clear majority
of my tries.
It could depend on how quickly I proceed with the second screen, but I'm not
sure yet.
If it would be helpful, I might try to investigate this specifically.
Since variant 2 is the way I normally switch on my screens after turning them
off, I'm about 90% sure that this bug didn't happen in the first versions of
5.27. Unfortunately, I don't have a quick way to test this specifically without
major effort. If it's clear in which git repo I have to look, I could try to
bisect the issue.
There are two bug reports that could be related.
bug 468613 reports a wrong positioning of the task manager tooltips, but in
this case they do end up on a wrong screen, so I'm not sure if it's the same
thing.
bug 383067 I reported years ago, where the dashboard also appeared on the wrong
screen. But in this case it was only the dashboard and I actually reported it
as working before 5.27, so it might just be the same symptom.
I tested on both X11 and wayland and at least the dashboard thing happens on
both. For the tooltips I'm not 100% sure, at least in the few tries I did, they
didn't appear wrongly positioned.
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