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

[Dick Wright]

Hello Daniel

I tried both of your suggestions, more in hope than expectation. No 
change I'm afraid.

I guess you will have forgotten my early mails on the subject; the 
maudio 24/96 will work simplex at 96k and the sound comes out of the 
correct sockets.

I have done one more thing. I got the card working by reinstalling the 
alsa modules. Then I killed the power to the m/c, giving it no chance to 
write to alsa mixer settings or anything else. When I started it up 
again (and it did start, thankfully), jack would not connect at 96k 
duplex. So whatever goes wrong probably happens in the boot. Could it be 
that some resource, allocated at boot, is insufficient. Or should I buy 
some different hardware.
All suggestions welcome.

Regards

Dick

In message <46850469.6030200 at 64studio.com>, Daniel James 
<daniel at 64studio.com> writes
>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