I first installed Zorin a couple months ago. From the get-go, there seemed to be a couple things off about my installation: there wasn't any GUI wifi menu, and the power menu button took me to the login screen. I learned to use the Ubuntu network command line interface, and tolerated the latter issue. But now, power button problem has gotten worse. I was messing around, trying to fix my over-full OS disk by remounting /var onto a larger disk, and at some point the power menu button changed its behavior: now it seems like it logs me out and then instantly logs me back in. The 'lock' button next to it doesn't respond at all. Hitting ctrl-alt-delete also causes a log-out/log-in. Hitting the physical power button does seem to work as intended, as to the terminal commands 'reboot' and 'poweroff'. There aren't any issues on startup. I do have the system set to log me in automatically on startup.
I haven't noticed any other problems since tampering with the /var directory, which seems to have been successful.
Any help is appreciated. I'm a novice, so go easy on the jargon, please!