After updating the Kernel to version 3.6.8 through website upubuntu( http://www.upubuntu.com/2012/11/install-linux-kernel-368-in-ubuntu.html ), it SOLVED!
Finally, sound on my iMac9,1 ALC889A come back again. No need to use "model=imac91", etc., it's just work.
Everaldo, thank a lot !! Cheer.
After updating the Kernel to version 3.6.8 through website upubuntu( http:// www.upubuntu. com/2012/ 11/install- linux-kernel- 368-in- ubuntu. html ), it SOLVED!
Finally, sound on my iMac9,1 ALC889A come back again. No need to use "model=imac91", etc., it's just work.
Everaldo, thank a lot !!
Cheer.