[power]: gnome-settings-daemon crashed with SIGSEGV in engine_update_composite_device()

[ventcrazy]

booted ubuntu 12.04 from usb, and then tried to install ubuntu. Got an error message

ProblemType: Crash
DistroRelease: Ubuntu 12.04
Package: gnome-settings-daemon 3.3.92-0ubuntu2
ProcVersionSignature: Ubuntu 3.2.0-20.33-generic-pae 3.2.12
Uname: Linux 3.2.0-20-generic-pae i686
ApportVersion: 1.95-0ubuntu1
Architecture: i386
CasperVersion: 1.312
CrashCounter: 1
Date: Fri Apr 13 06:08:43 2012
ExecutablePath: /usr/lib/gnome-settings-daemon/gnome-settings-daemon
LiveMediaBuild: Ubuntu 12.04 LTS "Precise Pangolin" - Beta i386 (20120328)
ProcCmdline: /usr/lib/gnome-settings-daemon/gnome-settings-daemon
ProcEnviron:
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SegvReason: reading NULL VMA
Signal: 11
SourcePackage: gnome-settings-daemon
Title: [power]: gnome-settings-daemon crashed with SIGSEGV in g_cclosure_marshal_VOID__OBJECTv()
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo

[Apport retracing service (apport)]

StacktraceTop:
 engine_update_composite_device (manager=0x999f800, original_device=0x999fa28) at gsd-power-manager.c:844
 engine_device_changed_cb (client=0x9992408, device=0x999fa28, manager=0x999f800) at gsd-power-manager.c:1830
 g_enum_complete_type_info (g_enum_type=2, info=0xb52b1158, const_values=0xb52b0da8) at /build/buildd/glib2.0-2.32.0/./gobject/genums.c:288
 ?? ()