Bug 411798

Summary:	laptop monitor (in multi-monitor setup) disappeared
Product:	[Plasma] KScreen	Reporter:	cybea <kde-bugs>
Component:	kcm	Assignee:	Sebastian Kügler <sebas>
Status:	RESOLVED FIXED
Severity:	normal	CC:	nate
Priority:	NOR
Version First Reported In:	5.16.5
Target Milestone:	---
Platform:	Neon
OS:	Linux
Latest Commit:		Version Fixed/Implemented In:	5.17.0
Sentry Crash Report:

Description cybea 2019-09-10 16:45:16 UTC

SUMMARY
I used to be able to "place" my laptop monitor and vga connected monitor relative to each other. This does not work at the moment.

STEPS TO REPRODUCE
1. open kscreen kcm module in system settings

OBSERVED RESULT
only external (VGA) monitor is shown

EXPECTED RESULT
all monitors (including laptop monitor) are shown

SOFTWARE/OS VERSIONS
Linux/KDE Plasma: kde-neon / 5.0.0-27-generic
KDE Plasma Version: 5.16.5
KDE Frameworks Version: 5.61.0
Qt Version: 5.12.3
xserver-xorg: 1:7.7+19ubuntu7.1

ADDITIONAL INFORMATION
If I unplug VGA monitor no monitor is shown at all. My monitor setup still works otherwise: from time to time I change to a different desk with a different external monitor that is placed at the other side of my laptop and the placement of this monitor is set correctly.
I don't know which software change contained this bug because I didn't change my monitor settings for several months.

Comment 1 cybea 2019-09-10 16:53:39 UTC

I just learned that this only happens if the external monitor is connected before login. If I connect it after login both monitors are shown correctly.

Comment 2 Nate Graham 2019-09-12 16:03:40 UTC

This should be fixed in Plasma 5.17, where the KScreen KCM was rewritten. I was just testing this use case yesterday and it works great now!