Can't run unity or gnome-shell

[Jack Leigh]

Just upgraded to quantal beta 1
Unity never loads from lightdm, screen just flashes at random intervals.
Was able to load gnome-shell from gdm but it is pretty much unusable due to visual artifacts.
MATE loads fine.

ProblemType: Bug
DistroRelease: Ubuntu 12.10
Package: xorg 1:7.7+1ubuntu3
ProcVersionSignature: Ubuntu 3.2.0-30.48-generic-pae 3.2.27
Uname: Linux 3.2.0-30-generic-pae i686
ApportVersion: 2.5.1-0ubuntu7
Architecture: i386
Date: Fri Sep 7 15:48:53 2012
DistUpgraded: 2012-09-07 14:33:30,375 DEBUG enabling apt cron job
DistroCodename: quantal
DistroVariant: ubuntu
GraphicsCard:
 Intel Corporation Mobile 945GM/GMS, 943/940GML Express Integrated Graphics Controller [8086:27a2] (rev 03) (prog-if 00 [VGA controller])
   Subsystem: Toshiba America Info Systems Device [1179:ff10]
   Subsystem: Toshiba America Info Systems Device [1179:ff10]
InstallationMedia: Ubuntu 9.10 "Karmic Koala" - Release i386 (20091028.5)
MachineType: TOSHIBA Satellite A100
PccardctlIdent:
 Socket 0:
   no product info available
PccardctlStatus:
 Socket 0:
   no card
ProcEnviron:
 LANGUAGE=en_GB:en
 TERM=xterm
 PATH=(custom, no user)
 LANG=en_GB.UTF-8
 SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.2.0-30-generic-pae root=UUID=d1c27540-49ad-4002-8a84-9eba9c413cf1 ro quiet splash vt.handoff=7
SourcePackage: xorg
UpgradeStatus: Upgraded to quantal on 2012-09-07 (0 days ago)
dmi.bios.date: 07/12/2007
dmi.bios.vendor: Phoenix Technologies LTD
dmi.bios.version: 6.00
dmi.board.name: CAPELL VALLEY(NAPA) CRB
dmi.board.vendor: Intel Corporation
dmi.board.version: Not Applicable
dmi.chassis.asset.tag: No Asset Tag
dmi.chassis.type: 1
dmi.chassis.vendor: No Enclosure
dmi.chassis.version: N/A
dmi.modalias: dmi:bvnPhoenixTechnologiesLTD:bvr6.00:bd07/12/2007:svnTOSHIBA:pnSatelliteA100:pvrPSAANE-02C02EEN:rvnIntelCorporation:rnCAPELLVALLEY(NAPA)CRB:rvrNotApplicable:cvnNoEnclosure:ct1:cvrN/A:
dmi.product.name: Satellite A100
dmi.product.version: PSAANE-02C02EEN
dmi.sys.vendor: TOSHIBA
version.compiz: compiz 1:0.9.8.0-0ubuntu1
version.libdrm2: libdrm2 2.4.39-0ubuntu1
version.libgl1-mesa-dri: libgl1-mesa-dri 9.0~git20120903.e1673d20-0ubuntu1
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 9.0~git20120903.e1673d20-0ubuntu1
version.xserver-xorg-core: xserver-xorg-core 2:1.13.0-0ubuntu1
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.7.3-0ubuntu1
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:6.99.99~git20120713.6ef1ad6a-0ubuntu1
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.20.6-0ubuntu1
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.1-4~ubuntu1