** Description changed:
- I used 14.04 for many years with this problem, but recently "upgraded"
- to 16.04.
+ I used 14.04 for many years *without* this problem, but recently
+ "upgraded" to 16.04.
Since then using multiple monitors causes X to randomly freeze.
After searching similar bugs I found that a "killall -9 compiz" from an
SSH login un-freezes it.
However, if the system gets into this state once, it happens more
frequently.
I found the problem occurred when using multiple workspaces on multiple
monitors, so I stopped using multiple workspaces.
To my surprise, the problem continued to happen.
So, the problem may be related multiple monitors.
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https://bugs.launchpad.net/bugs/1722448
Title:
16.04 VMware Guest Freezes - Killing compiz unfreezes
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