I've recently upgraded to Ubuntu 15.04. I have two displays (laptop + Samsung). At the beginning, both displays worked without any problem (using the nouveau-driver). I've changed to the NVIDIA driver and then the external monitor turns on for 2 or 3 seconds, showing the correct screen-image & resolution, and then turns black. The monitor is listed as active. No mouse nor launch bar are displayed. It is just pitch black. I reverted to nouveau again, but the problem persisted.

I have a Lenovo T510 with Nvidia GT218M. The external monitor is a Samsung Syncmaster. The monitors are detected without problem.

I don't see big errors in the logs. I tried the NVIDIA settings, xconf, removing monitors.xml, etc. but nothing seems to help.

It feels like whatever I do and save, is overridden after a few seconds by another process turning this monitor off again.

closed as off-topic by David Foerster, user364819, Zanna, Pilot6, Anwar May 13 '17 at 9:10

This question appears to be off-topic. The users who voted to close gave this specific reason:

  • "This describes a problem that can't be reproduced that seemingly went away on its own or was only relevant to a very specific period of time. It's off-topic as it's unlikely to help future readers." – David Foerster, Zanna, Pilot6, Anwar
If this question can be reworded to fit the rules in the help center, please edit the question.

  • 1
    Can you add the output of the command xrandr to your question? you can run this by going to the gnome-terminal program and typing it in and pressing enter. – Martin Owens -doctormo- Aug 31 '15 at 10:07
  • Any log information ? – Otto Nov 29 '16 at 16:46
  • this might be an issue with the gnome after upgrade. try reconfiguring the same and check – vembutech Dec 8 '16 at 17:37
  • Try these answers: askubuntu.com/questions/557488/… – Provided Apr 16 '17 at 16:49
  • This question has been asked a lot, here are some links to answers to try! askubuntu.com/questions/557488/… askubuntu.com/questions/623367/… Please tell me if any of these(and which one) worked. Also, when will it turn on for 3 seconds, after you plug it in, or when you turn on your computer? – Provided Apr 16 '17 at 16:54

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