From Bugzilla Helper:
User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.4.1) Gecko/20031014
Description of problem:
gdmflexiserver -n :1
While trying to start gdmflexiserver into a nested window with '-n'option, it
killed X session. Xnest works ok by itself, so it seems to be a gdm problem.
Tested on three machines, with several theme gdmgreeter/gdmlogin combinations
with same results (BTW, gdmsetup does not run from gdmgreeter/gdmlogin).
No debug info available [at least that could be found], except for some stuff in
Oct 24 02:22:05 linux gdm: GDM file gdm.c: line 2849 (N/A): Cannot run
setegid to 42
Oct 24 02:22:05 linux gdm(pam_unix): session closed for user my-user-name
Those two lines were logged each time I tested 'gdmflexiserver -n :1'
Fedora Core 0.95
nvidia_drv from NVIDIA-Linux-x86-1.0-4496
nv_drv driver from XFree86-4.3.0-40
nVidia Corporation NV18 [GeForce4 MX 440 AGP 8x] (rev a2)
nVidia Corporation NV11 [GeForce2 MX/MX 400] (rev a1)
nVidia Corporation NV5M64 [RIVA TNT2 Model 64/Model 64 Pro]
Version-Release number of selected component (if applicable):
Steps to Reproduce:
1. run gdmflexiserver -n or gdmflexiserver -n :1 from any X session (GNOME,
Actual Results: X Session is terminated
Expected Results: To open a nested gdm
This might correspond to GNOME bug report
<http://bugzilla.gnome.org/show_bug.cgi?id=127780>, in which case it
has already been fixed upstream.
Please locate the exact cvs commit URL containing this fix and it will
be considered for review in the future.
Fixed a while ago.