Xubuntu 14.04 black screen after monitor off/on

Posted by Sampo Smolander on Ask Ubuntu See other posts from Ask Ubuntu or by Sampo Smolander
Published on 2014-06-05T09:04:43Z Indexed on 2014/06/05 9:43 UTC
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xubuntu

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monitor

I have a HP desktop machine with Ubuntu 14.04, with also Xubuntu and Gnome desktops installed. I mostly use the Xubuntu session.

When using the Xubuntu session, when I power off my monitor, and power it back on, the screen stays black and I cannot do any work. With ctrl-alt-f6 I can open another virtual terminal, and then the screen works again, but if I to go back to the desktop session with ctrl-alt-f7, all I have is a black screen.

But, if I login to Unity (the Ubuntu default session), or to Gnome, and turn the monitor off and back on, everything works ok. Also, if I log out, and while in the lightdm greeter, turn the monitor off and back on, everything works ok.

What could be the cause for this, and how to fix this?

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