[64studio-devel] [64 Studio] #287: Possible kernel regression

[Daniel James]

Hi Dick,

> I wonder if it is related to the on-board sound chip, an AC97. Although 
> it is disabled in the BIOS, numerous references to it appear in the 
> installed kernel module names. The only reason I have for this suspicion 
> is that the AC97 operates at 48k only and when my machine has been 
> rebooted it will only work at 48k and below.

I think you may have fallen victim to ALSA's inconsistency over device 
naming between reboots. Please try the following...

As root, add lines like these to the end of your 
/etc/modprobe.d/alsa-base file:

alias snd-card-0 snd-ice1712

options snd-ice1712 index=0

alias snd-card-1 snd-intel8x0

options snd-intel8x0 index=1

(I'm guessing the driver for your AC97 card is snd-intel8x0, please 
check in lsmod for the exact module name). Then your M-Audio card 
(snd-ice1712) should always be hw:0 after a reboot.

If that still makes no difference to the 96kHz problem, please add the 
AC97 module name to /etc/hotplug/blacklist.d/alsa-base (without the 
comment '#') and reboot.

Cheers!

Daniel