Ubuntu-desktop isn't an essential package for my distro, but it might've helped. Sudo apt install ubuntu-desktop -f -y -reinstall -fix-missingĪs ubuntu-desktop is an essential package for your distro and it wouldn't install a package already there. I think it's possible that sddm overwrote/edited essential files to desktop management. For viewing/editing text in console I prefer using sudo nano datfile. (Once done with it you can leave with ctrl + alt + F1). Here's what I tried:Īt the login screen, open TTY with ctrl + alt + F6. When I tried KDE, it showed an error saying it couldn't write to, I believe. Trying Gnome or Gnome with Wayland would kick me out too. Preface: my desktop environment is Plasma/KDE. Unfortunately I didn't document the solution/process well enough to know what fixed it, so this is a shotgun approach. I actually just ran into the same exact issue as you after installing and subsequently uninstalling sddm. In reply to your comment: the steps to take for a graphics problem is in the latter half. You could try entering recovery mode to change the default display manager there, or if you're using Nvidia trying different Nouveau settings in GRUB ( nouveau.modeset=0 or nomodeset). Is it possible you've installed a display manager that isn't compatible with your graphics drivers? I've read that 18.04/18.10 has been causing a lot of trouble in regards to booting up/entering desktop, although more specifically for Nvidia graphics cards.
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