I tried it on a qemu image for aarch64 and could not reproduce the probem, and there was no error in dmesg.
root@debian-arm64:/home/sudip# lsb_release -a No LSB modules are available. Distributor ID: Debian Description: Debian GNU/Linux 10 (buster) Release: 10 Codename: buster root@debian-arm64:/home/sudip# lscpu | grep Arch Architecture: aarch64 root@debian-arm64:/home/sudip# uname -r 4.19.0-8-arm64 root@debian-arm64:/home/sudip# export SANE_CONFIG_DIR=/etc/scanbd root@debian-arm64:/home/sudip# /usr/sbin/scanbd -f -c /etc/scanbd/scanbd.conf /usr/sbin/scanbd: dbus match type='signal',interface='org.freedesktop.Hal.Manager' /usr/sbin/scanbd: no devices, not starting any polling thread /usr/sbin/scanbd: Not Primary Owner (2) -- Regards Sudip