I just installed Ubuntu 18.04.3 and found the two-finger scrolling way too fast. So I followed the instructions in this thread and ran
sudo apt install xserver-xorg-input-synaptics
But that required
xserver-xorg-core, so I installed that as well. I rebooted and, once X started, I had no keyboard, but the mouse was working.
So I found this thread and it seemed very similar to my case. However, my grub menu boot allowed only for a recovery boot with no internet access. So, while I could remove the
xserver-xorg-input-synaptics, I had no way to reinstall the
I could still boot the machine, but maybe due to the above inability to reinstall, as soon as I logged in in X, I was thrown out again, to the login screen.
The second thread mentioned that ownership of
~/.Xauthority in my home folder could be the reason, but I had no such file!
In the end, I had to reinstall from the ISO – no big deal as it was a new install. I still have no
~/.Xauthority in my home folder. And now I'm quite hesitant to install input drivers – without any way to ssh into my machine, I'm helpless without a keyboard!