Bug 371251

Context: I sometimes have an external VGA monitor connected to my laptop, which I unplug sometimes.

* Problem 1: The panel consistently appears on the external monitor, even though I consistently indicate the built-in laptop monitor as "primary". Just a suggestion: you could try to clarify the semantics of "primary monitor", for example in the help section of the configuration dialog. 
This problem is around since Plasma 5.

* Problem 2: Since a few weeks, when unplugging the external monitor, the panel remains on the external screen (and thus remains invisible) or migrates back to the built-in screen. This behavior is erratic and independent of the choices I make in the System Settings / Display and Monitor.

* Problem 3: Until a few days ago, I still managed to reestablish a new panel on the built-in screen of the laptop with a "create panel" menu item of the desktop menu. This menu item has disappeared.


[Version info: 
Opensuse linux:
> uname -a
Linux persepolis.site 4.1.31-30-default #1 SMP PREEMPT Wed Aug 24 06:20:09 UTC 2016 (de9ddf8) x86_64 x86_64 x86_64 GNU/Linux

Qt version (if it helps ...):
> qmake --version
QMake version 2.01a
Using Qt version 4.8.6 in /usr/lib64
]




Reproducible: Sometimes

Steps to Reproduce:
The projection of the panel is always on the wrong screen. That is about the only thing that is deterministic. All the rest is erratic and unpredictable. 

Actual Results:  
I cannot use my laptop anymore without an external monitor. Differently said, when using the laptop stand-alone, I cannot control essential functionality any more, like connecting to the internet. The system is practically unusable.

Expected Results:  
This is sort of a wish list:
* I would like to be able to configure the position of the panel myself, instead of having the system make a dictatorial choice for me. (see Problem 1)

* When detaching an external monitor (either automatically, when unplugging the monitor, or after using the Display and Monitor dialog), I would like revert to a situation where essential system information is still visible and not projected to some sort of nirvana. (see Problem 2)

* If all else fails (which unfortunately happens quite often recently), I would like to be able to restore reasonable defaults (see Problem 3) without fumbling around with system configuration files.