This bug was fixed in the package libfprint - 1:1.90.2+tod1-0ubuntu1

---------------
libfprint (1:1.90.2+tod1-0ubuntu1) groovy; urgency=medium

  * New upstream release
    - Fixed crash in VFS0050 (LP: #1876502)
    - Enrollment fails with UPEK reader (LP: #1881380)
    - Lots of various drivers fixes
    - As per a patch for nbis required for some sensors that was accidentally
      dropped in an earlier release. Users of sensors/drivers aes1610, aes2501,
      aes2550, aes1660, aes2660, elan, upektc_img) need to re-enroll
  * d/p/git_reading_pointer.patch:
    - Dopped (applied upstream)
  * debian/control: Add missing libfprint-2-tod-dev dependencies (LP: #1884267)
  * debian/rules: Be strictier about symbol changes
  * libfprint-2-tod1.symbols: Add new TOD symbols

 -- Marco Trevisan (Treviño) <ma...@ubuntu.com>  Fri, 19 Jun 2020
17:38:55 +0200

** Changed in: libfprint (Ubuntu)
       Status: Fix Committed => Fix Released

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https://bugs.launchpad.net/bugs/1881380

Title:
  fprintd-enroll fails on fresh install of xubuntu 20.04 with an USB
  UPEK reader

Status in libfprint:
  Fix Committed
Status in libfprint package in Ubuntu:
  Fix Released
Status in libfprint source package in Focal:
  Fix Committed

Bug description:
  [ Impact ]

  The fingerprint reader is an UPEK TCRE3C usb fingerprint reader. It
  was working fine with ubuntu 16.04 and 18.04.

  [ Test case ]

  With an UPEK fingerprint reader run:
   - fprintd-enroll

  Enrollment should work properly

  [ Regression potential ]

  Fingers are not enrolled (not that now they are :))

  ----

  lsusb shows:

  0483:2016 STMicroelectronics Fingerprint Reader

  user@xubuntu:~$ fprintd-enroll
  Using device /net/reactivated/Fprint/Device/0
  failed to claim device: Open failed with error: transfer timed out

  user@xubuntu:~$ fprintd-list user
  found 1 devices
  Device at /net/reactivated/Fprint/Device/0
  Using device /net/reactivated/Fprint/Device/0
  User user has no fingers enrolled for UPEK TouchStrip.

  This bug is probably the same as:

  https://bugzilla.redhat.com/show_bug.cgi?id=1832229

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