Public bug reported:

Disabling fprintd.service prevents boot.

System:  Ubuntu Desktop 22.04

Behavior:  Rebooting immediately after disabling and masking
fprintd.service, fails.

A series of [DEPEND] messages scroll past in tty1 early in the boot
process, too quickly to read but that appear to be mount units failing
for want of a dependency.  Consistently, the last message to appear in
tty1 is:

[  OK  ] Reached Target Printer Support

Expected behavior:  No disruption in boot process from the deletion of
an irrelevant service for which no hardware exists.

Unfortunately, no further information is available because the machine resists 
booting.
- While booted to a separate partition, I deleted the symlink in 
/etc/systemd/system to /dev/null, but boot failed thereafter in the same way.
- I chrooted into the partition to attempt to re-enable the unit but the 
command failed by reason of being in a chroot environment.
- The partition's syslog has no entries containing DEPEND, probably because 
they occurred before rsyslog could receive input from the kernel ring buffer.

** Affects: fprintd (Ubuntu)
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1975660

Title:
  Disabling fprintd.service prevents boot

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