Same issue here. Using 15.04 for the past few weeks (migrated from 14.10, migrated from 14.04), everything worked perfectly. Then this morning, upon booting, Ctrl + Alrt + T didn't work. Neither did any of the "function" shortcuts of my laptop ( fn+ F5 and fn + F6 for Sound Up/Down, etc).
Restarting lightdm with "sudo service lightdm restart" fixed it for now.
Same issue here. Using 15.04 for the past few weeks (migrated from 14.10, migrated from 14.04), everything worked perfectly. Then this morning, upon booting, Ctrl + Alrt + T didn't work. Neither did any of the "function" shortcuts of my laptop ( fn+ F5 and fn + F6 for Sound Up/Down, etc).
Restarting lightdm with "sudo service lightdm restart" fixed it for now.