Bug#961028: hplip: No scanner found: SANE cannot load the hpaio backend

[Jeffrey Ratcliffe <jffry@posteo.net>]

Package: hplip
Followup-For: Bug #961028

   * What led up to the situation?

Upgrade to 3.20.5+dfsg0-2

   * What exactly did you do (or not do) that was effective (or
     ineffective)?

scanimage -L

   * What was the outcome of this action?

No scanners found

   * What outcome did you expect instead?

device `hpaio:/usb/Officejet_6500_E709a?serial=MY01C3X12W05G3' is a Hewlett-
Packard Officejet_6500_E709a all-in-one
default device is `hpaio:/usb/Officejet_6500_E709a?serial=MY01C3X12W05G3'

which is what I get again, having downgraded to 3.20.3+dfsg0-2

As it says, this is with an OfficeJet 6500



-- Package-specific info:

-- System Information:
Debian Release: bullseye/sid
  APT prefers testing-debug
  APT policy: (500, 'testing-debug'), (500, 'unstable'), (500, 'testing')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 5.6.0-1-amd64 (SMP w/8 CPU cores)
Kernel taint flags: TAINT_PROPRIETARY_MODULE, TAINT_OOT_MODULE, TAINT_UNSIGNED_MODULE
Locale: LANG=en_GB.UTF-8, LC_CTYPE=en_GB.UTF-8 (charmap=UTF-8), LANGUAGE=en_GB:en (charmap=UTF-8)
Shell: /bin/sh linked to /usr/bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled

Versions of packages hplip depends on:
ii  adduser                3.118
ii  cups                   2.3.3-1
hi  hplip-data             3.20.3+dfsg0-2
ii  libc6                  2.30-8
ii  libcups2               2.3.3-1
ii  libdbus-1-3            1.12.16-2
hi  libhpmud0              3.20.3+dfsg0-2
ii  libpython3.8           3.8.3-1
ii  libsane                1.0.27-3.2+b1
hi  libsane-hpaio          3.20.3+dfsg0-2
ii  lsb-base               11.1.0
hi  printer-driver-hpcups  3.20.3+dfsg0-2
ii  python3                3.8.2-3
ii  python3-dbus           1.2.16-2
ii  python3-gi             3.36.0-3
ii  python3-pexpect        4.6.0-3
ii  python3-pil            7.0.0-4+b1
ii  python3-reportlab      3.5.34-1
ii  wget                   1.20.3-1+b2
ii  xz-utils               5.2.4-1+b1

Versions of packages hplip recommends:
ii  avahi-daemon                  0.8-1
ii  policykit-1                   0.105-26
hi  printer-driver-postscript-hp  3.20.3+dfsg0-2
ii  sane-utils                    1.0.27-3.2+b1

Versions of packages hplip suggests:
pn  hplip-doc              <none>
pn  hplip-gui              <none>
pn  python3-notify2        <none>
ii  system-config-printer  1.5.12-1

-- no debconf information