Comment 116 for bug 642518

After trying many possible ways to solve my problem I finally found a way of making my ATI Radeon HD 4xxx series to work on my Dell Studio 1557 with Ubuntu 10.04.1 x64bit and also "silence" the fan that was loud and annoying:

1) I had the most resent updates available, installed
2) Downloaded the 2.6.34 mainline kernel from http://kernel.ubuntu.com/~kernel-ppa/mainline/v2.6.34-lucid/
3) Installed them, reboot.
4) Downloaded the official ATI driver from the official website
5) Run in terminal " sudo ./ati-driver-installer-10-9-x86.x86_64.run "
6) Choose "Build for detected OS Ubuntu/lucid"
7) Installed the generated packages except fglrx-dev*.deb
8) Run in the same terminal "sudo aticonfig --initial"
9) Reboot. Everything is OK, Compiz working, fan is silent... and I am happy..

My system :
lspci | grep ATI
   02:00.0 VGA compatible controller: ATI Technologies Inc M92 [Mobility Radeon HD 4500 Series]
   02:00.1 Audio device: ATI Technologies Inc RV710/730

Release :
 Ubuntu 10.04.1 (lucid)
 amd64

Kernel :
 2.6.34-020634-generic #020634 SMP