Lightdm-Coredump

Nov 30 18:12:28 ThinkpadL13Yoga lightdm[1981]: pam_unix(lightdm-greeter:session): session opened for user lightdm(uid=969) by (uid=0)
Nov 30 18:12:28 ThinkpadL13Yoga systemd-logind[935]: New session c7 of user lightdm.
Nov 30 18:12:28 ThinkpadL13Yoga systemd[1]: Started Session c7 of User lightdm.
Nov 30 18:12:28 ThinkpadL13Yoga systemd-coredump[1995]: Process 1985 (lightdm-gtk-gre) of user 969 terminated abnormally with signal 6/ABRT, processing...
Nov 30 18:12:29 ThinkpadL13Yoga systemd-coredump[1996]: Process 1985 (lightdm-gtk-gre) of user 969 dumped core.
                                                        #48 0x000064d11ed3b257 n/a (lightdm-gtk-greeter + 0xf257)
                                                        #49 0x000064d11ed3d1e1 greeter_background_connect (lightdm-gtk-greeter + 0x111e1)
                                                        #50 0x000064d11ed370b5 main (lightdm-gtk-greeter + 0xb0b5)
                                                        #53 0x000064d11ed381b5 _start (lightdm-gtk-greeter + 0xc1b5)
Nov 30 18:12:29 ThinkpadL13Yoga lightdm[1981]: pam_unix(lightdm-greeter:session): session closed for user lightdm
Nov 30 18:12:29 ThinkpadL13Yoga systemd[1]: lightdm.service: Main process exited, code=exited, status=1/FAILURE
Nov 30 18:12:29 ThinkpadL13Yoga systemd[1]: lightdm.service: Failed with result 'exit-code'.
Nov 30 18:12:30 ThinkpadL13Yoga systemd[1]: lightdm.service: Scheduled restart job, restart counter is at 7.