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'"disabling IRQ 5" error when installing Red Hat/CentOS on a ASUS P4P800'

When starting the Red Hat/CentOS installer, it kept giving me an error, over and over : "disabling IRQ 5"

The installer was running very slow as well.. It seemed to me IRQ 5 was bound to the DVD drive

I had to disable the "enhanced mode" of the IDE drives under the (AMI) BIOS : Steps : - Boot the machine (no way !) - Enter the BIOS - Main menu - IDE Configuration - Onboard IDE Operate Mode - Enhanced Mode --> Compatible Mode - Save and reboot

The Red Hat/CentOS was no longer giving the error after changing this setting... Hope it helps..