Ctrl-Alt-T stopped working - Ubuntu 14.04

Solution 1:

I have also faced that type of problem earlier and initially used to restart.

But now any type of such problem, then by using following command:

kill -9 -1

This will kill processes and return to login screen, then after login all works well & successfully.

Solution 2:

It's a confirmed bug. https://bugs.launchpad.net/ubuntu/+source/gnome-terminal/+bug/1292113

I've had the same thing happening. Sometimes, after a minute or two of doing something else, a screen full of terminals I attempted to open with a series of frustrated ctrl+alt+ts blows up in my workspace.

If you go to launchpad, and confirm that it also affects you, it raises the priority of the bug, meaning it would be more likely to be fixed sooner.