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My laptop GPU integrated is: Intel HD Graphics 3000 Sandybridge. The dedicated one is Nvidia Geforce GT 630M 2GB.

I installed Ubuntu Gnome 15.10 on this laptop. I installed all the updates from the software updater. Then I restarted the PC. I selected as additional driver the the Nvidia binary driver - version 352.63 (proprietary, tested). Then I restarted the PC. I downloaded and installed Intel Graphics installer from here: https://01.org/linuxgraphics/downloads/intel-graphics-installer-linux-1.2.1. After installation I updated. Then I restarted the PC. As primary GPU I use the Intel.

However, after all this, I got from time to time some grey screens for 2-5 seconds and then it comes back, even when I use as primary GPU the Nvidia one.

How can I solve this problem? Please HELP!

PS: I am new GNU/Linux user. Thank you!

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  • Go to ttyl1 and try sudo prime-select intel
    – ArcaneDominion
    Feb 2, 2016 at 20:27
  • Info: the current alternatives in use are: ['nvidia-352-prime', 'nvidia-352-prime'] Info: the intel profile is already in use
    – Daniel
    Feb 2, 2016 at 20:31
  • Sudo service lightdm restart
    – ArcaneDominion
    Feb 2, 2016 at 20:32
  • Failed to restart lightdm.service: Unit lightdm.service failed to load: No such file or directory.
    – Daniel
    Feb 2, 2016 at 20:39
  • Sudo apt-get install - -reinstall lightdm
    – ArcaneDominion
    Feb 2, 2016 at 20:40

1 Answer 1

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As stated in the comments, 

sudo apt-get install --reinstall lightdm 

sudo service lightdm restart
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  • i think the problem is solved, can you explain to me what happened with that command? what did it changed and what was the problem before that? thank you again!
    – Daniel
    Feb 3, 2016 at 0:04
  • One of the components of your lightdm package was corrupted, likely deleted by some other operation.
    – ArcaneDominion
    Feb 3, 2016 at 8:46
  • oh... well that is so stupid because grey screens started after the clean install...
    – Daniel
    Feb 3, 2016 at 9:15
  • Hello again, it seems the lightdm didn t worked because the problems are back, specially when I open multiple chrome tabs with videos like youtube videos. Any other ideea? thank you!
    – Daniel
    Feb 5, 2016 at 20:45
  • Your graphics card is probably crashing.
    – ArcaneDominion
    Feb 5, 2016 at 20:47

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