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In case, if working in dual-head mode, most important menus (like shut down dialog, KDM, "run..." menu) should to be displayed in both screens.

This would be necessary, when e.g. you are booting a PC with external monitor/ projector, and external projector is still warming up / cable is unplugged, but 2nd screen is presented in xorg.conf/ external device is on your back (e.g. presentation) etc

Lukas wrote:In case, if working in dual-head mode, most important menus (like shut down dialog, KDM, "run..." menu) should to be displayed in both screens.

This would be necessary, when e.g. you are booting a PC with external monitor/ projector, and external projector is still warming up / cable is unplugged, but 2nd screen is presented in xorg.conf/ external device is on your back (e.g. presentation) etc

Can you clarify what you mean? You run a X-server with two "monitors" and placing the second rightof the first? Can't you use the clone option (is this nvidia only?), or such?. Can you explain why this is a kde issue and not a xorg issue? *I don't get it*

bratwurst wrote:Can you clarify what you mean? You run a X-server with two "monitors" and placing the second rightof the first? Can't you use the clone option (is this nvidia only?), or such?. Can you explain why this is a kde issue and not a xorg issue? *I don't get it*

Us mods had the same problem determining if this post is KDE specific or not. But Zarin (KDE Kwin dev) assured that it is, but it's unlikely to be implemented.
I also don't know why OP wouldn't prefer clone option it's more logical especially for projector.
So I'm also one of curious ones why this would be useful.

I'm sorry if I made my self unclear.

Maybe the present situation of my own would explain more.
I have a laptop with 15.4" (1280x800) display. I think nobody would disagree that using another 21" + laptops 14.4" monitors is more comfortable and productive. Still, sometimes I'd like to plug my laptop to my HD ready TV as a dvd player.

The problem is that if just simply unplug 21" in one room an plug it to TV in another room, the TV would sincerely announce "Input mode not supported" since external monitor has bigger resolution than my TV could handle. In this case I am unable to see my default right screen (including kicker, , and that's annoying.

The most easy solution to change resolution of external display (and the only one that my family understands ) is to simply logout and re-login the user (press power button and click logout), but if primary monitor is unavailable (the shut down dialog appears only on most right display), well..... "hard restart" (press power button for 10 sec) came into place