header_postinst.d/dkms exited with return code 4

Error

/etc/kernel/header_postinst.d/dkms:
Error! Could not locate dkms.conf file.
File:  does not exist.
run-parts: /etc/kernel/header_postinst.d/dkms exited with return code 4

Lösung

for i in /var/lib/dkms/*/[^k]*/source; do [ -e "$i" ] || echo "$i";done

Output:        /var/lib/dkms/******-123/340.106/source

sudo rm -Rf /var/lib/dkms/******-123/340.106/source
sudo apt upgrade