Gdm produce segfault during bootup

[Alexander Kabakow]

After upgrade to 11.10 dgm works fine couple of days
Before this reboot i've installed kubuntu-full... may be thats the case

Oct 18 10:33:59 kabakov-laptop gdm-simple-slave[1016]: CRITICAL: gdm_session_direct_get_username: assertion `session != NULL' failed
Oct 18 10:33:59 kabakov-laptop kernel: [ 34.304042] show_signal_msg: 27 callbacks suppressed
Oct 18 10:33:59 kabakov-laptop kernel: [ 34.304048] gdm-simple-slav[1016]: segfault at 0 ip 00a2980e sp bfda6650 error 4 in libnss_compat-2.13.so[a26000+8000]
Oct 18 10:33:59 kabakov-laptop gdm-binary[991]: WARNING: GdmDisplay: display lasted 0.042391 seconds

Then i switching to first TTY, login, and manually starting kdm
I'am unity user for now, so i don't whant to set kdm as default, and want to use gdm instead

ProblemType: Bug
DistroRelease: Ubuntu 11.10
Package: gdm 3.0.4-0ubuntu11
ProcVersionSignature: Ubuntu 3.0.0-12.20-generic 3.0.4
Uname: Linux 3.0.0-12-generic i686
ApportVersion: 1.23-0ubuntu3
Architecture: i386
Date: Tue Oct 18 11:12:22 2011
InstallationMedia: Ubuntu 10.10 "Maverick Meerkat" - Release i386 (20101007)
ProcEnviron:
 PATH=(custom, user)
 LANG=en_US.UTF-8
 SHELL=/bin/zsh
SourcePackage: gdm
UpgradeStatus: Upgraded to oneiric on 2011-10-16 (1 days ago)

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.