Apple machines tend to need gpio pin related quirks. If you include the output of 'pcidump -v' for the audio device it will help figure out which set of quirks your machine needs.
- very low audio volume on MacPro1,1 Allan Streib
- Re: very low audio volume on MacPro1,1 Josh Grosse
- Re: very low audio volume on MacPro1,1 Allan Streib
- Re: very low audio volume on MacPro1,1 Josh Grosse
- Re: very low audio volume on MacPro1,1 Jonathan Gray