Thanks. The crash report is not usable according to the robots, not sure why...
However your new prevboot.txt is useful and shows: Jan 09 11:40:31 ektorp /usr/lib/gdm3/gdm-x-session[3134]: (EE) Jan 09 11:40:31 ektorp /usr/lib/gdm3/gdm-x-session[3134]: (EE) Backtrace: Jan 09 11:40:31 ektorp /usr/lib/gdm3/gdm-x-session[3134]: (EE) 0: /usr/lib/xorg/Xorg (OsLookupColor+0x139) [0x555af506d7d9] Jan 09 11:40:31 ektorp /usr/lib/gdm3/gdm-x-session[3134]: (EE) 1: /lib/x86_64-linux-gnu/libpthread.so.0 (funlockfile+0x50) [0x7f69368f68df] Jan 09 11:40:31 ektorp /usr/lib/gdm3/gdm-x-session[3134]: (EE) 2: /usr/lib/xorg/modules/drivers/modesetting_drv.so (_init+0x6501) [0x7f6933be1251] Jan 09 11:40:31 ektorp /usr/lib/gdm3/gdm-x-session[3134]: (EE) 3: /usr/lib/xorg/Xorg (xf86RandR12Init+0x394) [0x555af4f8cae4] Jan 09 11:40:31 ektorp /usr/lib/gdm3/gdm-x-session[3134]: (EE) 4: /usr/lib/xorg/Xorg (xf86CrtcScreenInit+0x2b) [0x555af4f7f58b] Jan 09 11:40:31 ektorp /usr/lib/gdm3/gdm-x-session[3134]: (EE) 5: /usr/lib/xorg/modules/drivers/modesetting_drv.so (_init+0x3d0e) [0x7f6933bdbeee] Jan 09 11:40:31 ektorp /usr/lib/gdm3/gdm-x-session[3134]: (EE) 6: /usr/lib/xorg/Xorg (AddScreen+0xd7) [0x555af4f107e7] Jan 09 11:40:31 ektorp /usr/lib/gdm3/gdm-x-session[3134]: (EE) 7: /usr/lib/xorg/Xorg (InitOutput+0x3ce) [0x555af4f50c0e] Jan 09 11:40:31 ektorp /usr/lib/gdm3/gdm-x-session[3134]: (EE) 8: /usr/lib/xorg/Xorg (InitFonts+0x1dd) [0x555af4f1438d] Jan 09 11:40:31 ektorp /usr/lib/gdm3/gdm-x-session[3134]: (EE) 9: /lib/x86_64-linux-gnu/libc.so.6 (__libc_start_main+0xe7) [0x7f6936514b97] Jan 09 11:40:31 ektorp /usr/lib/gdm3/gdm-x-session[3134]: (EE) 10: /usr/lib/xorg/Xorg (_start+0x2a) [0x555af4efe1ea] Jan 09 11:40:31 ektorp /usr/lib/gdm3/gdm-x-session[3134]: (EE) Jan 09 11:40:31 ektorp /usr/lib/gdm3/gdm-x-session[3134]: (EE) Segmentation fault at address 0x30 Jan 09 11:40:31 ektorp /usr/lib/gdm3/gdm-x-session[3134]: (EE) Jan 09 11:40:31 ektorp /usr/lib/gdm3/gdm-x-session[3134]: Fatal server error: Jan 09 11:40:31 ektorp /usr/lib/gdm3/gdm-x-session[3134]: (EE) Caught signal 11 (Segmentation fault). Server aborting Jan 09 11:40:31 ektorp /usr/lib/gdm3/gdm-x-session[3134]: (EE) which seems to agree with comments #8-#10. ** Summary changed: - Gnome Xorg sessions fail to start with LDAP users (but Wayland or local users work) + Gnome Xorg sessions fail to start with LDAP users (but Wayland or local users work). Xorg crashes with SIGSEGV in ?? from _init() from xf86RandR12Init() from xf86CrtcScreenInit() ** Changed in: xorg-server (Ubuntu) Status: Incomplete => New -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1856846 Title: Gnome Xorg sessions fail to start with LDAP users (but Wayland or local users work). Xorg crashes with SIGSEGV in ?? from _init() from xf86RandR12Init() from xf86CrtcScreenInit() To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg-server/+bug/1856846/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs