Can someone affected by this please run
gsettings get org.compiz.core:/org/compiz/profiles/unity/plugins/core/ active-plugins
in a terminal and paste the output to this bug?
Also please attach your ~/.xsession-errors file.
Then try running
gsettings reset org.compiz.core:/org/compiz/profiles/unity/plugins/core/ active-plugins
and restarting/logging out and in to see if you get your session back.
Can someone affected by this please run
gsettings get org.compiz. core:/org/ compiz/ profiles/ unity/plugins/ core/ active-plugins
in a terminal and paste the output to this bug?
Also please attach your ~/.xsession-errors file.
Then try running
gsettings reset org.compiz. core:/org/ compiz/ profiles/ unity/plugins/ core/ active-plugins
and restarting/logging out and in to see if you get your session back.