I have the same problem.
I can't re-install unity and have had to install gnome desktop.
--
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1749839
Title:
16.04: Installation of the 2/15/18 update to com
--
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1002118
Title:
package linux-tools-common (not installed) failed to install/upgrade:
trying to overwrite '/usr/bin/perf', which is also in package linu
Public bug reported:
Attempting to use the 'perf' command, which suggests installing linux-
base or linux-tools-common, a faliure occurs if either is chosen and the
'perf' command remains unavailable.
Distributor ID: Ubuntu
Description:Ubuntu 12.04 LTS
Release:12.04
Codename: pr
