[Bug 274520] New: Application not showed when primary monitor is unplugged

[Aurélien]

https://bugs.kde.org/show_bug.cgi?id=274520

           Summary: Application not showed when primary monitor is
                    unplugged
           Product: kde
           Version: 4.6
          Platform: Unlisted Binaries
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: NOR
         Component: dualhead
        AssignedTo: unassigned-bugs at kde.org
        ReportedBy: kde at ap2c.org


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.

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