fan not active after sleep

I reported this bug on Debian - http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=592750
I will close that bug when I test hibernate - sleep works with the latest Debian kernel version - 2.6.32-5-amd64.
As Ubuntu is using a later version I conclude that this is a regression, although I didn't try this on Ubuntu before.

Steps to reproduce:
1. Sleep (I used the shutdown plasma widget and selected sleep from the shutdown pop-up menu)
2. Resume

Before sleeping I could hear the fan running (quietly).
After resume the fan was off (I checked by running a CPU-intensive task) and the battery status plasma-widget shows a red "x" in
a white circle. The touchpad also didn't circular-scroll as it did before sleep.

I just heard the fan kick-in at full blast - I assume it's some sort of emergency function - it's not the ramped speed increase from
idle that it usually has.

ProblemType: Bug
DistroRelease: Ubuntu 10.04
Package: linux-image-2.6.32-24-generic 2.6.32-24.42
Regression: Yes
Reproducible: Yes
ProcVersionSignature: Ubuntu 2.6.32-24.42-generic 2.6.32.15+drm33.5
Uname: Linux 2.6.32-24-generic x86_64
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.21.
Architecture: amd64
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: contact 1802 F.... pulseaudio
                      contact 1847 F.... kmix
                      contact 1962 F.... amarok
CRDA: Error: [Errno 2] No such file or directory
Card0.Amixer.info:
 Card hw:0 'Intel'/'HDA Intel at 0xd2400000 irq 22'
   Mixer name : 'Conexant CX20561 (Hermosa)'
   Components : 'HDA:14f15051,103c30d9,00100000'
   Controls : 12
   Simple ctrls : 6
Date: Sat Sep 4 02:04:19 2010
HibernationDevice: RESUME=UUID=0e5dc5f0-1209-4c23-8178-d270d1b23e0f
MachineType: Hewlett-Packard Compaq Presario A900 Notebook PC
ProcCmdLine: root=/dev/VgCompaq/ubuntu ro quiet splash vga=0x317
ProcEnviron:
 LANGUAGE=
 LANG=en_IE.UTF-8
 SHELL=/bin/bash
RelatedPackageVersions: linux-firmware 1.34.1
RfKill:
 0: phy0: Wireless LAN
  Soft blocked: no
  Hard blocked: no
SourcePackage: linux
dmi.bios.date: 09/25/2008
dmi.bios.vendor: Hewlett-Packard
dmi.bios.version: F.34
dmi.board.asset.tag: Base Board Asset Tag
dmi.board.name: 30ED
dmi.board.vendor: Hewlett-Packard
dmi.board.version: 83.21
dmi.chassis.type: 10
dmi.chassis.vendor: Hewlett-Packard
dmi.chassis.version: N/A
dmi.modalias: dmi:bvnHewlett-Packard:bvrF.34:bd09/25/2008:svnHewlett-Packard:pnCompaqPresarioA900NotebookPC:pvrF.34:rvnHewlett-Packard:rn30ED:rvr83.21:cvnHewlett-Packard:ct10:cvrN/A:
dmi.product.name: Compaq Presario A900 Notebook PC
dmi.product.version: F.34
dmi.sys.vendor: Hewlett-Packard