I get lightdm-gtk-greeter crashing since last upgrade (possibly rebuild). I have recently switched my host to lib+lib64 (SYMLINK_LIB=no) multilib. $ sudo lightdm -d [+0.00s] DEBUG: Logging to /var/log/lightdm/lightdm.log [+0.00s] DEBUG: Starting Light Display Manager 1.21.0, UID=0 PID=28602 [+0.00s] DEBUG: Loading configuration dirs from /usr/share/lightdm/lightdm.conf.d [+0.00s] DEBUG: Loading configuration dirs from /usr/local/share/lightdm/lightdm.conf.d [+0.00s] DEBUG: Loading configuration dirs from /etc/xdg/lightdm/lightdm.conf.d [+0.00s] DEBUG: Loading configuration from /etc/lightdm/lightdm.conf [+0.00s] DEBUG: [LightDM] contains unknown option display-setup-script [+0.00s] DEBUG: Using D-Bus name org.freedesktop.DisplayManager [+0.00s] DEBUG: Registered seat module local [+0.00s] DEBUG: Registered seat module xremote [+0.00s] DEBUG: Registered seat module unity [+0.01s] DEBUG: Monitoring logind for seats [+0.01s] DEBUG: New seat added from logind: seat0 [+0.01s] DEBUG: Seat seat0: Loading properties from config section Seat:* [+0.01s] DEBUG: Seat seat0: Starting [+0.01s] DEBUG: Seat seat0: Creating greeter session [+0.01s] DEBUG: Seat seat0: Creating display server of type x [+0.01s] DEBUG: Could not run plymouth --ping: Failed to execute child process "plymouth" (No such file or directory) [+0.01s] DEBUG: Using VT 7 [+0.01s] DEBUG: Seat seat0: Starting local X display on VT 7 [+0.01s] DEBUG: XServer 1: Logging to /var/log/lightdm/x-1.log [+0.01s] DEBUG: XServer 1: Writing X server authority to /var/run/lightdm/root/:1 [+0.01s] DEBUG: XServer 1: Launching X Server [+0.01s] DEBUG: Launching process 28615: /usr/bin/X :1 -seat seat0 -auth /var/run/lightdm/root/:1 -nolisten tcp vt7 -novtswitch [+0.01s] DEBUG: XServer 1: Waiting for ready signal from X server :1 [+0.01s] DEBUG: Acquired bus name org.freedesktop.DisplayManager [+0.01s] DEBUG: Registering seat with bus path /org/freedesktop/DisplayManager/Seat0 [+0.02s] DEBUG: Loading users from org.freedesktop.Accounts [+0.02s] DEBUG: User /org/freedesktop/Accounts/User1001 added [+0.02s] DEBUG: User /org/freedesktop/Accounts/User1003 added [+0.03s] DEBUG: User /org/freedesktop/Accounts/User1002 added [+0.04s] DEBUG: User /org/freedesktop/Accounts/User1000 added [+1.75s] DEBUG: Got signal 10 from process 28615 [+1.75s] DEBUG: XServer 1: Got signal from X server :1 [+1.75s] DEBUG: XServer 1: Connecting to XServer :1 [+1.75s] CRITICAL: g_object_unref: assertion 'G_IS_OBJECT (object)' failed [+1.75s] DEBUG: Seat seat0: Display server ready, starting session authentication [+1.75s] DEBUG: Session pid=28646: Started with service 'lightdm-greeter', username 'root' [+2.02s] DEBUG: Session pid=28646: Authentication complete with return value 0: Success [+2.02s] DEBUG: Seat seat0: Session authenticated, running command [+2.02s] DEBUG: Session pid=28646: Running command /usr/sbin/lightdm-gtk-greeter [+2.02s] DEBUG: Creating shared data directory /var/lib/lightdm-data/root [+2.02s] DEBUG: Session pid=28646: Logging to /var/log/lightdm/seat0-greeter.log [+2.08s] DEBUG: Activating VT 7 [+2.08s] DEBUG: Activating login1 session 547 [+2.27s] DEBUG: Greeter connected version=1.21.0 resettable=false [+2.55s] DEBUG: Greeter closed communication channel [+2.55s] DEBUG: Session pid=28646: Exited with return value 139 [+2.55s] DEBUG: Seat seat0: Session stopped [+2.55s] DEBUG: Seat seat0: Stopping; failed to start a greeter [+2.55s] DEBUG: Seat seat0: Stopping [+2.55s] DEBUG: Seat seat0: Stopping display server [+2.55s] DEBUG: Sending signal 15 to process 28615 [+2.56s] DEBUG: Seat seat0 changes active session to [+2.73s] DEBUG: Process 28615 exited with return value 0 [+2.73s] DEBUG: XServer 1: X server stopped [+2.73s] DEBUG: Releasing VT 7 [+2.73s] DEBUG: XServer 1: Removing X server authority /var/run/lightdm/root/:1 [+2.73s] DEBUG: Seat seat0: Display server stopped [+2.73s] DEBUG: Seat seat0: Stopped [+2.73s] DEBUG: Required seat has stopped [+2.73s] DEBUG: Stopping display manager [+2.73s] DEBUG: Display manager stopped [+2.73s] DEBUG: Stopping daemon [+2.74s] DEBUG: Exiting with return value 1 $ sudo cat /var/log/lightdm/seat0-greeter.log ** Message: Starting lightdm-gtk-greeter 2.0.2 (Oct 18 2016, 14:13:55) ** Message: [Configuration] Reading file: /etc/lightdm/lightdm-gtk-greeter.conf ** (lightdm-gtk-greeter:28662): WARNING **: [PIDs] Failed to execute command: /usr/lib/at-spi2-core/at-spi-bus-launcher ** (lightdm-gtk-greeter:28662): WARNING **: [PIDs] Failed to execute command: upstart $ qlist at-spi | grep at-spi-bus /usr/libexec/at-spi-bus-launcher So it looks like it's looking for at-spi2-core in lib/ while we are installing it to libexec/.
I believe that the crash and the warning about at-spi-bus-launcher are separate issues. Warning should be fixed in this PR: https://github.com/gentoo/gentoo/pull/4627
