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List:       kde-bugs-dist
Subject:    [plasmashell] [Bug 347195] Panel disappears after an external monitor is unplugged
From:       Martin Kostolný <clearmartin () zoho ! com>
Date:       2015-07-28 18:26:24
Message-ID: bug-347195-17878-s43Ejs65hM () http ! bugs ! kde ! org/
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https://bugs.kde.org/show_bug.cgi?id=347195

Martin Kostolný <clearmartin@zoho.com> changed:

           What    |Removed                     |Added
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                 CC|                            |clearmartin@zoho.com

--- Comment #6 from Martin Kostolný <clearmartin@zoho.com> ---
I just wanted to add similar bug report... I can confirm this behaviour but I'm
having more issues then just a missing panel. Here is list of steps with
situation description:

1)
Connect external monitor (ideally with the same resolution as your standard
one)

2)
In Display Configuration settings set up the external monitor to be above the
standard one and make it primary.

3)
Apply
- now standard monitor's screen lacks background (is black)
- from now on this will happen every time external monitor gets connected
+ right-clicking the black screen is not working

4)
Disconnect external monitor
-> standard monitor's screen is still black (always) + panel is gone (always) +
some windows can be inaccessible (often)
-> restarting plasmashell helps but it will not repair everything:
    - specifically disappeared windows - like konsole (but also other like
kwrite) - window can disappear and never appear again (I mean: it is also
missing from task manager and alt+tab), can only be killed as a process
    - this complicate the possibility of plasma restarting (because krunner
gets sometimes inaccessible on Alt+F2, too)

5)
You can now connect external monitor, move some windows on it / from it;
disconnect monitor and see which windows left visible but overall plasmashell
state is broken at this point.

Note that nothing crashes during the process (plasmashell, kwrite and
disappeared windows - their processes - still run).

This test was also performed with entirely new user (empty home -> stock
settings) and with compositing disabled. Rootless Xorg (without display
manager).
Plasma 5.3.2
KDE Applications 15.04.3
KF 5.12.0
intel video

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