Apologies for hijacking this thread, but I have posted here before and received not a single response. This is on CentOS5. http://lists.centos.org/pipermail/centos/2011-November/119707.html Other than the OP, I don't want HDMI sound, but the builtin sound device is not working. In a nutshell, a machine with this sound configuration # lspci |grep -i aud 00:1b.0 Audio device: Intel Corporation 82801JI (ICH10 Family) HD Audio Controller 02:00.1 Audio device: nVidia Corporation GF108 High Definition Audio Controller (rev a1) # does not play any sound, whereas this otherwise identical one works 00:1b.0 Audio device: Intel Corporation 82801JI (ICH10 Family) HD Audio Controller In the non-working case, /etc/modprobe.conf has alias snd-card-1 snd-hda-intel options snd-card-1 index=1 options snd-hda-intel index=1 remove snd-hda-intel { /usr/sbin/alsactl store 1 >/dev/null 2>&1 || : ; }; /sbin /modprobe -r --ignore-remove snd-hda-intel and on the working machine, options snd-hda-intel index=0 remove snd-hda-intel { /usr/sbin/alsactl store 0 >/dev/null 2>&1 || : ; }; /sbin/modprobe -r --ignore-remove snd-hda-intel The non-working config has /dev/audio1, which plays horribly distorted sound (cat file >/dev/audio1). The working config has /dev/audio, which works fine. The BIOS only has an option to enable sound, when I disable it, the snd* modules don't get loaded and volume prefs etc. don't work (kinda logical). I presume the problem is that there is no driver for the nvidia sound device, yet it is configured as card 0 (default). Again, in the non-working case I have # cat /proc/asound/cards 1 [Intel ]: HDA-Intel - HDA Intel HDA Intel at 0xf7ffc000 irq 169 # and in the working case, I have # cat /proc/asound/cards 0 [Intel ]: HDA-Intel - HDA Intel HDA Intel at 0xf7ffc000 irq 82 # Any ideas how I can get sound working on this machine? (It works very well under CentOS6, btw., PA let's me choose either device and the speaker tests are successful.)