Sometimes it hides the password field, then after a few minutes crash.
Other times it just hides the password field and sits there.
Each way, when you reboot the machine, the error above (lightdm crashed with SIGSEGV in realloc()) is raised and reported here.
ProblemType: Crash
DistroRelease: Ubuntu 13.04
Package: lightdm 1.5.2-0ubuntu1
ProcVersionSignature: Ubuntu 3.8.0-15.25-generic 3.8.4
Uname: Linux 3.8.0-15-generic i686
ApportVersion: 2.9.2-0ubuntu5
Architecture: i386
Date: Sun Mar 31 12:06:58 2013
ExecutablePath: /usr/sbin/lightdm
InstallationDate: Installed on 2013-02-28 (30 days ago)
InstallationMedia: Ubuntu 13.04 "Raring Ringtail" - Alpha i386 (20130228)
LightdmConfig:
[SeatDefaults]
user-session=ubuntu
greeter-session=unity-greeter
MarkForUpload: True
ProcCmdline: lightdm
ProcEnviron:
TERM=linux
PATH=(custom, no user)
SegvAnalysis:
Segfault happened at: 0xb72ce0ce: call 0xb73825e3
PC (0xb72ce0ce) ok
source "0xb73825e3" (0xb73825e3) ok
destination "(%esp)" (0xbf2a0ff0) not located in a known VMA region (needed writable region)!
SegvReason: writing unknown VMA
Signal: 11
SourcePackage: lightdm
StacktraceTop:
?? () from /lib/i386-linux-gnu/libc.so.6
realloc () from /lib/i386-linux-gnu/libc.so.6
?? () from /lib/i386-linux-gnu/libgcrypt.so.11
?? () from /lib/i386-linux-gnu/libgcrypt.so.11
gcry_realloc () from /lib/i386-linux-gnu/libgcrypt.so.11
Title: lightdm crashed with SIGSEGV in realloc()
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups:
Stacktrace:
#0 0xb72ce0ce in ?? ()
No symbol table info available.
Cannot access memory at address 0xbf2a0ff0
StacktraceTop: ?? ()