Thanks. Yes - I can see now that it is a gnome-shell segfault. Turning
off the gnome-shell extension dash-to-panel
(https://extensions.gnome.org/extension/1160/dash-to-panel/) resolves
the issue. I notice on the extension's page someone has also reported
the problem there. Workaround for now is to
Public bug reported:
Blank Screen initiates after timeout (usually 5 minutes but set to 1
minute to replicate this bug), screen goes blank on both laptop and
external Dell, but immediately comes back on. Whilst it is blanking, any
running applications show their windows (which is not usual) but
I have just upgraded from 11.10 to 12.04 and found exactly the same
issue.
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https://bugs.launchpad.net/bugs/965975
Title:
top panel font has wrong subpixeling
To manage notifications
Public bug reported:
Was just following the upgrade instructions from 11.04 to 11.10 and got
this error then it said the upgrade failed. I can now no loner seem to
update the system because it can't configure dictionary-common.
ProblemType: Package
DistroRelease: Ubuntu 11.10
Package:
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https://bugs.launchpad.net/bugs/874708
Title:
package dictionaries-common 1.11.5ubuntu1 failed to install/upgrade:
ErrorMessage: subprocess installed post-installation script
