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I have a SATA (not PATA!) DVD+RW connected to an Intel ICH8R controller set to AHCI mode in the BIOS. When the controller is in AHCI mode, I cannot boot the DVD. I get a blank black screen for a while, and then I boot from the hard drive instead. When I switch the controller to IDE mode, ISOLINUX starts just fine, and I can do the installation. GRUB and the Fedora kernel recognize the controller in AHCI mode just fine. It just seems to be booting from the DVD that's a problem. lcpci says the controller is: 00:1f.2 SATA controller: Intel Corporation 82801HR/HO/HH (ICH8R/DO/DH) 6 port SATA AHCI Controller (rev 02) The DVD+RW drive is a Plextor PX-755SA.
Are there any BIOS updates available for your motherboard? It sounds a lot like a BIOS bug to me...
There were several BIOS versions after mine (I have an ASUS P5B Deluxe), and I installed the latest update. My machine still cannot boot the FC7 x86_64 DVD when the SATA controller is in AHCI mode. I have the same symptoms as the initial comment.
Wait, why is this NOTABUG? I marked it as ASSIGNED, I could swear.
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This is working just fine in Fedora 9.
Thank you for reporting back. Closing bug as per comment #5.