[Bug 41015] [ALSA] Master volume control doesn't control Headphone control

[Adolfo González Blázquez]

Public bug reported:

Affects: linux-source-2.6.15 (Ubuntu)
       Severity: Normal
       Priority: (none set)
         Status: Unconfirmed


Description:
Hello,

I have an integrated Intel ICH6 with AD1981B sound card on my laptop (HP
Compaq nx8220). I usually use some speakers connected to the Headphone
line out.

In Breezy, when using the Master Volume Control you could control
everysound in the computer (internal speakers and headphones). In
Dapper, this doesn't work anymore. So i need to low Headphone Volume
control to quiet the external speakers.

I think the default behaviour should be the breezy one, so the master
volume control everysound in the computer.

I am using Dapper up-to-date, with kernel 2.6.15-21-686

Hope this can be fixed before Dapper is released.

$ cat /proc/asound/cards
0 [ICH6           ]: ICH4 - Intel ICH6
                     Intel ICH6 with AD1981B at 0xc8c01000, irq 50

$ cat /proc/asound/card0/codec97#0/ac97#0-0
0-0/0: Analog Devices AD1981B

Capabilities     : -headphone out-
DAC resolution   : 20-bit
ADC resolution   : 16-bit
3D enhancement   : No 3D Stereo Enhancement

Current setup
Mic gain         : +0dB [+0dB]
POP path         : pre 3D
Sim. stereo      : off
3D enhancement   : off
Loudness         : off
Mono output      : MIX
Mic select       : Mic1
ADC/DAC loopback : off
Extended ID      : codec=0 rev=1 AMAP DSA=0 VRA
Extended status  : VRA
PCM front DAC    : 48000Hz
PCM ADC          : 48000Hz


AD18XX configuration
Unchained        : 0x1000,0x0000,0x0000
Chained          : 0x0000,0x0000,0x0000

$ sudo lspci -vvv
0000:00:1e.2 Multimedia audio controller: Intel Corporation 82801FB/FBM/FR/FW/FRW (ICH6 Family) AC'97 Audio Controller (rev 03)
        Subsystem: Hewlett-Packard Company: Unknown device 0934
        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: 0
        Interrupt: pin A routed to IRQ 50
        Region 0: I/O ports at 3100 [size=256]
        Region 1: I/O ports at 3200 [size=64]
        Region 2: Memory at c8c01000 (32-bit, non-prefetchable) [size=512]
        Region 3: Memory at c8c02000 (32-bit, non-prefetchable) [size=256]
        Capabilities: [50] Power Management version 2
                Flags: PMEClk- DSI- D1- D2- AuxCurrent=375mA PME(D0+,D1-,D2-,D3hot+,D3cold+)
                Status: D0 PME-Enable- DSel=0 DScale=0 PME-

-- 
[ALSA] Master volume control doesn't control Headphone control
https://launchpad.net/bugs/41015