*** This bug is a duplicate of bug 1866377 ***
https://bugs.launchpad.net/bugs/1866377
I ran into this bug too on Ubuntu MATE 20.04. After a reboot I was not
able to log back in at all.
I had to boot the PC through Live-USB, chroot into the system, and
applied Joseph C. Sible's workaround, which by the way worked perfectly.
Then I run:
`update-initramfs -c -k all`
and I was able boot back into the system.
Just in case if anyone is interested, some of the errors I ran into:
````
/etc/kernel/postinst.d/initramfs-tools:
update-initramfs: Generating /boot/initrd.img-5.5.8-050508-generic
cp: cannot create regular file
'/var/tmp/mkinitramfs_HrLIsw/usr/share/plymouth/themes/spinner/watermark.png':
No such file or directory
E: /usr/share/initramfs-tools/hooks/plymouth failed with return 1.
update-initramfs: failed for /boot/initrd.img-5.5.8-050508-generic with
1.
run-parts: /etc/kernel/postinst.d/initramfs-tools exited with return
code 1
dpkg: error processing package linux-image-unsigned-5.5.8-050508-generic
(--configure):
installed linux-image-unsigned-5.5.8-050508-generic package post-
installation script subprocess returned error exit status 1
Errors were encountered while processing: linux-image-
unsigned-5.5.8-050508-generic
E: Sub-process /usr/bin/dpkg returned an error code (1)
````
Thanks alot, Joseph.
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https://bugs.launchpad.net/bugs/1866372
Title:
Plymouth causes update-initramfs to fail
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