Same problem here, the pointing stick/trackpoint does not work.
MachineType: HP HP EliteBook 850 G7 Notebook PC
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-5.8.0-33-generic
root=/dev/mapper/vgxubuntu-root ro quiet splash psmouse.proto=bare
SourcePackage: xserver-xorg-input-libinput
Package: xserver-xo
#all in one manual fix for Ubuntu 14.04 with zsh-5.0.2 (based on
mchelen's one-liner):
# get zsh tar file and uncompress its Doc folder to /usr/share/man/man1
wget -qO-
"http://downloads.sourceforge.net/project/zsh/zsh/5.0.2/zsh-5.0.2.tar.gz?r=http%3A%2F%2Fsourceforge.net%2Fprojects%2Fzsh%2Ffiles