** Changed in: livecd-rootfs (Ubuntu)
Status: Confirmed => Fix Released
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https://bugs.launchpad.net/bugs/2045418
Title:
Xenial grub-install fails on amd64 due to removed grub-pc-bin package
Status in livecd-rootfs package in Ubuntu:
Fix Released
Status in livecd-rootfs source package in Xenial:
Fix Released
Bug description:
I have found an interesting bug with grub on our cloud image builds
for xenial. During the build `grub-install --target=i386-pc
/dev/loop3` is called which calls `/usr/lib/grub/i386-pc/modinfo.sh`
and `/usr/lib/grub/i386-pc/modinfo.sh` is from package `grub-pc-bin`
but `grub2-common` which is where `grub-install` is from does not
depend on `grub-pc-bin` so this now fails with error
```
grub-install: error: /usr/lib/grub/i386-pc/modinfo.sh doesn't exist. Please
specify --target or --directory.
```
We are seeing this now on xenial as `grub-pc-bin` is now removed
during build as part of fixing bug LP#2036195 as `grub-pc-bin` is
being purged as an autoremovable package.
The reason `grub-pc-bin` is autoremovable is because the `grub-pc`
package was removed when `apt-get install -qqy grub-efi-amd64-signed
grub-efi-amd64 shim-signed` as `grub-efi-amd64` replaces `grub-pc`.
We are not seeing this on newer releases as `grub-pc` is still
installed, and thus, so too is `grub-pc-bin`
There were previous changes in this area [1] related to grub installs
which would have resolved this issue as part of LP#1901906 but they
were reverted for xenial [2][3]
Without making further grub changes the solution is to mark `grub-pc-
bin` as manually installed so even if `grub-pc` is removed the `grub-
pc-bin` is not marked autoremovable.
[1]
https://git.launchpad.net/livecd-rootfs/tree/live-build/ubuntu-cpc/hooks.d/base/disk-image-uefi.binary?h=eef7feef4a302c844d4c7fd1f8313e0bc188a104#n89
[2]
https://git.launchpad.net/livecd-rootfs/commit/?id=94cafd703d9167115be9ae73fffa70a661f05b7f
[3]
https://bugs.launchpad.net/ubuntu/+source/livecd-rootfs/+bug/1901906/comments/12
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