ALC883 ( HDA VIA VT82XX ), sound card didn't work in Fedora 15 !
I have test and resolved this issue doing the next:
I just add pci=use_crs to my Kernel options and now I have sound.
sudo gedit /etc/default/grub and add change the line GRUB_CMDLINE_LINUX_DEFAULT="quiet splash" to
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash pci=use_crs"