VGA out: block KDE handling?

I have always had trouble disconnecting from VGA and have often had to hard shutdown.
However, until last week VGA connecting almost always worked flawlessly. KDE recognised the addition of the screen and asked to configure it. Usually, it asked if I wanted to configure it twice but, still, it asked and it configured. I could unify or not unify outputs, get the right resolution out etc. etc. Usually it all "just worked" (until I needed to disconnect - then all hell broke loose).
Last week, it stopped working flawlessly. At the time, I assumed it was because I was in the middle of a job interview (which I didn't get though probably not because of the IT failures). If I unified outputs, I got no signal out to VGA. In the end I didn't unify them and rather awkwardly tried to switch slides and demonstrate software while looking over my shoulder at the screen.
Today, it failed me in class so it isn't just the sod's law effect. If I unified outputs, no VGA out. I also couldn't somehow get the resolution quite right so the very top of my presentation was cut off and the text was a little fuzzy. (It was readable but not very nice looking.) I'd set the VGA out to 1024x768 with Auto refresh which are the settings I've used before with this projector.
I'm wondering. Is there some way of just stopping KDE from handling this stuff and maybe trying to do it with just xrandr from the command line? (And maybe ultimately a udev script if I ever get it working and figure out what udev is all about - currently on my learning list.)
Or would that just be a very bad idea? I just thought it might be easier to figure out what is going on and there is clearly something rather weird about KDE's settings since it seems to always ask about everything twice.
Last edited by cfr (2012-04-27 01:03:16)

I discovered that if I stop the kdm daemon rather than restarting it, it still restarts and I can get back to normal. This is the first time I've managed to not have to reboot the machine.
I'd still like to know if there's a way to stop KDE handling this stuff & if that might help. This and the mic are driving me nuts!

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