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I had 14.04 until two days ago. Finally decided to do release upgrade to 16.04 and here we go - I ended up with missing display environment when starting with systemd. Good thing is that using upstart everything works fine.

It was saying: error opening display

I suspect two things in my configuration:

  1. My video card and driver? I am using: GeForce GT 630 with NVIDIA Driver Version: 375.66 from the official nvidia web.
  2. I have installed Mac theme from here:

http://www.noobslab.com/2014/04/macbuntu-1404-pack-is-released.html

No matter what i do if I switch to anything different then lightdm - it never runs, not even with upstart. I tried with lightDM and gdm3 - no luck at all. lightdm at least brings me to command line login, the other freezes at ubuntu loading dots (dots are moving but that's all).

Last two days I spent a lot of time trying to make this work, with no success at all. Any help would be highly appreciated.

Thank you for your time reading this!

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  • in those two days you could have copied your home to another drive or removable drive reinstalled with a live USB and reconfigured to your licking and finalized with non-home app instalations with probably alot of time to spare. :-) anyways have you tried unistalling nvidia driver and installing nvidia driver following this guide : linuxconfig.org/…? After this rerun updates and see if you need to install manually some core ubuntu packages that failed to install. tell me if this helps.
    – tatsu
    May 12, 2017 at 10:07
  • I did this Nvidia driver thing already. Just to make sure - I did it again now too... With systemd I got ubuntu loading logo and then 5 cool red dots hanging on my screen. That's all. Sorry.
    – Lou Cifer
    May 12, 2017 at 10:48
  • after the five dots could you do ctrl-alt-F5 ? if that works login and see what you can run from there? or is that already what you're doing?
    – tatsu
    May 12, 2017 at 11:47
  • screenshot Not sure what else to try. Not that good with linux..
    – Lou Cifer
    May 12, 2017 at 12:38
  • ok so i imagine that's what you were already doing. does sudo apt update && sudo apt dist-upgrade work? if yes if you haven't already, run the commands from the guide I linked to install the correct nvidia drive then also try these for kicks sudo apt-get install unity unity-scope-askubuntu unity-lens-applications unity-webapps-bbcnews unity-greeter ubuntu-desktop sudo apt-get install --install-recommends indicator-applet-complete
    – tatsu
    May 12, 2017 at 13:26

1 Answer 1

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I am placing the answer here in case anyone has the same problem:

Finally resolved. I've noticed I always had read only file system after systemd startup. It turns out that my fstab primary disk UUID was somehow messed up - interesting upstart had no problem with this..nor I had any troubles before upgrading from 14.04. So I just replaced it with the correct UUID and now it works just fine.

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