Comment 9 for bug 662760

I'd like to confirm that I still regularly have this problem:

$ disper -e
no resolutions found for display CRT-0, falling back to: 800x600, 640x480
deletion of dangling metamode 144 failed

and that from experience the next disper command will cause the nvidia driver to exit.

Reading the comments so far it seems that a possible workround is to be sure that an external display is turned off before disconnecting it or undocking.
I'll start correlating the problem to my disconnect activity and see if its a reliable workround.