https://bugs.kde.org/show_bug.cgi?id=458667
Bug ID: 458667
Summary: Plasmashell gets confused about displays in a 3
display setup when one display is
disconnected/reconnected/changed online
Product: plasmashell
Version: 5.25.4
Platform: Other
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: Multi-screen support
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected], [email protected]
Target Milestone: 1.0
I have a 3-monitor setup around my laptop:
1) Native laptop display
2) Displayport display, usually connected and turned on
3) HDMI port is connected to a HDMI switch which can route it to a HDMI
projector, external soundsystem, etc. HDMI IDs supplied by the HDMI switch can
vary (from disconnected to various display ids)
***
STEPS TO REPRODUCE
1. Multi-display setup (I use 3)
2. Disconnect and reconnect display(s) online (no restart); switch one display
with a different ID display; flip the notebook lid up and down (to turn off
native display). It's just the physical connect and disconnect and state change
of the displays, don't touch any settings.
OBSERVED RESULT
Any of the above operations will result, not always but at random times, in
some of these consequences:
- Displays IDs switched (Display 1 listed as Display 2 and vice-versa, physical
characteristics flipped). Probably upstream.
- Display IDs duplicated (Display 1, Display 1). Probably upstream.
- Toolbars swapped between displays, even when the final configuration is
identical to the initial configuration. The toolbar "dance" gets persisted:
even if immediately restarting computer, primary display toolbars remain moved
on secondary or vice-versa
- Toolbars wrongly sized on displays
- Primary display switch not working in settings to change primary display
- Display positions moved around the global rendering coordinates, even when
final config is identical to initial
- HDMI display resolution or scaling changed for previously known display
(including when final = initial)
Some of these problems seem upstream (cannot be fixed until rebooting the
system); duplicate device IDs seems to be one of them.
Others are immediately fixed by plasmashell --replace
EXPECTED RESULT
- Previously known configurations retain the same primary display, as well as
per-display resolution, scaling, and global coordinates
- Toolbars are properly positioned
- Toolbars never jump from primary display to a secondary or vice-versa
SOFTWARE/OS VERSIONS
FC36
Plasma 5.25.4
KDE Frameworks Version: 5.97.0
Qt Version: 5.15.5
Display ports: Intel HD 4600 (possibly relevant for upstream bugs)
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