Package: lightdm Version: 1.26.0-7 Severity: normal Tags: upstream Control: -1 forwarded https://bugs.launchpad.net/lightdm/+bug/1894356
Dear Maintainer, 1. Add the following lines to /etc/lightdm/lightdm.conf [XDMCPServer] enabled=true and restart lightdm. 2. Login as a normal user from keyboard. 3. Login as the same user as 2 from XDMCP gives "Could not acquire name on session bus" and I cannot login from XDMCP. Without Step 2, XDMCP login succeeds. * The session is Mate. The same symptom is reported at https://github.com/neutrinolabs/xrdp/issues/1559#issuecomment-623977001 which recommends removal of "dbus-user-session" Debian package. I worked around the above issue by putting "unset DBUS_SESSION_BUS_ADDRESS" in /etc/X11/Xsession.d/ I believe this is an upstream issue and reported at https://bugs.launchpad.net/lightdm/+bug/1894356 I think that LightDM should not set DBUS_SESSION_BUS_ADDRESS when it starts a session. Best regards, Ryutaroh Matsumoto -- System Information: Debian Release: bullseye/sid APT prefers testing APT policy: (990, 'testing'), (500, 'unstable'), (1, 'experimental') Architecture: amd64 (x86_64) Kernel: Linux 5.7.0-3-amd64 (SMP w/2 CPU threads) Kernel taint flags: TAINT_FIRMWARE_WORKAROUND Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8), LANGUAGE not set Shell: /bin/sh linked to /usr/bin/dash Init: systemd (via /run/systemd/system) LSM: AppArmor: enabled Versions of packages lightdm depends on: ii adduser 3.118 ii dbus 1.12.20-1 ii debconf [debconf-2.0] 1.5.74 ii libaudit1 1:2.8.5-3+b1 ii libc6 2.31-3 ii libgcrypt20 1.8.6-2 ii libglib2.0-0 2.64.4-1 ii libpam-systemd [logind] 246.4-1 ii libpam0g 1.3.1-5 ii libxcb1 1.14-2 ii libxdmcp6 1:1.1.2-3 ii lightdm-gtk-greeter [lightdm-greeter] 2.0.8-1 ii lsb-base 11.1.0 Versions of packages lightdm recommends: pn xserver-xorg <none> Versions of packages lightdm suggests: ii accountsservice 0.6.55-3 ii upower 0.99.11-2 pn xserver-xephyr <none> -- Configuration Files: /etc/lightdm/lightdm.conf changed: [LightDM] start-default-seat=true remote-sessions-directory=/usr/share/lightdm/sessions:/usr/share/xsessions:/usr/share/wayland-sessions [Seat:*] [XDMCPServer] enabled=true [VNCServer] -- debconf information: * shared/default-x-display-manager: lightdm lightdm/daemon_name: /usr/sbin/lightdm