PCM mixer control does not affect output volume
Affects | Status | Importance | Assigned to | Milestone | |
---|---|---|---|---|---|
alsa-utils (Ubuntu) |
Confirmed
|
Low
|
Unassigned |
Bug Description
In both Lucid and Maverick, there is a PCM mixer volume control present on my HDA ATI SB, which does not affect output volume.
PA merges it, so there is a risk for volume range anomalies.
It is not listed in the codec proc file, so how and why is it created?
ProblemType: Bug
DistroRelease: Ubuntu 10.10
Package: alsa-base 1.0.23+
ProcVersionSign
Uname: Linux 2.6.35-19-generic x86_64
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.23.
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/
/dev/snd/
Card0.Amixer.info:
Card hw:0 'SB'/'HDA ATI SB at 0xfe024000 irq 16'
Mixer name : 'Realtek ALC888'
Components : 'HDA:10ec0888,
Controls : 39
Simple ctrls : 21
Card1.Amixer.info:
Card hw:1 'Juli'/'ESI Juli@ at 0xcf00, irq 21'
Mixer name : 'ICE1724 - multitrack'
Components : ''
Controls : 36
Simple ctrls : 14
Card2.Amixer.info:
Card hw:2 'HDMI'/'HDA ATI HDMI at 0xfdffc000 irq 44'
Mixer name : 'ATI R6xx HDMI'
Components : 'HDA:1002aa01,
Controls : 4
Simple ctrls : 1
Card2.Amixer.
Simple mixer control 'IEC958',0
Capabilities: pswitch pswitch-joined penum
Playback channels: Mono
Mono: Playback [off]
Date: Fri Aug 27 09:35:53 2010
EcryptfsInUse: Yes
InstallationMedia: Ubuntu 10.10 "Maverick Meerkat" - Alpha amd64 (20100826)
PackageArchitec
ProcEnviron:
LANG=sv_SE.utf8
SHELL=/bin/bash
SourcePackage: alsa-driver
dmi.bios.date: 06/24/2009
dmi.bios.vendor: Award Software International, Inc.
dmi.bios.version: F2
dmi.board.name: GA-MA770T-UD3P
dmi.board.vendor: Gigabyte Technology Co., Ltd.
dmi.board.version: x.x
dmi.chassis.type: 3
dmi.chassis.vendor: Gigabyte Technology Co., Ltd.
dmi.modalias: dmi:bvnAwardSof
dmi.product.name: GA-MA770T-UD3P
dmi.sys.vendor: Gigabyte Technology Co., Ltd.
Changed in alsa-utils (Ubuntu): | |
status: | New → Confirmed |
importance: | Undecided → Low |
Okay, so traced this down to alsactl, which adds the PCM control from userspace. It is still a mystery to me why, I'm going to ask upstream.