Update: I installed 5.4.0-73 via update, grub config got updated but after reboot only
5.4.0-72 (the broken one)
4.15
4.4 (the uninstalled one)
appeared in the grub menu. After "reparing" the grub update (see: https://askubuntu.com/a/1207143), the machine boots into 5.4.0-73 without major issues. There are still a bunch of warnings but at least it starts.
Update: I installed 5.4.0-73 via update, grub config got updated but after reboot only
5.4.0-72 (the broken one)
4.15
4.4 (the uninstalled one)
appeared in the grub menu. After "reparing" the grub update (see: https:/ /askubuntu. com/a/1207143), the machine boots into 5.4.0-73 without major issues. There are still a bunch of warnings but at least it starts.