https://bugs.kde.org/show_bug.cgi?id=369511
Bug ID: 369511
Summary: Better window placement when connecting additional
screen: Keep parent / active screen
Product: kwin
Version: 5.6.5
Platform: Gentoo Packages
OS: Linux
Status: UNCONFIRMED
Severity: normal
Priority: NOR
Component: multihead
Assignee: kwin-bugs-n...@kde.org
Reporter: dra...@speciesm.net
Example:
There is a single, primary screen 1024*768 and another unconnected 1024*768
screen. A window is anchored in the top left corner, its position is
accordingly [0,0]. When a new screen is connected and moved to the right side
of the existing screen, the desktop gets extended over the second screen so one
has a 2048*768 desktop, no issues so far.
But when the second screen is initially connected (or moved after being
connected) to the LEFT side of the primary screen, this screen is then no
longer at 0,0, but at 1024,0. So windows at position [0,0] suddenly get moved
to the other screen while they should be updated along the screen they are
currently on… i.e. [1024,0] position so they stay on the initial screen.
This might not be a big issue for the regular desktop setup. But when one has a
laptop with the laptop LCD as the primary screen, external screens usually have
vastly different resolutions. Maximised windows get thrown onto the other
screen an might scale in undesired ways. Or even worse: A beamer is connected
and suddenly private notes or other things are thrown onto the new screen and
thus visible to everyone watching the beamer.
The desired behavior would be that when changing the screen resolution due to
another output connected, kwin checks which screen a window is currently
anchored on adds whatever translation this screen gets also to the window
positions.
For convenience also an ASCII-Art picture, (needs monospace font)
[ 1 ]
[ WW ] (only screen 1 active)
[ WW ]
Then another screen is connected:
[ 2 ][ 1 ] [ 2
][ 1 ]
[ WW ][ ] while it should be: [
][ WW ]
[ WW ][ ] [
][ WW ]
Reproducible: Always
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