Package: bluez Version: 5.50-1.2~deb10u1 In the case of upgrading or installing bluez for the first time on certain raspberry pi devices, a reboot may be required to apply the changes. We should add a check for this scenario in the postinst script.
I have included a patch that fixes this: diff -Nru bluez-5.50/debian/bluez.postinst bluez-5.50/debian/bluez.postinst --- bluez-5.50/debian/bluez.postinst 2020-03-22 04:55:38.000000000 -0500 +++ bluez-5.50/debian/bluez.postinst 2021-04-12 11:32:41.000000000 -0500 @@ -38,6 +38,23 @@ addgroup --quiet --system bluetooth fi + # If running on a raspberry pi and no bluetooth device is found + # a reboot will be required + if [ -f /proc/device-tree/model ] && grep -q 'Raspberry Pi' /proc/device-tree/model; then + if ! ( /usr/bin/hcitool dev | grep -q -E '\s(B8:27:EB:|DC:A6:32:)' ); then + echo "A reboot is required to re-intialize bluetooth devices." >&2 + echo "Please reboot the system when convenient." >&2 + + # trigger an update notification that recommends a reboot + # (used by unattended-upgrades etc.) + touch /var/run/reboot-required || true + + if ! grep -Fqsx bluez /run/reboot-required.pkgs; then + echo bluez >> /run/reboot-required.pkgs || true + fi + fi + fi + # reload dbus config file if [ -x /etc/init.d/dbus ]; then invoke-rc.d dbus force-reload || true