if your computer does not use the mono pin for any output
http://www.alsa-project.org/~tiwai/alsa-driver-api/re86.html
define a new quirk AC97_REMOVE_MASTER_MONO to remove master mono playback
volume and switch for
snd_ac97_tune_hardware in ac97_codec.c
snd_ac97_remove_ctl(ac97, "Master Mono Playback", "Switch");
snd_ac97_remove_ctl(ac97, "Master Mono Playback", "Volume");
Advanced information - PCI Vendor/Device/Subsystem ID's
!!--------------------------------------------------------
00:1f.5 0401: 8086:24c5 (rev 01)
Subsystem: 1734:0088
add your PCI subvendor , subdevice, name and the new quirk type to ac97_quirks
in intel8x0.c
static struct ac97_quirk ac97_quirks[] = {
{
.subvendor = 0x1734,
.subdevice = 0x0088,
.name = "Fujitsy SCENIC P300",
.type = AC97_REMOVE_MASTER_MONO
},
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https://bugs.launchpad.net/bugs/1203052
Title:
[ICH4 - Intel 82801DB-ICH4, playback] No sound at all after upgrade to
Raring (13.04)
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