[karmic][lucid] Intel HDA 82801G (ICH7) | STAC9200 - Mixer controlling wrong settings
Affects | Status | Importance | Assigned to | Milestone | |
---|---|---|---|---|---|
PulseAudio |
Invalid
|
Undecided
|
Unassigned | ||
linux (Ubuntu) |
Invalid
|
Undecided
|
Unassigned | ||
pulseaudio (Ubuntu) |
Invalid
|
Undecided
|
Unassigned |
Bug Description
Binary package hint: pulseaudio
Hi, this might not be a bug in pulseaudio but I wasn't sure of the right package for this.
Basically each of the volume controls in gnome seem to control the wrong mixer channel.
The exact device ID is:
00:1b.0 Audio device: Intel Corporation 82801G (ICH7 Family) High Definition Audio Controller (rev 01)
00:1b.0 0403: 8086:27d8 (rev 01)
Sliding the volume control with alsamixer open, I see behaviour where at the top 80% of the volume range, the Master level is changed from 0 to 100%. In the ~5% or so below that, the LFE level is changed from 0 to 100%. In the bottom ~15%, the PCM level is dropped.
This seems like quite deliberate behaviour, but for this laptop it is entirely inappropriate. Between the 15% and 20% setting for instance the subwoofer speaker goes from 0% to 100%, with the treble speakers off. It sounds *awful*!
More appropriate behaviour for this laptop is to have LFE at ~100% and Master at ~85%, and then just changing PCM between about 100% and 25% will give good levels for most environments. Alternatively, you can adjust both LFE and Master together - ideally with LFE slightly higher than Master - and leave PCM on high and this will achieve a similar effect.
ProblemType: Bug
Architecture: amd64
ArecordDevices:
**** List of CAPTURE Hardware Devices ****
card 0: Intel [HDA Intel], device 0: STAC92xx Analog [STAC92xx Analog]
Subdevices: 1/1
Subdevice #0: subdevice #0
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/
/dev/snd/pcmC0D0p: samv 1781 F...m pulseaudio
Card0.Amixer.info:
Card hw:0 'Intel'/'HDA Intel at 0xefffc000 irq 21'
Mixer name : 'SigmaTel STAC9200'
Components : 'HDA:83847690,
Controls : 13
Simple ctrls : 7
Date: Sat Oct 3 21:53:10 2009
DistroRelease: Ubuntu 9.10
Package: pulseaudio 1:0.9.18-0ubuntu3
ProcEnviron:
LANG=en_NZ.UTF-8
SHELL=/bin/bash
ProcVersionSign
SourcePackage: pulseaudio
Uname: Linux 2.6.31-11-generic x86_64
affects: | pulseaudio (Ubuntu) → linux (Ubuntu) |
Changed in linux (Ubuntu): | |
status: | New → Confirmed |
summary: |
- [karmic] Dell Inspiron 9400 / ICH7 - Mixer controlling wrong settings + [karmic][lucid] Dell Inspiron 9400 / ICH7 - Mixer controlling wrong + settings |
summary: |
- [karmic][lucid] Dell Inspiron 9400 / ICH7 - Mixer controlling wrong - settings + [karmic][lucid] Intel HDA 82801G (ICH7) | STAC9200 - Mixer controlling + wrong settings |
tags: | added: lucid |
Changed in linux (Ubuntu): | |
status: | Confirmed → Invalid |
Changed in pulseaudio: | |
status: | Unknown → New |
Note: workaround is to use a different mixer, such as Gnome ALSA mixer.