Package: gnome-settings-daemon Version: 3.38.1-2 Followup-For: Bug #971424 I'm still seeing this.
The workaround is to stop (remove) usbguard, then disable usb protection on any newly-attached devices: for x in /sys/bus/usb/devices/usb*/authorized_default; do echo 1 > $x; done and then authorize any currently-unauthorized devices with: for x in /sys/bus/usb/devices/[0-9]*/authorized; do echo 1 > $x; done -- System Information: Debian Release: 10.7 APT prefers stable-updates APT policy: (535, 'stable-updates'), (535, 'stable'), (520, 'testing'), (510, 'unstable'), (1, 'experimental') Architecture: i386 (i686) Kernel: Linux 4.19.0-9-686-pae (SMP w/1 CPU core) Locale: LANG=en_GB.UTF-8, LC_CTYPE=en_GB.UTF-8 (charmap=UTF-8), LANGUAGE=en_GB.UTF-8 (charmap=UTF-8) Shell: /bin/sh linked to /bin/dash Init: systemd (via /run/systemd/system) LSM: AppArmor: enabled