Comment 7 for bug 194816

earthforce_1,

I do not see the "Unable to reserve mem region" error message in your boot messages. Do you see it if you type "dmesg"?. Do you have the snd_hda_intel module loaded (check with "lsmod |grep snd_hda_intel")?. Try to reload ("modprobe -r snd_hda_intel; modprobe snd_hda_intel") and see if you see the error message.

Booting with the option pnpacpi=off makes the device functional. Could others check if that is working for them too (I tried with apci=off, but system froze during boot)?
By looking at similar issues (https://bugzilla.redhat.com/show_bug.cgi?id=280641) this could be a bios bug, I'll try to see if I have an update available.