Comment 9 for bug 201429

I'm not sure if the kwin crash while enabling a second monitor is related to the original problem. Nonetheless, I can confirm it with Kubuntu 8.10 using the intel driver on a 965GM (X3100) graphics chip. My workaround is to kill plasma first, do the xrandr commands, and reload plasma. If you do this then kwin won't crash during the transition. Since I have this mapped to a keyboard shortcut, it's less annoying than it could be.

There are certainly other plasma bugs with xrandr: the background and plasmoids aren't drawn on my internal LCD when an external monitor gets enabled. I can create a new panel and move it over, though.