Blank screen at startup, only mouse pointer is visible.

Maverick Beta (15-09-2010 build) live cd.

1) Ubiquity appears.
2) I select Try Ubuntu
3) I get a black screen with only the mouse pointer visible.

Looking at the kernel log:

[drm:rs400_gart_adjust_size] *ERROR* Forcing to 32M GART size (because of ASIC bug ?)

This is the same error reported in bug #562843

ProblemType: Bug
DistroRelease: Ubuntu 10.10
Package: linux-image-2.6.35-20-generic 2.6.35-20.29
Regression: No
Reproducible: Yes
ProcVersionSignature: Ubuntu 2.6.35-20.29-generic 2.6.35.4
Uname: Linux 2.6.35-20-generic i686
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.23.
Architecture: i386
AudioDevicesInUse:
 Cannot stat file /proc/13809/fd/21: Stale NFS file handle
 Cannot stat file /proc/13906/fd/21: Stale NFS file handle
 Cannot stat file /proc/13908/fd/21: Stale NFS file handle
                      USER PID ACCESS COMMAND
 /dev/snd/controlC0: ubuntu 3630 F.... pulseaudio
CRDA: Error: [Errno 2] No such file or directory
Card0.Amixer.info:
 Card hw:0 'IXP'/'ATI IXP rev 2 with AD1986 at 0xfebfcc00, irq 17'
   Mixer name : 'Analog Devices AD1986'
   Components : 'AC97a:41445378'
   Controls : 44
   Simple ctrls : 32
Card1.Amixer.info:
 Card hw:1 'Modem'/'ATI IXP Modem rev 2 at 0xfebfc800, irq 17'
   Mixer name : 'Conexant id 23'
   Components : 'AC97m:43585423'
   Controls : 2
   Simple ctrls : 2
Card1.Codecs.codec97.0.mc97.1.1:
 1-1/0: Conexant id 23

 Extended modem ID: codec=1 LIN1
 Modem status : PRA(GPIO) PRB(res) PRC(ADC1) PRD(DAC1) PRE(ADC2) PRF(DAC2) PRG(HADC) PRH(HDAC)
 Line1 rate : 8000Hz
Date: Wed Sep 15 10:05:28 2010
LiveMediaBuild: Ubuntu 10.10 "Maverick Meerkat" - Alpha i386 (20100914)
Lsusb:
 Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
 Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
 Bus 001 Device 002: ID 0930:6545 Toshiba Corp. Kingston DataTraveler 2.0 Stick (4GB) / PNY Attache 4GB Stick
 Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
MachineType: ASUSTeK Computer Inc. A6R
PccardctlIdent:
 Socket 0:
   no product info available
PccardctlStatus:
 Socket 0:
   no card
ProcCmdLine: BOOT_IMAGE=/casper/vmlinuz noprompt cdrom-detect/try-usb=true persistent file=/cdrom/preseed/hostname.seed boot=casper initrd=/casper/initrd.lz quiet splash -- maybe-ubiquity
ProcEnviron:
 LANG=it_IT.UTF-8
 SHELL=/bin/bash
RelatedPackageVersions: linux-firmware 1.38
RfKill:
 0: phy0: Wireless LAN
  Soft blocked: no
  Hard blocked: no
SourcePackage: linux
StagingDrivers: ramzswap
Title: [STAGING]
dmi.bios.date: 02/06/2006
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 210
dmi.board.asset.tag: To Be Filled By O.E.M.
dmi.board.name: A6R
dmi.board.vendor: ASUSTeK Computer Inc.
dmi.board.version: 1.0
dmi.chassis.asset.tag: ATN12345678901234567
dmi.chassis.type: 10
dmi.chassis.vendor: ASUSTeK Computer Inc.
dmi.chassis.version: 1.0
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr210:bd02/06/2006:svnASUSTeKComputerInc.:pnA6R:pvr1.0:rvnASUSTeKComputerInc.:rnA6R:rvr1.0:cvnASUSTeKComputerInc.:ct10:cvr1.0:
dmi.product.name: A6R
dmi.product.version: 1.0
dmi.sys.vendor: ASUSTeK Computer Inc.