I had a lot of problems with the nvidia driver and external monitors when I first bought my macbook.
At one point, I'd installed packages from "thefirstm" PPA. I thought I'd removed all of these, but while debugging this problem I noticed that at least one package from that PPA was still installed:
mbp-nvidia-bl-dkms 0.22~jaunty
I purged it just before purging nvidia-glx-180, and it appears it may have been running... Note the version of nvidia-bl-dkms on my system is now 0.14.
Also, while debugging this problem, and before discussing with Bryce, I did a manual update and noticed that a new version of dkms was installed.
Two other possibly related items...
I had a lot of problems with the nvidia driver and external monitors when I first bought my macbook.
At one point, I'd installed packages from "thefirstm" PPA. I thought I'd removed all of these, but while debugging this problem I noticed that at least one package from that PPA was still installed:
mbp-nvidia-bl-dkms 0.22~jaunty
I purged it just before purging nvidia-glx-180, and it appears it may have been running... Note the version of nvidia-bl-dkms on my system is now 0.14.
Also, while debugging this problem, and before discussing with Bryce, I did a manual update and noticed that a new version of dkms was installed.