Re: [gdm-list] greeter restart after using wrong username

[Francis Giraldeau <francis giraldeau revolutionlinux com>]

Hi Brian,

Brian Cameron a écrit :
> 
> Francis:
> 
>> I have a strange behavior, maybe someone already saw it.
>>
>> When using pam_ldap or pam_winbind by XDMCP, and entering a wrong
>> credential, GDM doesn't display the standard message "wrong username or
>> passord". In place of that, the greeter reset completely and reloads, as
>> if CTRL-ALT-Backspace was pressed.
>>
>> How can I do the debug of that?
>>
>> Have a nice day,
> 
> That is odd.  Try running gdmsetup, and turning on debug by checking
> the checkbox in the Security tab.  Then restart gdm by running
> gdm-restart as root (this will cause any running sessions to exit
> so don't run it with unsaved data in your running session).
> 
> Then share with us the "gdm" related messages that get sent to
> your syslog (/var/adm/messages or /var/log/messages) file.  This
> will probably highlight the problem.

Here it is:

Mar 5 11:12:27 mxapp1-1 gdm(pam_unix)[24581]: check pass; user unknown
Mar 5 11:12:27 mxapp1-1 gdm(pam_unix)[24581]: authentication failure;
logname= uid=0 euid=0 tty=10.113.2.67:0 ruser= rhost=10.113.2.67
Mar 5 11:12:27 mxapp1-1 gdm[24577]: gdm_cleanup_children: child 24581
crashed of signal 11
Mar 5 11:12:27 mxapp1-1 gdm[24577]: gdm_cleanup_children: Slave
crashed, killing its children

> Normally when the greeter restarts, it is because there was a crash.
> Is there a core file in your root (/) directory, or in /var/lib/gdm
> or /var/lib/log/gdm?  Sometimes gdm will leave core files here that
> we can check for a stacktrace.

I confirm you that I do have coredumps.

# file core.24977
core.24977: ELF 32-bit LSB core file Intel 80386, version 1 (SYSV),
SVR4-style, from 'P'

>From gdb:
Core was generated by `/usr/lib/gdmgreeter'.

But I have no debugging symbols. I will recompile it with debugging
enabled and will comes back with results. Thanks for the tip.

Have a nice day,

Francis