Thanks for your reply.
systemd-coredump installed. This is output of reportbug: -- System Information: Debian Release: 10.6 APT prefers stable-updates APT policy: (500, 'stable-updates'), (500, 'stable'), (10, 'unstable') Architecture: amd64 (x86_64) Kernel: Linux 5.8.0-0.bpo.2-amd64 (SMP w/16 CPU cores) Kernel taint flags: TAINT_PROPRIETARY_MODULE, TAINT_DIE, 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 gvfs-backends depends on: ii dconf-gsettings-backend [gsettings-backend] 0.30.1-2 ii gvfs 1.38.1-5 ii gvfs-common 1.38.1-5 ii gvfs-daemons 1.38.1-5 ii gvfs-libs 1.38.1-5 ii libarchive13 3.3.3-4+deb10u1 ii libavahi-client3 0.7-4+b1 ii libavahi-common3 0.7-4+b1 ii libavahi-glib1 0.7-4+b1 ii libc6 2.28-10 ii libcdio-cdda2 10.2+0.94+2-4 ii libcdio-paranoia2 10.2+0.94+2-4 ii libcdio18 2.0.0-2 ii libgcrypt20 1.8.4-5 ii libgdata22 0.17.9-3 ii libglib2.0-0 2.58.3-2+deb10u2 ii libgoa-1.0-0b 3.30.1-2 ii libgphoto2-6 2.5.22-3 ii libgphoto2-port12 2.5.22-3 ii libgudev-1.0-0 232-2 ii libimobiledevice6 1.2.1~git20181030.92c5462-2 ii libmtp9 1.1.16-2 ii libnfs12 3.0.0-2 ii libplist3 2.0.1~git20190104.3f96731-1 ii libpolkit-gobject-1-0 0.105-25 ii libsmbclient 2:4.9.5+dfsg-5+deb10u1 ii libsoup2.4-1 2.64.2-2 ii libusb-1.0-0 2:1.0.22-2 ii libxml2 2.9.4+dfsg1-7+b3 ii psmisc 23.2-1 Versions of packages gvfs-backends recommends: ii gnome-keyring 3.28.2-5 Versions of packages gvfs-backends suggests: pn bluez-obexd <none> pn samba-common <none> -- no debconf information