I've installed ubuntu-desktop on Ubuntu 16.04 Gnome and I picked lightdm and now once I restart, I get this error message when I press CTRL + ALT + F2.
A start job is running for Hold until boot process finishes up (Xmin Xs/no limit)
This will last for twenty minutes What should i do to fix this problem or even troubleshoot it?
You can fix this in following way, it worked for me. FYI : I had upgraded from 14.04 to 16.04.
Go in your safe mode by hitting SHIFT key or ESC. select networking , then drop to root prompt. Then run following commands.
sudo apt-get remove plymouth sudo apt-get remove xserver-xorg-video-intel
When you reboot, still you may get black or purple screen,
Ctrl+Alt+F1 and login with your username and password.
Then run the following commands
GDM ie Gnome display manager was also causing problems for me, so following step was essential for me
I switched to lightdm from gdm3 as display manager.
sudo apt-get install lightdm sudo dpkg-reconfigure lightdm
When you are prompted, select default display manager as lightdm
Now I was back with desktop , without dash or unity but only icons and wallpaper. now run this.
sudo apt-get install ubuntu-desktop
Now, reboot after this.
The desktop is back
now, you can install intel graphic drivers again,
sudo apt-get install xserver-xorg-video-intel
Reboot now. Its done!