I'm having some problems trying to get SL4.5 to run properly on an Intel 
Core 2 Duo system with Intel DQ965GF mobo and 2 x SATA II disks. The O/S 
installs fine but takes forever to boot up and run.

I've tried adding a number of kernel parameters including all-generic-ide, 
irqpoll, pci=nommconf, acpi-off and selinux_compat_net=1. The Intel Quick 
Start Kit available for that board reports that all necessary drivers are 
already installed. The BIOS drive configuration is set to ATA/IDE=Native 
and SATA=AHCI. I've experimented with other BIOS drive settings to no 
effect, and also built a newer kernel (2.6.21) from source.

Of course Scientific Linux 5.0 installs and runs without issue but as all 
our other machines are 4.5 I'd like to get it going on this!

Any advice appreciated,

Mark