I rebooted and now when I log in, nothing but the wallpaper shows up.
I don't recall doing anything but installing Vivaldi lately, but I don't think that's it, so I don't know where to start.
I know it's pretty late already but I had the same problem and I solved it by uninstalling and reinstalling pantheon. You can access terminal at login screen by pressing ctl+alt+f1. Then login.
sudo apt-get remove pantheon
sudo apt-get install pantheon
and the reboot
I just tried installing Vivaldi and had unmet dependencies, so maybe it is the cause of problems after all?
Depending on where you are, you should be able to get to a terminal (called tty2 in this case) by pressing CtrlAltF2 or just AltF2. Login with your username and password.
To remove Vivaldi type
sudo apt-get remove vivaldi-preview. Then reboot with
sudo shutdown -r now and check if it works now.
As there is not much else known, you can also take a look in the log files by typing
dmesg -l emerg,alert,crit,err | less and post the output here. (There are also quite a lot of log files in
If there is no way to access the command line from your installed system an alternative is to use a live system, which will allow you to view, modify and delete the files on your harddrive. And also to make a backup of important data (especially
/home/) before trying anything dangerous.