I had the same issue.
I found https://askubuntu.com/questions/992571/gui-unity-crashing-in-16-04-lts-after-updates-2018-01-04-compiz-segfaults first and followed the directions there. It resolved my problem.
I had the same issue.
I found https:/ /askubuntu. com/questions/ 992571/ gui-unity- crashing- in-16-04- lts-after- updates- 2018-01- 04-compiz- segfaults
first and followed the directions there. It resolved my problem.