Actually, the snapshotting/screencasting thread could also trigger it.
If that's still a thing...?
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
Mir/Unity8/USC crashes/freezes on nouveau (nv50) in pushbuf_kref()
especially with multiple monitors, webbrowser-app or system settings
To manage notifications about this bug go to:
ubuntu-bugs mailing list