lenovo T400 laptop heating up under load and shutsdown abruptly

hi, i am using lenovo T400 laptop dual boot with Win-XP-32bit and Ubuntu-32bit 10.10(kernel Linux 2.6.35-24-generic-pae)
The problem is when i run stress load intensive process ,
the laptop gets heated and suddenly shuts down, and the whole work gets lost.
But with XP things work absolutely fine and have no heating issues when ran the same processes.
I am struggling to get any solution for this problem.
Any workarounds or recommendation would be of great help, I don't want to give up Ubuntu which I love, because of this reason

i am consistently able to reproduce the problem when i run the stress test
stress --cpu 16 --vm 2 --vm-bytes 128M --timeout 1000s
along with that if start eclipse or jboss server it goes down abruptly

attached are the logs

ProblemType: Bug
DistroRelease: Ubuntu 10.10
Package: linux-image-2.6.35-24-generic-pae 2.6.35-24.42
Regression: Yes
Reproducible: Yes
ProcVersionSignature: Ubuntu 2.6.35-24.42-generic-pae 2.6.35.8
Uname: Linux 2.6.35-24-generic-pae i686
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.23.
Architecture: i386
ArecordDevices:
 **** List of CAPTURE Hardware Devices ****
 card 0: Intel [HDA Intel], device 0: CONEXANT Analog [CONEXANT Analog]
   Subdevices: 1/1
   Subdevice #0: subdevice #0
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: apatil 2061 F.... pulseaudio
CRDA: Error: [Errno 2] No such file or directory
Card0.Amixer.info:
 Card hw:0 'Intel'/'HDA Intel at 0xfc620000 irq 50'
   Mixer name : 'Conexant CX20561 (Hermosa)'
   Components : 'HDA:14f15051,17aa211c,00100000 HDA:14f12c06,17aa2122,00100000'
   Controls : 14
   Simple ctrls : 7
Card29.Amixer.info:
 Card hw:29 'ThinkPadEC'/'ThinkPad Console Audio Control at EC reg 0x30, fw 7VHT12WW-1.01'
   Mixer name : 'ThinkPad EC 7VHT12WW-1.01'
   Components : ''
   Controls : 1
   Simple ctrls : 1
Card29.Amixer.values:
 Simple mixer control 'Console',0
   Capabilities: pswitch pswitch-joined penum
   Playback channels: Mono
   Mono: Playback [on]
Date: Sat Dec 25 23:13:25 2010
HibernationDevice: RESUME=UUID=a6a33a77-05f0-4f1a-95df-6414a7bb5117
InstallationMedia: Ubuntu 10.10 "Maverick Meerkat" - Release i386 (20101007)
MachineType: LENOVO 2767C96
PccardctlIdent:
 Socket 0:
   no product info available
PccardctlStatus:
 Socket 0:
   no card
ProcCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.35-24-generic-pae root=UUID=a5b09417-c703-45c0-8c8c-4f0a50d86cb4 ro quiet splash i8042.reset
ProcEnviron:
 PATH=(custom, user)
 LANG=en_US.utf8
 SHELL=/bin/bash
RelatedPackageVersions: linux-firmware 1.38
SourcePackage: linux
dmi.bios.date: 01/09/2009
dmi.bios.vendor: LENOVO
dmi.bios.version: 7UET56WW (2.02 )
dmi.board.name: 2767C96
dmi.board.vendor: LENOVO
dmi.board.version: Not Available
dmi.chassis.asset.tag: No Asset Information
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: Not Available
dmi.modalias: dmi:bvnLENOVO:bvr7UET56WW(2.02):bd01/09/2009:svnLENOVO:pn2767C96:pvrThinkPadT400:rvnLENOVO:rn2767C96:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable:
dmi.product.name: 2767C96
dmi.product.version: ThinkPad T400
dmi.sys.vendor: LENOVO