I can confirm that this bug is not fixed. Today Ubuntu informed me of
20.04 and I started the distribution upgrade. I got the following
message:
"Could not install 'grub-pc'. The upgrade will continue but the 'grub-
pc' package may not be in a working state. Please consider a bug report
about it. Installed grub-pc package post-installation script subprocess
returned error exit status 1."
I can reboot normally and so far I can tell everything is working. When I do a
# apt autoremove I get the following error:
Reading package lists... Done
Building dependency tree
Reading state information... Done
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
2 not fully installed or removed.
After this operation, 0 B of additional disk space will be used.
Setting up grub-pc (2.04-1ubuntu26.4) ...
dpkg: error processing package grub-pc (--configure):
installed grub-pc package post-installation script subprocess returned error
exit status 1
dpkg: dependency problems prevent configuration of linux-crashdump:
linux-crashdump depends on grub-pc (>= 1.96+20090611-1ubuntu2) | grub-efi-ia32
| grub-efi-amd64 | grub (>= 0.97-29ubuntu24); however:
Package grub-pc is not configured yet.
Package grub-efi-ia32 is not installed.
Package grub-efi-amd64 is not installed.
Package grub is not installed.
dpkg: error processing package linux-crashdump (--configure):
dependency problems - leaving unconfigured
No apport report written because the error message indicates its a followup erro
r from a previous failure.
Errors were encountered while processing:
grub-pc
linux-crashdump
E: Sub-process /usr/bin/dpkg returned an error code (1)
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Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1891680
Title:
grub-pc needs to detect when debconf points to invalid drive and stop
in preinst, before unpacking files, and also treat this as a failure
in postinst
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