Fan keeps running too much

I recently installed Ubuntu 11.10 on my new Dell laptop and now I find that the fan is running a lot more now than in windows and I find the laptop is geeting a lot hotter now as well?

What should I do? I am a newbie in Linux!

using Dell -Inspiron

some info on my system - hope it might help you with my question.

Controller (rev 09)
Subsystem: Dell Device 04b0
Kernel driver in use: agpgart-intel
00:02.0 VGA compatible controller: Intel Corporation 2nd Generation Core Processor Family Integrated Graphics Controller (rev 09)
Subsystem: Dell Device 04b0
Kernel driver in use: i915
Kernel modules: i915
00:16.0 Communication controller: Intel Corporation 6 Series/C200 Series Chipset Family MEI Controller #1 (rev 04)
Subsystem: Dell Device 04b0
Kernel driver in use: mei
Kernel modules: mei
00:1a.0 USB Controller: Intel Corporation 6 Series/C200 Series Chipset Family USB Enhanced Host Controller #2 (rev 05)
Subsystem: Dell Device 04b0
Kernel driver in use: ehci_hcd
00:1b.0 Audio device: Intel Corporation 6 Series/C200 Series Chipset Family High Definition Audio Controller (rev 05)
Subsystem: Dell Device 04b0
Kernel driver in use: HDA Intel
Kernel modules: snd-hda-intel
00:1c.0 PCI bridge: Intel Corporation 6 Series/C200 Series Chipset Family PCI Express Root Port 1 (rev b5)
Kernel driver in use: pcieport
Kernel modules: shpchp
00:1c.1 PCI bridge: Intel Corporation 6 Series/C200 Series Chipset Family PCI Express Root Port 2 (rev b5)
Kernel driver in use: pcieport
Kernel modules: shpchp
00:1c.3 PCI bridge: Intel Corporation 6 Series/C200 Series Chipset Family PCI Express Root Port 4 (rev b5)
Kernel driver in use: pcieport
Kernel modules: shpchp
00:1c.4 PCI bridge: Intel Corporation 6 Series/C200 Series Chipset Family PCI Express Root Port 5 (rev b5)
Kernel driver in use: pcieport
Kernel modules: shpchp
00:1c.7 PCI bridge: Intel Corporation 6 Series/C200 Series Chipset Family PCI Express Root Port 8 (rev b5)
Kernel driver in use: pcieport
Kernel modules: shpchp
00:1d.0 USB Controller: Intel Corporation 6 Series/C200 Series Chipset Family USB Enhanced Host Controller #1 (rev 05)
Subsystem: Dell Device 04b0
Kernel driver in use: ehci_hcd
00:1f.0 ISA bridge: Intel Corporation HM67 Express Chipset Family LPC Controller (rev 05)
Subsystem: Dell Device 04b0
Kernel modules: iTCO_wdt
00:1f.2 SATA controller: Intel Corporation 6 Series/C200 Series Chipset Family 6 port SATA AHCI Controller (rev 05)
Subsystem: Dell Device 04b0
Kernel driver in use: ahci
Kernel modules: ahci
00:1f.3 SMBus: Intel Corporation 6 Series/C200 Series Chipset Family SMBus Controller (rev 05)
Subsystem: Dell Device 04b0
Kernel modules: i2c-i801
05:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8101E/RTL8102E PCI Express Fast Ethernet controller (rev 05)
Subsystem: Dell Device 04b0
Kernel driver in use: r8169
Kernel modules: r8169
09:00.0 Network controller: Intel Corporation Centrino Wireless-N 1030 (rev 34)

Tanks in advance

Clive