As you requested, the full output of sudo update-initramfs -u :
pim@pim:~$ sudo update-initramfs -u [sudo] password for pim: update-initramfs: Generating /boot/initrd.img-4.15.0-20-generic pim@pim:~$
After that the 30 second delay is still there.
The warning messages only appears when I manually remove the /etc/initramfs-tool/conf.d/resume file.
As you requested, the full output of sudo update-initramfs -u :
pim@pim:~$ sudo update-initramfs -u img-4.15. 0-20-generic
[sudo] password for pim:
update-initramfs: Generating /boot/initrd.
pim@pim:~$
After that the 30 second delay is still there.
The warning messages only appears when I manually remove the /etc/initramfs- tool/conf. d/resume file.