Did an update lastnight and lost Unity in the drop box at the login screen. Gnome-shell working great.
Try going to Synaptic Package Manager and reinstall Unity.
My hometown on the Mississippi River.
Using a Asus 3632QM laptop with 8gig RAM, 750gig Hybrid.
Machine Registered 366271, 366273, 366275.
Registered Ubuntu user number 18630. Registered Linux user number 458093.
Last night I was going to update using synaptic and it said it was going to remove ubuntu-desktop. So, I cancelled and avoided loosing Unity.
This mornings update did not remove ubuntu-desktop. You need to re-install ubuntu-desktop. You want version 1.290.
I had this happen before. It was two or three days before I was allowed to install ubuntu-desktop. The libraries in the repositories do not match.
This is why I have an alternate desktop available when testing development branches. I have fvwm-crystal.
It is a machine. It is more stupid than we are. It will not stop us from doing stupid things.
Ubuntu user #33,200. Linux user #530,530
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I've got the same situation here except I've lost both unity and gnome-shell , when gnome-shell is selected it actually goes to classic , when unity is selected it just goes right back to the login window . Ubuntu-desktop is installed (1.290).
if it ain't broke you haven't tweaked it enough