I was reading around here about how to fix a slow system. Like he says, for me everything after load average was like 5-7. So I tried using top to kill some of the biggest CPU hogs. One was Compiz. I killed Compiz which I understand now was stupid. I forget what happened exactly but I'm pretty sure everything went black. I tried rebooting, I can get to the login screen but when I log in I just go to a black screen, occasionally one icon might pop up, or the WiFi box will show but that's it. I tried getting into grub and was able to get to the command line a couple times. But now I can't even get to GRUB. I'm not sure what I would do there anyway. I also tried turning off secure boot. What should I do? I don't want to erase my stuff but I'm about to just re install Ubuntu.
Update: I am able to get to the console with ctr alt f1, I ran top and didn't see top, I ran pgrep compiz and got nothing. If I switch back using Ctrl+Alt+F7 I can see my mouse but nothing else. Checked out this post How can I restart Compiz from a TTY? (& Related, how can I set up a fallback WM?)
But when I run DISPLAY=:0
Unity it says:
compiz (core) - Loading plugin: composite
compiz (core) - starting plugin
compiz (core) - loading plugin: opnegl
compiz (core) - starting plugin: opengl
dconf - warning **: failed to commit changes to dconf: could not connect: connection refused.
DISPLAY=:0 compiz --replace
. – pbhj Feb 21 '19 at 10:37