Also, do NOT use alsamixer to test this. I have found that alsamixergui works ok.At Mon, 01 Sep 2003 13:28:30 +0200, Carsten Koch wrote:
Hi,
I have an Abit NF7 nforce2 main board, which has an optical SPDIF output controlled by the on-board sound.
With nvida's "nvsound" driver, the optical output works.
With alsa, I have been unable to get any sound out of it so far. I tried the alsa-0.9.0.cvs20030217-23 alsa drivers that came with my SuSE 8.2 system, the release 0.9.6 drivers and last Friday's CVS.
lspci reports the device as:
00:06.0 Multimedia audio controller: nVidia Corporation nForce2 AC97 Audio Controler (MCP) (rev a1) Subsystem: ABIT Computer Corp.: Unknown device 1c02 Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- Status: Cap+ 66Mhz+ UDF- FastB2B+ ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- Latency: 0 (500ns min, 1250ns max) Interrupt: pin A routed to IRQ 5 Region 0: I/O ports at d800 [size=256] Region 1: I/O ports at dc00 [size=128] Region 2: Memory at ef001000 (32-bit, non-prefetchable) [size=4K] Capabilities: [44] Power Management version 2 Flags: PMEClk- DSI- D1+ D2+ AuxCurrent=0mA PME(D0-,D1-,D2-,D3hot-,D3cold-) Status: D0 PME-Enable- DSel=0 DScale=0 PME-
Alsamixer says "Card: NVidia nForce2", "Chip: Realtek ALC650 rev 3" and offers these four IEC958 items: "Item: IEC958" (on/off), "Item: IEC958 Input Monitor" (on/off), "Item: IEC958 Playback AC97-SPSA" (3 level control), "Analog to IEC958 Output" (on/off).
I was expecting that "Item: IEC958" would turn the optical SPDIF output on/off, but the light is always on and the sound is always off, no matter how I set that switch.
how did you test spdif out? you need to choose the PCM "spdif" (aka "iec958") for the proper output over SPDIF.
I was also expecting that "Item: IEC958 Input Monitor" would route the SPDIF sound from my DVB card (whose output I have connected to the SPDIF input on the main board) to the optical SPDIF output when I set that switch to on, but again toggling that switch does nothing: the light is always on and the sound is always off.
spdif input on ALC650 didn't work until this morning. i applied the patch from James to cvs, so now it should work (as long as sf's anon-cvs repository is properly mirrored).
Takashi
alsamixer has some bugs, e.g. Muting the IEC958 output actually enables output, and un-muting disables output, but alsamixergui gets everything right.
Also, alsamixer cannot handle all the different toggle switches correctly.
Cheers James
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