"sudo unity restart" won't work, because Unity isn't a sysvinit service
or something. If you want to restart unity, run unity --replace OR unity
--reset (use the latter to revert to default Unity and Compiz settings).
As for sudo service gdm restart, why doesn't it work? It would work only
in a terminal, because sudo needs an stdin input pipe so that you could
enter the password. It won't work inside Unity Alt+F2.
I'm closing these bugs, since these aren't related to Unity.
** Changed in: unity
Status: New => Invalid
** Changed in: gdm (Ubuntu)
Status: New => Invalid
** Changed in: unity (Ubuntu)
Status: New => Invalid
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https://bugs.launchpad.net/bugs/796426
Title:
"sudo service gdm restart" and "sudo unity restart" does not work.
System freezes instead.
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