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I installed Ubuntu on to a laptop which has since been repurposed to be a family server. I disabled lightdm at startup by deleting /etc/init/lightdm.conf, since running an X server is a waste of resources I could otherwise put to a more server-y use (like filesystem cache or running some more virtual machines). However, this means that the laptop's built-in display is constantly left on, with plymouth animating its start-up animation, which burns a surprising amount of CPU and heats up the machine (since the display's backlight is on).

Switching to a virtual console works, but it still leaves plymouth running and leaves the monitor running.

Is there a way to tell plymouth that it's done, and that the display should sleep?

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You do know that there is a GUi-less server edition? –  Takkat Oct 11 '12 at 6:20
    
That doesn't help me for several reasons. First of all, on this particular server, I want to have a GUI environment available (for example, in a VNC server), and it makes sense to get started installing it. Second, I have already installed the system, and I would rather not reformat my hard drive just to toggle this one option. Third, what exactly is the difference between the "editions" besides package selection? I can't find this documented anywhere. –  Glyph Oct 11 '12 at 19:54
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