[alsa-devel] /proc/asound/* shows signs of life, but alsactl see's nothing

[Takashi Iwai]

At Wed, 15 Apr 2009 16:03:07 -0700,
Justin Mattock wrote:
> 
> This is confusing to me
> (with or without the imac9,1 patch
> for the imac)
> there is still entries in /proc/asound
> 
> lrwxrwxrwx 1 root root 5 Apr 15 22:49 NVidia -> card0
> dr-xr-xr-x 7 root root 0 Apr 15 22:49 card0
> -r--r--r-- 1 root root 0 Apr 15 22:49 cards
> -r--r--r-- 1 root root 0 Apr 15 22:49 devices
> -r--r--r-- 1 root root 0 Apr 15 22:49 hwdep
> -r--r--r-- 1 root root 0 Apr 15 22:49 pcm
> -r--r--r-- 1 root root 0 Apr 15 22:49 timers
> -r--r--r-- 1 root root 0 Apr 15 22:49 version
> 
> but when I do:
> sudo /usr/sbin/alsactl store
> /usr/sbin/alsactl: save_state:1502: No soundcards found...

Check /dev/snd/* files.

> I this a software issue, or is this because the kernel is missing
> something important in patch_realtek.c ?
> 
> I've moved different things around in patch_realtek.c
> but still no speaker sound or headphone, not even
> the sound during boot when the module is being loaded.

Then it sounds like a different problem.

> Also what is the best way to find PCI SSID?

lspci -nv

> under codec#0:(I have)
> 
> Codec: Realtek ALC889A
> Address: 0
> Vendor Id: 0x10ec0885
> Subsystem Id: 0x106b4900
> Revision Id: 0x100103
> No Modem Function Group found
> 
> but with lspci -nnv
> 
> 00:08.0 0403: 10de:0ac0 (rev b1)
>         Subsystem: 10de:cb79
>         Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop-
> ParErr- Stepping- SERR- FastB2B- DisINTx-
>         Status: Cap+ 66MHz+ UDF- FastB2B+ ParErr- DEVSEL=fast >TAbort-
> <TAbort- <MAbort- >SERR- <PERR- INTx-
>         Latency: 0 (500ns min, 1250ns max)
>         Interrupt: pin A routed to IRQ 17
>         Region 0: Memory at d3480000 (32-bit, non-prefetchable) [size=16K]
>         Capabilities: <access denied>
>         Kernel driver in use: HDA Intel
>         Kernel modules: snd-hda-intel
> 
> the subsystem is 10de:cb79
> but is
> Subsystem Id: 0x106b4900

The former is PCI SSID and the latter is the codec SSID.
They are often different.


Takashi