Comment 26 for bug 474359

Hi,

@danrgmc,

I've the same MoBo as you : P7P55D-E from Asus. Using Ubuntu 10.4 (Lucid, AMD64 version) I did have the same issue : sound input (microphone) did not work at all.

Installing the backport as stated in the first answer, i.e. "linux-backports-modules-alsa-lucid-generic", then reboot, then I had to configure the sound service properly (using the GUI, when you clic on the speaker, usually on the top right of the desktop -> Settings, because the input was disabled by the software, i.e. PulseAudio had the mic disabled by default).

All this steps solved the issue for me.

Technical details :
$ uname -a
Linux athena 2.6.32-24-generic #38-Ubuntu SMP Mon Jul 5 09:20:59 UTC 2010 x86_64 GNU/Linux

$ LC_ALL=C aptitude show linux-backports-modules-alsa-lucid-generic
Package: linux-backports-modules-alsa-lucid-generic
New: yes
State: installed
Automatically installed: no
Version: 2.6.32.24.25
Priority: optional
Section: devel
Maintainer: Ubuntu Kernel Team <email address hidden>
Uncompressed Size: 32.8k
Depends: linux-backports-modules-alsa-2.6.32-24-generic
Description: Backported drivers for alsa-driver snapshot.
 This empty package allows people to keep their alsa-driver snapshot up-to-date
 when upgrading their Linux kernel.

$ lspci|grep Audio
00:1b.0 Audio device: Intel Corporation 5 Series/3400 Series Chipset High Definition Audio (rev 06)
01:00.1 Audio device: nVidia Corporation High Definition Audio Controller (rev a1)

$ lsmod|grep snd
snd_hda_codec_nvhdmi 14282 4
snd_hda_codec_via 60865 1
snd_hda_intel 23832 2
snd_hda_codec 99579 3 snd_hda_codec_nvhdmi,snd_hda_codec_via,snd_hda_intel
snd_hwdep 7034 1 snd_hda_codec
snd_pcm_oss 40633 0
snd_mixer_oss 16538 1 snd_pcm_oss
snd_pcm 88269 3 snd_hda_intel,snd_hda_codec,snd_pcm_oss
snd_seq_dummy 1910 0
snd_seq_oss 31906 0
snd_seq_midi 5797 0
snd_rawmidi 23289 1 snd_seq_midi
snd_seq_midi_event 7267 2 snd_seq_oss,snd_seq_midi
snd_seq 58036 6 snd_seq_dummy,snd_seq_oss,snd_seq_midi,snd_seq_midi_event
snd_timer 23085 2 snd_pcm,snd_seq
snd_seq_device 7176 5 snd_seq_dummy,snd_seq_oss,snd_seq_midi,snd_rawmidi,snd_seq
snd 72583 19 snd_hda_codec_nvhdmi,snd_hda_codec_via,snd_hda_intel,snd_hda_codec,snd_hwdep,snd_pcm_oss,snd_mixer_oss,snd_pcm,snd_seq_dummy,snd_seq_oss,snd_seq_midi,snd_rawmidi,snd_seq,snd_timer,snd_seq_device
soundcore 8052 1 snd
snd_page_alloc 8692 2 snd_hda_intel,snd_pcm

$ cat /proc/asound/card0/codec#* | grep Codec
Codec: VIA VT1828S

Best regards,
Yannick