Bug 915986

Created attachment 703165 [details]
File: backtrace

Created attachment 703166 [details]
File: cgroup

Created attachment 703167 [details]
File: core_backtrace

Created attachment 703168 [details]
File: dso_list

Created attachment 703169 [details]
File: environ

Created attachment 703170 [details]
File: limits

Created attachment 703171 [details]
File: maps

Created attachment 703172 [details]
File: open_fds

Created attachment 703173 [details]
File: proc_pid_status

Created attachment 703174 [details]
File: var_log_messages

This bug appears to have been reported against 'rawhide' during the Fedora 19 development cycle.
Changing version to '19'.

(As we did not run this process for some time, it could affect also pre-Fedora 19 development
cycle bugs. We are very sorry. It will help us with cleanup during Fedora 19 End Of Life. Thank you.)

More information and reason for this action is here:
https://fedoraproject.org/wiki/BugZappers/HouseKeeping/Fedora19

Crashing in VM on cleanly installed F19:
lightdm-1.6.0-4.fc19.x86_64
lightdm-gtk-1.5.1-2.fc19.x86_64

The backtrace:


#1  0x0000000000405f17 in set_background (new_bg=new_bg@entry=0x0) at lightdm-gtk-greeter.c:1024
        p = 0x0
        screen = 0xbd2000
        c = 0xbeb880
        monitor = 1
        monitor_geometry = {x = 0, y = 0, width = 0, height = 0}
        bg = 0xbe3450
        i = 0

and the code:

static void
set_background (GdkPixbuf *new_bg)
{
  GdkRectangle monitor_geometry;
...
   for (monitor = 0; monitor < gdk_screen_get_n_monitors (screen); monitor++)
   {
     gdk_screen_get_monitor_geometry (screen, monitor, &monitor_geometry);

     if (bg)
     {  
        GdkPixbuf *p = gdk_pixbuf_scale_simple (bg, monitor_geometry.width,monitor_geometry.height, GDK_INTERP_BILINEAR);
        if (!gdk_pixbuf_get_has_alpha (p))
          p = gdk_pixbuf_add_alpha (p, FALSE, 255, 255, 255);
        gdk_cairo_set_source_pixbuf (c, p, monitor_geometry.x, monitor_geometry.y);
        g_object_unref (p);
     }



Seems gdk_screen_get_monitor_geometry call is returning a bogus 0x0 for some reason.  Cairo then hits error condition: CAIRO_STATUS_INVALID_STRIDE in ..._set_source

Going to try adding a check to

-if (bg)
+if (bg && (monitor_geometry.width>0) && (monitor_geometry.height>0))

which is, of course, only a workaround, but should fix the immediate problem

lightdm-gtk-1.5.1-3.fc19 has been submitted as an update for Fedora 19.
https://admin.fedoraproject.org/updates/lightdm-gtk-1.5.1-3.fc19

(In reply to comment #14)
> Going to try adding a check to
> 
> -if (bg)
> +if (bg && (monitor_geometry.width>0) && (monitor_geometry.height>0))
> 
> which is, of course, only a workaround, but should fix the immediate problem

Thanks, it does. I'm now able to login with lightdm-gtk-1.5.1-3.fc19.

Package lightdm-gtk-1.5.1-3.fc19:
* should fix your issue,
* was pushed to the Fedora 19 testing repository,
* should be available at your local mirror within two days.
Update it with:
# su -c 'yum update --enablerepo=updates-testing lightdm-gtk-1.5.1-3.fc19'
as soon as you are able to.
Please go to the following url:
https://admin.fedoraproject.org/updates/FEDORA-2013-7478/lightdm-gtk-1.5.1-3.fc19
then log in and leave karma (feedback).

I hit the bug, and confirmed the fix.

*** Bug 887507 has been marked as a duplicate of this bug. ***

lightdm-gtk-1.5.1-3.fc19 has been pushed to the Fedora 19 stable repository.  If problems still persist, please make note of it in this bug report.