I upgraded to Ubuntu 17.10 but login is all messed up. Login is "command prompt", or whatever it's called. I have to type in my login credentials then startx to load desktop session.
I need a login manager to I can choose fallback environment. Whatever is default doesn't work right. Not full screen.
I did:
sudo dpkg-divert --remove /usr/share/dbus-1/system-services/org.freedesktop.systemd1.service
sudo apt-get update
sudo apt-get upgrade
to finish upgrade without systemd-shim error. And restored gdm3
sudo service gdm3 restart
Then installing drivers worked so was able to get my full screen resolution.
Note: using lightdm doesn't work. Couldn't login. There was login loop.
It appears as if a package may have been corrupted during the install.
First thing to try is to manually invoke gdm:
sudo service gdm restart
if this fails, look at the errors with:
sudo service gdm status
and post them, or continue with the other steps.
Most broken packages can be fixed with a simple:
sudo apt install -f
If apt install -f doesn't help, then try reinstalling gdm, the display manager:
sudo apt install --reinstall gdm
As I've personally haven't had much experience with Ubuntu 17.10, I'm not sure if this would work, but it's worth a shot:
sudo apt install lightdm
This will install lightdm, the display manager used before ubuntu switched to gdm.
There was a failure in gnome-packages of version 3.28.0 (3.28.1) which concerned gdm. Then gdm had cipher-salad. Apparently this looked like an attempt of attack where somebody tried to install ransomware.
In gnome-packages of version 3.28.2 this bug (ransomware?) is fixed.
You for Ubuntu would have to wait until next update of gnome-packages.
dpkg --reconfigure -a? and doing an autoremove? – Abel Tom May 24 '18 at 06:23