SiS Multimedia, no volume control, no speaker output

Carey O'Shea carey at
Fri Sep 9 02:10:18 CDT 2005

I am unable to control my volume with the "Master" volume with my AC97 
soundcard. It's because it is reversed with the headphone level. This 
makes the drop-down volume changer in Gnome (a critical part of a 
desktop) not work at all.

To fix this, I added ac97_quirk=1 in my aliases for my sound module 
(snd_intel8x0). It fixed it and the Master volume now works as expected. 
Shouldn't this be done automatically?

Also another problem -- no laptop speaker output, 100% silent. Headphone 
works fine. To fix this I had to untick "external amplifier", then the 
speakers will work. Shouldn't this also be auto configured or is there 
reasons not to do it? (Yes I am unplugging the headphone when doing 
these tests:)

I have noted some other distros (eg SuSE IIRC) do these things 

Here is the output of `lspci -vv` of my sound card:

0000:00:02.7 Multimedia audio controller: Silicon Integrated Systems 
[SiS] Sound Controller (rev a0)
        Subsystem: Rioworks: Unknown device 2038
        Control: I/O+ Mem- BusMaster+ SpecCycle- MemWINV- VGASnoop- 
ParErr- Stepping- SERR+ FastB2B-
        Status: Cap+ 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- 
<TAbort- <MAbort- >SERR- <PERR-
        Latency: 64 (13000ns min, 2750ns max)
        Interrupt: pin C routed to IRQ 18
        Region 0: I/O ports at e400 [size=256]
        Region 1: I/O ports at e000 [size=128]
        Capabilities: [48] Power Management version 2
                Flags: PMEClk- DSI- D1+ D2+ AuxCurrent=55mA 
                Status: D0 PME-Enable- DSel=0 DScale=0 PME-

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