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Removal of the Lock/Switch Account menu in gnome desktop Ubuntu 14.04 LTS [duplicate]

We are looking for a way to remove the list of previously logged on users from the shutdown menu in Ubuntu 14.04 LTS running Gnome Classic Desktop. We have lots of computers in a lab environment where ...
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520 views

How to fix Ubuntu 12.04 display artefacts/freezes after switching users?

Some time ago I noticed a strange behaviour on my computer running Ubuntu 12.04. Here's a detailed description of the problem: I log into my account, work for some time, and then somebody else wants ...