Installation for linux-firmware fails with "Read-only system" error

[Jean-Baptiste Lallement]

Mantic up to date.

During a package update, linux-firmware fails with:

Unpacking linux-firmware (20230915.gitdfa11466-0ubuntu1) over (20230815.git0e048b06-0ubuntu1) ...
dpkg: error processing archive /tmp/apt-dpkg-install-HAuVtE/00-linux-firmware_20230915.gitdfa11466-0ubuntu1_amd64.deb (--unpack):
 unable to create '/lib/firmware/1a98-INTEL-EDK2-2-tplg.bin.zst.dpkg-new' (while processing './lib/firmware/1a98-INTEL-EDK2-2-tplg.bin.zst'): Read-only file system
dpkg: error while cleaning up:
 unable to remove newly-extracted version of '/lib/firmware/1a98-INTEL-EDK2-2-tplg.bin.zst': Read-only file system
dpkg-deb: error: paste subprocess was killed by signal (Broken pipe)

[Dimitri John Ledkov (xnox)]

I believe it is a bug in boot-managed-by-snapd, because it should conflict on linux-firmware too.

On FDE installs /lib/firmware is mounted from the kernel snap, and must not be updated by any .deb packages.

Ditto any other packages that ship firmware. i.e. firmware-sof-signed

[Łukasz Zemczak (sil2100)]

Pushed to mantic, let's see if I didn't mess anything up.

[Launchpad Janitor (janitor)]

This bug was fixed in the package boot-managed-by-snapd - 3

---------------
boot-managed-by-snapd (3) mantic; urgency=medium

  * Conflict on the linux-firmware package as well (LP: #2036419).

 -- Łukasz 'sil2100' Zemczak <email address hidden> Wed, 20 Sep 2023 15:33:06 +0200

[Marcos Alano (mhalano)]

Got this same problem today, after sometime without updating my VM that uses FDE. I just updated the boot-managed-by-snapd package and now it's asking to remove the linux-firmware package, what is the correct approach I guess, but the removal always fail. How can I remove the package in the "hard way"?

[Marcos Alano (mhalano)]

Nevermind. For reference I used the solution from this page: https://stackoverflow.com/questions/48431372/removing-broken-packages-in-ubuntu