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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.
slava
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MadMax
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    https://askubuntu.com/a/31171/29073 should fix it: DISPLAY=:0 compiz --replace. – pbhj Feb 21 '19 at 10:37
  • Ran that command but it is not returning, Now I can see a single file that was on my desktop but nothing else, everything else is black. – MadMax Feb 21 '19 at 17:24
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    Did you try anything else from the link I gave? – pbhj Feb 24 '19 at 09:53
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    Yea! I tried a bunch of things, I think it was the --replace unity that finally fixed it. – MadMax Feb 24 '19 at 19:32

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