Error seems to be fixed. I have made the following solution:
# apt install --install-recommends linux-generic-hwe-18.04 xserver-xorg-hwe-18.04
Login as user/root in the text console (tty) with kernel 4.18.0-15 was possible without any problems.
My system: KDE Neon Useredition
Error seems to be fixed. I have made the following solution:
# apt install --install- recommends linux-generic- hwe-18. 04 xserver- xorg-hwe- 18.04
Login as user/root in the text console (tty) with kernel 4.18.0-15 was possible without any problems.
My system: KDE Neon Useredition