Bug 274520

Summary:	Application not showed when primary monitor is unplugged
Product:	[Plasma] kwin	Reporter:	Aurélien <kde>
Component:	general	Assignee:	KWin default assignee <kwin-bugs-null>
Status:	RESOLVED WORKSFORME
Severity:	normal	Keywords:	triaged
Priority:	NOR
Version:	unspecified
Target Milestone:	---
Platform:	Unlisted Binaries
OS:	Linux
Latest Commit:		Version Fixed In:
Sentry Crash Report:

Description Aurélien 2011-05-30 15:37:08 UTC

Version:           4.6 (using KDE 4.6.3) 
OS:                Linux

A laptop has a dual screen with its internal and an external monitor. The external one is set as the primary monitor and everything goes well.

However if KDE is launched when the external monitor is unplugged the menubar is not showed and applications are not showed on the screen.

When I switch between applications started (Alt+tab) I can see they are still because their list appears on the screen but I can't see them or interact with them.

I guess that KDE doesn't configure the only monitor as the primary one and try to show the application on the "missing" monitor! It leads to an unusable KDE.

Reproducible: Didn't try

Steps to Reproduce:
* Configure dual monitors with a laptop and an external monitor
* Set the external monitor as the primary and configure this settings as default
* Exit KDE
* Unplug the external monitor
* Start KDE

Actual Results:  
The menubar and the application are not showed on the laptop monitor. Impossible to interact with application.

Expected Results:  
KDE should compare the available monitors to the default settings and try to adapt the configuration with the available monitors.

Then the menubar (which is normally showed on the primary monitor) have to be printed on the available monitor and all the applications should be showed on this monitor too.

Comment 1 Martin Flöser 2011-05-30 22:46:50 UTC

hmm maybe wrong information from kephal or krandr? I assume with "menubar" you mean the Plasma panel, right?

Comment 2 Aurélien 2011-05-30 22:55:43 UTC

The only thing I know is that xrandr return in all case the correction information about monitors. And you're right, I was speaking about plasma (for "menubar" :)

Comment 3 Thomas Lübking 2012-03-19 20:39:27 UTC

This sounds like you configure a multiscreen setup (via xrandr), remove the primary monitor and wonder why you cannot see anything?!

First off, it's not sth. the windowmanager actually cares about (kwin doesn't control the desktop widget, thus the menubar size) or handles, nevertheless

a) is this still a problem?
b) what kind of gpu an monitors are here involved? More important: how are those monitors attached?
c) i assume there's no(t been) such problem with removing the secondary screen?

Comment 4 Andrew Crouthamel 2018-09-23 02:26:22 UTC

Dear Bug Submitter,

This bug has been in NEEDSINFO status with no change for at least 15 days. Please provide the requested information as soon as possible and set the bug status as REPORTED. Due to regular bug tracker maintenance, if the bug is still in NEEDSINFO status with no change in 30 days, the bug will be closed as RESOLVED > WORKSFORME due to lack of needed information.

For more information about our bug triaging procedures please read the wiki located here: https://community.kde.org/Guidelines_and_HOWTOs/Bug_triaging

If you have already provided the requested information, please set the bug status as REPORTED so that the KDE team knows that the bug is ready to be confirmed.

Thank you for helping us make KDE software even better for everyone!

Comment 5 Andrew Crouthamel 2018-10-27 02:54:58 UTC

Dear Bug Submitter,

This bug has been in NEEDSINFO status with no change for at least 30 days. The bug is now closed as RESOLVED > WORKSFORME due to lack of needed information.

For more information about our bug triaging procedures please read the wiki located here: https://community.kde.org/Guidelines_and_HOWTOs/Bug_triaging

Thank you for helping us make KDE software even better for everyone!