Bug 451547

This is from a fresh install on a new-ish device, I saw in the interwebs that these files would come from fwupd-signed, but it's failing for some reason.

Here's the log of what I'm seeing. I can see the same problem in Discover.

$ fwupdmgr upgrade 
Devices with no available firmware updates: 
 • SA400S37480G
 • Thunderbolt host controller
 • UEFI Device Firmware
 • UEFI Device Firmware
 • UEFI dbx
Devices with the latest available firmware version:
 • Package level of Dell dock
 • RTS5413 in Dell dock
 • RTS5487 in Dell dock
 • VMM5331 in Dell dock
 • WD19TB
╔══════════════════════════════════════════════════════════════════════════════╗
║ Upgrade Embedded Controller from 0.1.14 to 0.1.21?                           ║
╠══════════════════════════════════════════════════════════════════════════════╣
║ Lenovo ThinkPad T480 System Firmware                                         ║
║                                                                              ║
║ Fixed an issue where ThinkVision T24m-10 monitor might not connected         ║
║ properly.                                                                    ║
║                                                                              ║
║ 20L6S81G17 must remain plugged into a power source for the duration of the   ║
║ update to avoid damage.                                                      ║
╚══════════════════════════════════════════════════════════════════════════════╝

Perform operation? [Y|n]: 
Downloading…             [***************************************]
Decompressing…           [***************************************]
Decompressing…           [***************************************]
Authenticating…          [***************************************]
Authenticating…          [***************************************]
/usr/libexec/fwupd/efi/fwupdx64.efi and /usr/libexec/fwupd/efi/fwupdx64.efi.signed cannot be found
marcia@Azerty:~$ LANG=C sudo apt install fwupd-signed 
Reading package lists... Done
Building dependency tree       
Reading state information... Done
Starting pkgProblemResolver with broken count: 1
Starting 2 pkgProblemResolver with broken count: 1
Investigating (0) fwupd-signed:amd64 < none -> 1.38+p20.04+trelease+git20210806.1326+1.5.11-0ubuntu1~20.04.2 @un puN Ib >
Broken fwupd-signed:amd64 Depends on fwupd:amd64 < 1.7.5-3~20.04.1 @ii mK NPb > (= 1.5.11-0ubuntu1~20.04.2)
Done
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:

The following packages have unmet dependencies:
 fwupd-signed : Depends: fwupd (= 1.5.11-0ubuntu1~20.04.2) but 1.7.5-3~20.04.1 is to be installed
E: Unable to correct problems, you have held broken packages.