built-in loudspeaker cannot be disabled

[Ralf Hildebrandt]

I have a Fujitsu Siemens Esprimo E7935-E -- with a small, built-in loadspeaker.
I found no way of turning off that loudspeaker entirely. Whenever I adjust the volume (external speakers attached via the headphone jack), it also controls the volume of the internal speaker.

$ lsb_release -rd
Description: Ubuntu karmic (development branch)
Release: 9.10

$ apt-cache policy alsa-base
alsa-base:
  Installed: 1.0.20+dfsg-1ubuntu4
  Candidate: 1.0.20+dfsg-1ubuntu4
  Version table:
 *** 1.0.20+dfsg-1ubuntu4 0
        500 http://us.archive.ubuntu.com karmic/main Packages
        100 /var/lib/dpkg/status

[Ralf Hildebrandt (ralf-hildebrandt)]

Architecture: i386
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: hildeb 13072 F.... pulseaudio
 /dev/snd/pcmC0D0p: hildeb 13618 f...m last.fm
 /dev/snd/controlC1: hildeb 13072 F.... pulseaudio
CRDA: Error: [Errno 2] No such file or directory
Card0.Amixer.info:
 Card hw:0 'Intel'/'HDA Intel at 0xfc220000 irq 20'
   Mixer name : 'Realtek ALC663'
   Components : 'HDA:10ec0663,17341157,00100001'
   Controls : 23
   Simple ctrls : 14
Card1.Amixer.info:
 Card hw:1 'U0x46d0x8c5'/'USB Device 0x46d:0x8c5 at usb-0000:00:1a.7-1, high speed'
   Mixer name : 'USB Mixer'
   Components : 'USB046d:08c5'
   Controls : 2
   Simple ctrls : 1
Card1.Amixer.values:
 Simple mixer control 'Mic',0
   Capabilities: cvolume cvolume-joined cswitch cswitch-joined
   Capture channels: Mono
   Limits: Capture 0 - 3072
   Mono: Capture 2442 [79%] [18.00dB] [off]
CurrentDmesg:
 [ 40.188027] eth0: no IPv6 routers present
 [57148.705077] udev: starting version 146
 [57220.756695] __ratelimit: 3 callbacks suppressed
 [57220.756698] type=1505 audit(1251271576.153:13): operation="profile_replace" pid=10133 name=/usr/lib/cups/backend/cups-pdf
 [57220.757320] type=1505 audit(1251271576.157:14): operation="profile_replace" pid=10133 name=/usr/sbin/cupsd
DistroRelease: Ubuntu 9.10
HibernationDevice: RESUME=UUID=fbc0d048-800c-4d4d-8f2c-401821359b44
IwConfig:
 lo no wireless extensions.

 eth0 no wireless extensions.
MachineType: FUJITSU SIEMENS ESPRIMO E7935
NonfreeKernelModules: nvidia
Package: linux (not installed)
PccardctlIdent:

PccardctlStatus:

ProcCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.31-7-generic-pae root=UUID=80fa6bc9-9835-4b04-be4b-deb8bee191ed ro noquiet nosplash
ProcEnviron:
 SHELL=/bin/bash
 LANG=en_US.UTF-8
ProcVersionSignature: Ubuntu 2.6.31-7.27-generic-pae
RelatedPackageVersions:
 linux-backports-modules-2.6.31-7-generic-pae 2.6.31-7.8
 linux-firmware 1.16
RfKill:

Uname: Linux 2.6.31-7-generic-pae i686
UserGroups: adm cdrom dialout lpadmin plugdev sambashare
WpaSupplicantLog:

dmi.bios.date: 06/03/2009
dmi.bios.vendor: FUJITSU SIEMENS // Phoenix Technologies Ltd.
dmi.bios.version: 6.00 R1.15.2828.A1
dmi.board.name: D2828-A1
dmi.board.vendor: FUJITSU SIEMENS
dmi.board.version: S26361-D2828-A1
dmi.chassis.type: 3
dmi.chassis.vendor: FUJITSU SIEMENS
dmi.modalias: dmi:bvnFUJITSUSIEMENS//PhoenixTechnologiesLtd.:bvr6.00R1.15.2828.A1:bd06/03/2009:svnFUJITSUSIEMENS:pnESPRIMOE7935:pvr:rvnFUJITSUSIEMENS:rnD2828-A1:rvrS26361-D2828-A1:cvnFUJITSUSIEMENS:ct3:cvr:
dmi.product.name: ESPRIMO E7935
dmi.sys.vendor: FUJITSU SIEMENS