https://bugs.kde.org/show_bug.cgi?id=387901

keitalbame <keitalb...@posteo.net> changed:

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                 CC|                            |keitalb...@posteo.net

--- Comment #3 from keitalbame <keitalb...@posteo.net> ---
I believe issues bug 387901 and bug 391033 are reporting similar simptoms that
could be cause by the same issue.

I'm seeing this multimonitor bugs since at least August, 2017(I know, I should
have filed a bug earlier but life... :) ), on a Arch install on my Dell E6400.
I was hopping that Plasma 5.13 would resolve this but it only seems to
attenuate a little bit.

At the moment, my main laptop (Dell E6230 with dock) is on Fedora 28 with
Plasma 5.13 and I'm still seeing similar issues.

The "missing" applications seems to be more localized when I close the lid of
the laptop while the external monitor is connected.

If I undock the laptop(with lid open to keep the laptop to suspend), all
applications are visible in task manager.
Docking again, all aplications on external monitor, are now visible in task
manager.
If I want to have the lid closed while docked and applications showing
correctly, I use the workaround "kquitapp5 plasmashell && plasmashell". This
make the applications to reappear in the task manager.

It sometime happens when I've turn off monitor while lid is closed(laptop
suspends) and I resume from suspend undocked, but I cannot reproduce everytime.

I noticed that a file with suffix _lidOpened is created in
~/.local/share/kscreen, when I close the lid(while docked and external monitor
connected), and the file is removed when lid is reopened, while in the dock.
The _lidOpened file is not deleted when I've turn off monitor while lid is
closed(laptop suspends) and I resume from suspend undocked.

Not sure if related, but I see 5 different panel ids configured in cat
~/.config/plasmashellrc, when I only use 2 panels.
When I remove the panels, they are not removed from the config file.
If I move a panel to another position on the same or other monitor, the
previous configuration is not removed. Sometimes, the configuration is not
correct, for example, showing a horizontal panel as vertical and incorrect
resolution.
Also, if you manually remove a panel from the config, it will not reappear on
the config after laptop restart or plasmashell restart.
I deleted ~/.config/plasmashellrc, restarted plasmashell, created new panels
and moved the panels to its final position to have a cleaner config file but
task manager still have the same behaviour.

My normal setup is:
Laptop screen only: Default Panel with only filter "show only windows from
current screen" enabled.
Laptop and External monitor: 
  * Laptop on the left side: Left Vertical Empty Panel with Icons Only and with
only filter "show only windows from current screen" enabled.
  * External screen on the Right side: Bottom Horizontal Default Panel with
only filter "show only windows from current screen" enabled.

External monitor is connected to the dock using direct (no adaptador of any
sort) DisplayPort-DisplayPort cable. I will try to change my setup to use a
DVI-DVI and see if there is any changes.

Attached kscreen and plasmashellrc config files.

I know this comment is long and apologies if its not very clear.

If someone has more information on how to troubleshoot this further let me
know.

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