It looks like there is an extra ';;' in the script, the following patch
fixes it.
--- /tmp/grub-efi-amd64-signed.postinst 2020-04-09 16:50:58.585757438 -0700
+++ /var/lib/dpkg/info/grub-efi-amd64-signed.postinst 2020-04-09
16:51:12.029644653 -0700
@@ -16,7 +16,7 @@
case $1 in
configure)
- target=x86_64-efi
+ target=x86_64-efi ;;
# Check /boot/grub to see if we previously installed to an ESP. We don't
# want to trigger the install code just by installing the package,
# normally the installer installs grub itself first.
I do get a warning that "The GRUB boot loader was previously installed
to a disk that is no longer present, or whose unique identifier has
changed for some reason." I haven't changed the disks on my system or
done anything else that should trigger this.
** Also affects: grub (Ubuntu)
Importance: Undecided
Status: New
** Changed in: grub (Ubuntu)
Status: New => Confirmed
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https://bugs.launchpad.net/bugs/1871963
Title:
dpkg fails to install grub-efi-amd64 signed and shim-signed
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