display broken with intel i7 hd graphic(rev2) on hp 2540p

Booting with a 2.6.37 kernel, we only get a white screen.
This used to work fine in maverick with default kernel
current natty is affected (tested on an usb stick)
upstream 2.6.37 released is affected (tested)
2.6.36.2 works (althoug theree are modelines errors with external projector )

ProblemType: Bug
DistroRelease: Ubuntu 10.10
Package: linux-image-2.6.35-24-generic 2.6.35-24.42
Regression: Yes
Reproducible: Yes
ProcVersionSignature: Ubuntu 2.6.35-24.42-generic 2.6.35.8
Uname: Linux 2.6.35-24-generic x86_64
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.23.
Architecture: amd64
ArecordDevices:
 **** List of CAPTURE Hardware Devices ****
 card 0: Intel [HDA Intel], device 0: STAC92xx Analog [STAC92xx Analog]
   Subdevices: 2/2
   Subdevice #0: subdevice #0
   Subdevice #1: subdevice #1
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: olivier 1914 F.... pulseaudio
CRDA: Error: [Errno 2] No such file or directory
Card0.Amixer.info:
 Card hw:0 'Intel'/'HDA Intel at 0xd4720000 irq 47'
   Mixer name : 'Intel IbexPeak HDMI'
   Components : 'HDA:111d7603,103c7008,00100202 HDA:80862804,80860101,00100000'
   Controls : 27
   Simple ctrls : 15
Date: Fri Jan 7 09:45:15 2011
EcryptfsInUse: Yes
HibernationDevice: RESUME=UUID=a912b660-cc48-489d-9a8b-229c4fea7aff
MachineType: Hewlett-Packard HP EliteBook 2540p
PccardctlIdent:
 Socket 0:
   product info: "RICOH", "Bay8Controller", "", ""
   manfid: 0x0000, 0x0000
   function: 254 (unknown)
PccardctlStatus:
 Socket 0:
   3.3V 16-bit PC Card
   Subdevice 0 (function 0) bound to driver "pata_pcmcia"
ProcCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.35-24-generic root=UUID=e1d1c430-c65b-4c46-a682-b5a2eb2c65a6 ro splash quiet
ProcEnviron:
 PATH=(custom, user)
 LANG=en_US.utf8
 SHELL=/bin/bash
RelatedPackageVersions: linux-firmware 1.38.2
SourcePackage: linux
dmi.bios.date: 05/25/2010
dmi.bios.vendor: Hewlett-Packard
dmi.bios.version: 68CSU Ver. F.03
dmi.board.name: 7008
dmi.board.vendor: Hewlett-Packard
dmi.board.version: KBC Version 38.2E
dmi.chassis.asset.tag: CZC0410LD8
dmi.chassis.type: 10
dmi.chassis.vendor: Hewlett-Packard
dmi.modalias: dmi:bvnHewlett-Packard:bvr68CSUVer.F.03:bd05/25/2010:svnHewlett-Packard:pnHPEliteBook2540p:pvr:rvnHewlett-Packard:rn7008:rvrKBCVersion38.2E:cvnHewlett-Packard:ct10:cvr:
dmi.product.name: HP EliteBook 2540p
dmi.sys.vendor: Hewlett-Packard