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Description of problem: First try to login after boot, desktop is XFCE with LightDM Version-Release number of selected component: lightdm-gtk-2.0.8-3.fc36 Additional info: reporter: libreport-2.17.1 backtrace_rating: 4 cgroup: 0::/user.slice/user-987.slice/session-c1.scope cmdline: /usr/sbin/lightdm-gtk-greeter crash_function: cairo_surface_get_type executable: /usr/sbin/lightdm-gtk-greeter journald_cursor: s=cab0925fe09c4049b4a4dab196b63856;i=1943;b=771448001baf4a329fac90597d2d5614;m=cd583351;t=5dfff87423771;x=e372d714e36023bd kernel: 5.17.5-300.fc36.x86_64 rootdir: / runlevel: N 5 type: CCpp uid: 987 Truncated backtrace: Thread no. 1 (10 frames) #0 cairo_surface_get_type at ../src/cairo-surface.c:222 #1 set_surface_as_root at /usr/src/debug/lightdm-gtk-2.0.8-3.fc36.x86_64/src/greeterbackground.c:1743 #2 greeter_background_save_xroot at /usr/src/debug/lightdm-gtk-2.0.8-3.fc36.x86_64/src/greeterbackground.c:1104 #3 start_session at /usr/src/debug/lightdm-gtk-2.0.8-3.fc36.x86_64/src/lightdm-gtk-greeter.c:2245 #4 _g_closure_invoke_va at ../gobject/gclosure.c:893 #7 handle_end_authentication at /usr/src/debug/lightdm-1.30.0-16.fc36.x86_64/liblightdm-gobject/greeter.c:716 #8 handle_message at /usr/src/debug/lightdm-1.30.0-16.fc36.x86_64/liblightdm-gobject/greeter.c:806 #9 from_server_cb at /usr/src/debug/lightdm-1.30.0-16.fc36.x86_64/liblightdm-gobject/greeter.c:920 #12 g_main_context_iterate.constprop.0 at ../glib/gmain.c:4211 #14 gtk_main at ../gtk/gtkmain.c:1329 Potential duplicate: bug 1394472
Created attachment 1888416 [details] File: backtrace
Created attachment 1888417 [details] File: core_backtrace
Created attachment 1888418 [details] File: cpuinfo
Created attachment 1888419 [details] File: dso_list
Created attachment 1888420 [details] File: environ
Created attachment 1888421 [details] File: exploitable
Created attachment 1888422 [details] File: limits
Created attachment 1888423 [details] File: maps
Created attachment 1888424 [details] File: mountinfo
Created attachment 1888425 [details] File: open_fds
Created attachment 1888426 [details] File: proc_pid_status
looks as the same issue from bug 1750557 ...
from /var/log/lightdm/seat0-greeter.log.old with an slightly instrumented greeter binary ... (lightdm-gtk-greeter:1421): Gtk-WARNING **: 13:31:41.786: Drawing a gadget with negative dimensions. Did you forget to allocate a size? (node menubar owner GreeterMenuBar) (lightdm-gtk-greeter:1421): Gtk-WARNING **: 13:31:41.803: Drawing a gadget with negative dimensions. Did you forget to allocate a size? (node menubar owner GreeterMenuBar) (lightdm-gtk-greeter:1421): Gtk-WARNING **: 13:31:41.820: Drawing a gadget with negative dimensions. Did you forget to allocate a size? (node menubar owner GreeterMenuBar) No protocol specified ** (lightdm-gtk-greeter:1421): WARNING **: 13:31:41.824: [Background] Failed to create root pixmap, screen=0x55b007468060, display=0x55b007460100, name=:0 which points to a failed XOpenDisplay() call (https://github.com/Xubuntu/lightdm-gtk-greeter/blob/master/src/greeterbackground.c#L1633) Seems the first login after boot always fails due a greeter crash, but the next ones are OK ...
Seems I am hitting the same issue on a RHEL-9 + EPEL-9 XFCE x86_64 system as well ...
https://bugs.launchpad.net/ubuntu/+source/lightdm-gtk-greeter/+bug/1422794/comments/9 gives some hints and yes, setting a static hostname with "hostnamectl" makes the problem go away
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