* ALC4082: capturing S/PDIF output causes volume to jump to max - asus rog crosshair x670e hero
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@ 2025-08-05 23:37 ` GitHub issues - edited
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From: GitHub issues - edited @ 2025-08-05 23:37 UTC (permalink / raw)
To: alsa-devel
alsa-project/alsa-ucm-conf issue #598 was edited from LuanVSO:
hi, i had a problem where opening the kde plasma volume applet would make the volume on my headphone jump to the maximum.
after muting the "PCM 2" channel on alsamixer i notice that the volume on the headphone would go muted instead.
so i edited the ALC4080-HiFi.conf file and remove every mention of S/PDIF and rebooted my machine.
after the change the problem didn't happen anymore.
what do you need to fix the mapping problem?
i think this happens because the "PCM 2" volume controls is redirecting to headphone output, but it doenst have a slider, so it is either max or muted:
<img width="1259" height="967" alt="Image" src="https://github.com/user-attachments/assets/3b266bb7-7e1c-4a7a-b448-affabf06b01c" />
(also the S/PDIF aways appeared as connected even though i did not have anything connected to it, don't know if it is expected)
[alsa-info.txt](https://github.com/user-attachments/files/21583734/alsa-info.txt)
<details>
<summary>edited ALC4080-HiFi.conf</summary>
```
Define {
SpeakerMixer "PCM"
SpeakerMindex "0"
SpeakerJack "Speaker - Output Jack"
SpeakerPCM "hw:${CardId}"
HeadphonesName "Front Headphones"
HeadphonesMixer "PCM"
HeadphonesMindex "1"
HeadphonesJack "Headphone - Output Jack"
HeadphonesPCM "hw:${CardId},1"
Mic1Name "Microphone"
Mic1Mixer "Mic"
Mic1Mindex "0"
Mic1Jack "Mic - Input Jack"
Mic1PCM "hw:${CardId},2"
Mic2Name ""
Mic2Mixer ""
Mic2Mindex "0"
Mic2Jack ""
Mic2PCM ""
Line1Name "Line Input"
Line1Mixer "Line"
Line1Mindex "0"
Line1Jack "Line - Input Jack"
Line1PCM "hw:${CardId},1"
# SpdifName "S/PDIF Output"
# SpdifPCM "hw:${CardId},3"
# SpdifMixer "PCM"
# SpdifMindex "2"
}
If.speaker_ctl {
Condition {
Type ControlExists
Control "name='Speaker Playback Switch'"
}
True.Define.SpeakerMixer "Speaker"
}
If.front_hp_ctl {
Condition {
Type ControlExists
Control "name='Front Headphone Playback Switch'"
}
True.Define {
HeadphonesMixer "Front Headphone"
HeadphonesMindex "0"
}
}
#If.spdif_ctl {
# Condition {
# Type ControlExists
# Control "name='IEC958 Playback Switch'"
# }
# True.Define {
# SpdifMixer "IEC958"
# SpdifMindex "0"
# }
#}
#If.spdif_nodev {
# Condition {
# Type RegexMatch
# String "${CardComponents}"
# Regex "USB(0db0:36e7)"
# }
# True.Define.SpdifName ""
#}
#If.spdif_dev2 {
# Condition {
# Type RegexMatch
# String "${CardComponents}"
# Regex "USB(0b05:(1996|1a5[23c])|0db0:1feb)"
# }
# True.Define.SpdifPCM "hw:${CardId},2"
#}
If.gigabyte-aorus-ultra {
Condition {
Type RegexMatch
String "${CardComponents}"
Regex "USB(0414:a014)"
}
True.Define {
Mic1Name "Front Microphone"
Mic1PCM "hw:${CardId},0"
Mic2Name "Rear Microphone"
Mic2Mixer "Mic"
Mic2Mindex "1"
Mic2Jack "name='Mic - Input Jack',index=1"
Mic2PCM "hw:${CardId},1"
SpdifName ""
Line1Name ""
}
}
If.asus-rog-usb {
Condition {
Type RegexMatch
String "${CardComponents}"
Regex "USB(0b05:1996)"
}
True.Define {
Mic1Name "Front Microphone"
Mic2Name "Microphone"
Mic2Mixer "Analog In"
Mic2Jack "Analog In - Input Jack"
Mic2PCM "hw:${CardId}"
}
}
If.asrock-taichi {
Condition {
Type RegexMatch
String "${CardComponents}"
Regex "USB(26ce:0a0[68b])"
}
True.Define {
Line1Name ""
Mic1Name "Rear Input"
Mic1PCM "hw:${CardId},0"
Mic2Name "Front Microphone"
Mic2Mixer "Mic"
Mic2Jack "Front Mic - Input Jack"
Mic2PCM "hw:${CardId},1"
}
}
If.wrx80-sage {
Condition {
Type RegexMatch
String "${CardComponents}"
Regex "USB(0b05:1984)"
}
True.Define {
Mic2Name "Front Microphone"
Mic2Mixer "Analog In"
Mic2Jack "Analog In - Input Jack"
Mic2PCM "hw:${CardId}"
}
}
If.msi-meg-unify {
Condition {
Type RegexMatch
String "${CardComponents}"
Regex "USB(0db0:82c7)"
}
True.Define {
HeadphonesName ""
SpdifName ""
}
}
If.asus-rog-strix {
Condition {
Type RegexMatch
String "${CardComponents}"
Regex "USB(0b05:1999)"
}
True.Define {
Line1PCM "hw:${CardId},3"
HeadphonesName ""
SpdifName ""
}
}
SectionVerb {
EnableSequence [
disdevall ""
]
Value.TQ "HiFi"
}
SectionDevice."Speaker" {
Comment "Speakers"
EnableSequence [
cset "name='${var:SpeakerMixer} Playback Switch',index=${var:SpeakerMindex} on"
]
DisableSequence [
cset "name='${var:SpeakerMixer} Playback Switch',index=${var:SpeakerMindex} off"
]
Value {
PlaybackChannels 2
PlaybackPriority 200
PlaybackPCM "${var:SpeakerPCM}"
JackControl "${var:SpeakerJack}"
PlaybackMixerElem "${var:SpeakerMixer},${var:SpeakerMindex}"
}
Variant."HiFi 5+1".Value.PlaybackChannels 6
Variant."HiFi 7+1".Value.PlaybackChannels 8
}
If.headphones {
Condition {
Type String
Empty "${var:HeadphonesName}"
}
False.SectionDevice."Headphones" {
Comment "${var:HeadphonesName}"
EnableSequence [
cset "name='${var:HeadphonesMixer} Playback Switch',index=${var:HeadphonesMindex} on"
]
DisableSequence [
cset "name='${var:HeadphonesMixer} Playback Switch',index=${var:HeadphonesMindex} off"
]
Value {
PlaybackPriority 300
PlaybackPCM "${var:HeadphonesPCM}"
JackControl "${var:HeadphonesJack}"
PlaybackMixerElem "${var:HeadphonesMixer},${var:HeadphonesMindex}"
}
}
}
#If.spdif {
# Condition {
# Type String
# Empty "${var:SpdifName}"
# }
# False.SectionDevice."SPDIF" {
# Comment "${var:SpdifName}"
#
# EnableSequence [
# cset "name='${var:SpdifMixer} Playback Switch',index=${var:SpdifMindex} on"
# ]
#
# DisableSequence [
# cset "name='${var:SpdifMixer} Playback Switch',index=${var:SpdifMindex} off"
# ]
#
# Value {
# PlaybackPriority 100
# PlaybackPCM "${var:SpdifPCM}"
# PlaybackMixerElem "${var:SpdifMixer},${var:SpdifMindex}"
# }
# }
#}
If.line1 {
Condition {
Type String
Empty "${var:Line1Name}"
}
False.SectionDevice."Line1" {
Comment "${var:Line1Name}"
EnableSequence [
cset "name='${var:Line1Mixer} Capture Switch',index=${var:Line1Mindex} on"
]
DisableSequence [
cset "name='${var:Line1Mixer} Capture Switch',index=${var:Line1Mindex} off"
]
Value {
CapturePriority 100
CapturePCM "${var:Line1PCM}"
JackControl "${var:Line1Jack}"
CaptureMixerElem "${var:Line1Mixer},${var:Line1Mindex}"
}
}
}
If.mic1 {
Condition {
Type String
Empty "${var:Mic1Name}"
}
False.SectionDevice."Mic1" {
Comment "${var:Mic1Name}"
EnableSequence [
cset "name='${var:Mic1Mixer} Capture Switch',index=${var:Mic1Mindex} on"
]
DisableSequence [
cset "name='${var:Mic1Mixer} Capture Switch',index=${var:Mic1Mindex} off"
]
Value {
CapturePriority 300
CapturePCM "${var:Mic1PCM}"
JackControl "${var:Mic1Jack}"
CaptureMixerElem "${var:Mic1Mixer},${var:Mic1Mindex}"
}
}
}
If.mic2 {
Condition {
Type String
Empty "${var:Mic2Name}"
}
False.SectionDevice."Mic2" {
Comment "${var:Mic2Name}"
EnableSequence [
cset "name='${var:Mic2Mixer} Capture Switch',index=${var:Mic2Mindex} on"
]
DisableSequence [
cset "name='${var:Mic2Mixer} Capture Switch',index=${var:Mic2Mindex} off"
]
Value {
CapturePriority 400
CapturePCM "${var:Mic2PCM}"
JackControl "${var:Mic2Jack}"
CaptureMixerElem "${var:Mic2Mixer},${var:Mic2Mindex}"
}
}
}
```
</details>
Issue URL : https://github.com/alsa-project/alsa-ucm-conf/issues/598
Repository URL: https://github.com/alsa-project/alsa-ucm-conf
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