Same problem, also on Asus A8V-VM with VT8251. Booting with pci=nomsi gets the DVD-RW drive recognized, but breaks ability to play DVDs with Kaffeine: "cannot read encrypted disc" errors appear. Libdvdcss2 is installed, and DVDs play when booting without pci=nomsi.
Same problem, also on Asus A8V-VM with VT8251. Booting with pci=nomsi gets the DVD-RW drive recognized, but breaks ability to play DVDs with Kaffeine: "cannot read encrypted disc" errors appear. Libdvdcss2 is installed, and DVDs play when booting without pci=nomsi.