Whenever I suspend and resume my laptop I get the following screen (see link to image below). I can do Ctrl+Alt+F1 to get to TTY and I can kill and restart Unity but it seems to have no effect when I try to go back using Ctrl+Alt+F7. Interestingly this only happens when I don't have my secondary monitor plugged in. When the secondary monitor is plugged in the system resumes to the GUI fine.
I looked at
/var/log/pm-suspend.log and didn't see any errors or anything that jumped out as suspicious. Has anyone else experience this or know where I can look to diagnose the issue?
sudo dmidecode | grep -i MacBook Product Name: MacBookPro8,2 Family: MacBook Pro Version: MacBookPro8,2
When the computer resumes music that had been playing when I suspended the computer will resume playing. So I believe it is resuming correctly it's just the graphics that are getting messed up for some reason.
EDIT: A workaround that seems to work is to plug in my external monitor and then login. However carrying around my external monitor and a power source would be extremely inconvenient :) but hopefully this gives a clue to what's actually going on.
Also doing this causes my main display's desktop to be black. While I can drag windows onto my main monitor and my toolbar works (using cinnamon) the background image does not appear (it flickers on then off when i try to change the background). I also cannot right click on my main monitor background but I can on my secondary (laptop) background.
Killing and restarting cinnamon does not fix the background issue either.