[Pkg-alsa-devel] Bug#588498: alsa-base: Thinkpad T61 internal mic does not work

Zack Weinberg zackw at panix.com
Fri Jul 9 04:53:06 UTC 2010

Package: alsa-base
Version: 1.0.23+dfsg-1
Severity: normal

My Thinkpad T61's internal microphone will not capture sound, no
matter what I do to the various sliders and switches in alsamixer.
In particular, in the "Capture" screen I have 'capture' and 'capture 1'
both maxed out and with CAPTURE in red below them, both 'input source'
selectors set to 'internal mic', and 'internal mic boost' maxed out, and
the GNOME audio recorder application still records silence.

If I unmute the "Internal mic" slider in the "Playback" screen and raise it
a bit, there is a humming noise, which turns into a nasty feedback squeal at
about 50/100; however, the GNOME audio recorder still sees silence.

The presence or absence of the OSS compatibility modules in the running
kernel does not seem to make any difference.

-- Package-specific info:
--- Begin additional package status ---
| Status=Not/Inst/Conf-files/Unpacked/halF-conf/Half-inst/trig-aWait/Trig-pend
|/ Err?=(none)/Reinst-required (Status,Err: uppercase=bad)
||/ Name           Version        Description
ii  libasound2     1.0.23-1       shared library for ALSA applications
--- End additional package status ---
--- Begin /proc/asound/version ---
Advanced Linux Sound Architecture Driver Version 1.0.21.
--- End /proc/asound/version ---
--- Begin /proc/asound/cards ---
 0 [Intel          ]: HDA-Intel - HDA Intel
                      HDA Intel at 0xfe020000 irq 17
--- End /proc/asound/cards ---
--- Begin /dev/snd/ listing ---
total 0
drwxr-xr-x  2 root root      60 Jul  8 19:50 by-path
crw-rw----+ 1 root audio 116, 8 Jul  8 19:50 controlC0
crw-rw----+ 1 root audio 116, 7 Jul  8 19:50 hwC0D0
crw-rw----+ 1 root audio 116, 6 Jul  8 19:53 pcmC0D0c
crw-rw----+ 1 root audio 116, 5 Jul  8 21:20 pcmC0D0p
crw-rw----+ 1 root audio 116, 4 Jul  8 19:50 pcmC0D1p
crw-rw----+ 1 root audio 116, 3 Jul  8 19:50 seq
crw-rw----+ 1 root audio 116, 2 Jul  8 19:50 timer
--- End /dev/snd/ listing ---

-- System Information:
Debian Release: squeeze/sid
  APT prefers unstable
  APT policy: (500, 'unstable'), (101, 'experimental')
Architecture: amd64 (x86_64)

Kernel: Linux 2.6.32-5-amd64 (SMP w/2 CPU cores)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/bash

Versions of packages alsa-base depends on:
ii  linux-sound-base           1.0.23+dfsg-1 base package for ALSA and OSS soun
ii  lsof                       4.81.dfsg.1-1 List open files
ii  module-init-tools          3.12-1        tools for managing Linux kernel mo
ii  udev                       158-1         /dev/ and hotplug management daemo

Versions of packages alsa-base recommends:
ii  alsa-utils                    1.0.23-2   Utilities for configuring and usin

Versions of packages alsa-base suggests:
pn  alsa-oss                      <none>     (no description available)
pn  apmd                          <none>     (no description available)
pn  oss-compat                    <none>     (no description available)

Versions of packages libasound2 depends on:
ii  libc6                         2.11.2-2   Embedded GNU C Library: Shared lib

-- Configuration Files:
/etc/modprobe.d/alsa-base.conf changed:
install sound-slot-0 /sbin/modprobe snd-card-0
install sound-slot-1 /sbin/modprobe snd-card-1
install sound-slot-2 /sbin/modprobe snd-card-2
install sound-slot-3 /sbin/modprobe snd-card-3
install sound-slot-4 /sbin/modprobe snd-card-4
install sound-slot-5 /sbin/modprobe snd-card-5
install sound-slot-6 /sbin/modprobe snd-card-6
install sound-slot-7 /sbin/modprobe snd-card-7
install snd /sbin/modprobe --ignore-install snd && { /sbin/modprobe --quiet snd-ioctl32 ; /sbin/modprobe --quiet snd-seq ; }
install snd-rawmidi /sbin/modprobe --ignore-install snd-rawmidi && { /sbin/modprobe --quiet snd-seq-midi ; : ; }
install snd-emu10k1 /sbin/modprobe --ignore-install snd-emu10k1 && { /sbin/modprobe --quiet snd-emu10k1-synth ; : ; }
options bt87x index=-2
options cx88_alsa index=-2
options snd-atiixp-modem index=-2
options snd-intel8x0m index=-2
options snd-via82xx-modem index=-2
options snd-pcsp index=-2
options snd-usb-audio index=-2
options snd-hda-intel model=thinkpad

-- no debconf information

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