SiS Multimedia, no volume control, no speaker output
Carey O'Shea
carey at internode.on.net
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
out-of-the-box.
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
PME(D0-,D1-,D2-,D3hot+,D3cold+)
Status: D0 PME-Enable- DSel=0 DScale=0 PME-
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