[Bug 2096979] [NEW] wireless-regdb update problem at Ubuntu 24.04.1 TPM-backed Full Disk Encryption setup

[Cihat Ertem]

Public bug reported:

I have an Ubuntu 24.04.1 TPM-backed Full Disk Encryption setup,  there
is a problem with last wireless-regdb update.

Whenever I try to update the system, I get this error:

The following packages will be upgraded:
  wireless-regdb
1 upgraded, 0 newly installed, 0 to remove and 19 not upgraded.
1 not fully installed or removed.
Need to get 0 B/7.058 B of archives.
After this operation, 1.024 B of additional disk space will be used.
Do you want to continue? [Y/n] 
(Reading database ... 131856 files and directories currently installed.)
Preparing to unpack .../wireless-regdb_2024.07.04-0ubuntu1~24.04.1_all.deb ...
Unpacking wireless-regdb (2024.07.04-0ubuntu1~24.04.1) over (2022.06.06-0ubuntu2) ...
dpkg: error processing archive /var/cache/apt/archives/wireless-regdb_2024.07.04-0ubuntu1~24.04.1_all.deb (--unpack):
 unable to create '/lib/firmware/regulatory.db.dpkg-new' (while processing './lib/firmware/regulatory.db'): Read-only file system
dpkg: error while cleaning up:
 unable to remove newly-extracted version of '/lib/firmware/regulatory.db': Read-only file system
Errors were encountered while processing:
 /var/cache/apt/archives/wireless-regdb_2024.07.04-0ubuntu1~24.04.1_all.deb
E: Sub-process /usr/bin/dpkg returned an error code (1)

I tried "sudo dpkg --purge --force-remove-reinstreq wireless-regdb" and got this error:
dpkg: warning: overriding problem because --force enabled:
dpkg: warning: package is in a very bad inconsistent state; you should
 reinstall it before attempting a removal
(Reading database ... 131856 files and directories currently installed.)
Removing wireless-regdb (2022.06.06-0ubuntu2) ...
dpkg: error processing package wireless-regdb (--purge):
 cannot remove '/lib/firmware/regulatory.db.p7s': Read-only file system
Processing triggers for man-db (2.12.0-4build2) ...
Errors were encountered while processing:
 wireless-regdb

I know snap pc-kernel has own firmware on immutable read-only filesystem. wireless-regdb package was on the system with no problem.
How can I uninstall the package? or is this a bug with lastest wireless-regdb against snap pc-kernel install?

** Affects: wireless-regdb (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: pc-kernel snap wireless-regdb

** Package changed: fwupd (Ubuntu) => wireless-regdb (Ubuntu)

** Tags added: wireless-regdb

** Tags added: pc-kernel snap

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https://bugs.launchpad.net/bugs/2096979

Title:
  wireless-regdb update problem at Ubuntu 24.04.1 TPM-backed Full Disk
  Encryption setup

Status in wireless-regdb package in Ubuntu:
  New

Bug description:
  I have an Ubuntu 24.04.1 TPM-backed Full Disk Encryption setup,  there
  is a problem with last wireless-regdb update.

  Whenever I try to update the system, I get this error:

  The following packages will be upgraded:
    wireless-regdb
  1 upgraded, 0 newly installed, 0 to remove and 19 not upgraded.
  1 not fully installed or removed.
  Need to get 0 B/7.058 B of archives.
  After this operation, 1.024 B of additional disk space will be used.
  Do you want to continue? [Y/n] 
  (Reading database ... 131856 files and directories currently installed.)
  Preparing to unpack .../wireless-regdb_2024.07.04-0ubuntu1~24.04.1_all.deb ...
  Unpacking wireless-regdb (2024.07.04-0ubuntu1~24.04.1) over (2022.06.06-0ubuntu2) ...
  dpkg: error processing archive /var/cache/apt/archives/wireless-regdb_2024.07.04-0ubuntu1~24.04.1_all.deb (--unpack):
   unable to create '/lib/firmware/regulatory.db.dpkg-new' (while processing './lib/firmware/regulatory.db'): Read-only file system
  dpkg: error while cleaning up:
   unable to remove newly-extracted version of '/lib/firmware/regulatory.db': Read-only file system
  Errors were encountered while processing:
   /var/cache/apt/archives/wireless-regdb_2024.07.04-0ubuntu1~24.04.1_all.deb
  E: Sub-process /usr/bin/dpkg returned an error code (1)

  I tried "sudo dpkg --purge --force-remove-reinstreq wireless-regdb" and got this error:
  dpkg: warning: overriding problem because --force enabled:
  dpkg: warning: package is in a very bad inconsistent state; you should
   reinstall it before attempting a removal
  (Reading database ... 131856 files and directories currently installed.)
  Removing wireless-regdb (2022.06.06-0ubuntu2) ...
  dpkg: error processing package wireless-regdb (--purge):
   cannot remove '/lib/firmware/regulatory.db.p7s': Read-only file system
  Processing triggers for man-db (2.12.0-4build2) ...
  Errors were encountered while processing:
   wireless-regdb

  I know snap pc-kernel has own firmware on immutable read-only filesystem. wireless-regdb package was on the system with no problem.
  How can I uninstall the package? or is this a bug with lastest wireless-regdb against snap pc-kernel install?

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