To Dynamiclc,
system> preferences>sound>Hardware. Can you kindly see and post what's mentioned under the "Hardware" option? Thank you.

vyver.

vyver:

There's only one device to choose to configure under "system -> preferences -> sound -> hardware " :
Interal Audio
1 Output / 1 Input
Analog Stereo Duplex
in the option "Profile" in "Settings for the selected device:"
there are six choices to choose from with default as "Analog Stereo Duplex":
Off
Analog Stereo Input
Analog Stereo Output
Analog Stereo Duplex
Analog Stereo Duplex (IEC958)
Analog Stereo (IEC958) Output + Analog Stereo Input

Thank you!

I've deleted the Windows XP files but the partition architecture is still there, I didn't do the formatting, because when I finish dual system boot, whenever I tried to boot Win XP, it crashed as a blue screen. So, I frown and delete it over a whim.

Now I only want to make Skype phone call to my family memebers in China, I'm South Korea for study. I'm an Ubuntu and Linux newie. Thank you for your help! The system didn't recognize the mic. That's the problem.

Some suggestions online doesn't work for my system. Like add a line "options snd-hda-intel model=ref" to the end of file "/etc/modprobe.d/alsa-base.conf"

Hello dynamiclc,

please post the output of the commands:and please a screenshot of your alsamixer (on the commandline).
I'd recommend to post this issue in a new thread because it can't be seen from the thread-title what your problem is.

Markus

I don't know how to screenshot. Here is the info you need:

========================================================================
congliu@congliu-laptop:~$ lspci | grep -i audio
00:1b.0 Audio device: Intel Corporation N10/ICH 7 Family High Definition Audio Controller (rev 02)
congliu@congliu-laptop:~$ lsmod | grep snd
snd_hda_codec_conexant 22641 1
snd_hda_intel 22037 2
snd_hda_codec 74201 2 snd_hda_codec_conexant,snd_hda_intel
snd_hwdep 5412 1 snd_hda_codec
snd_pcm_oss 35308 0
snd_mixer_oss 13746 1 snd_pcm_oss
snd_pcm 70694 3 snd_hda_intel,snd_hda_codec,snd_pcm_oss
snd_seq_dummy 1338 0
snd_seq_oss 26722 0
snd_seq_midi 4557 0
snd_rawmidi 19056 1 snd_seq_midi
snd_seq_midi_event 6003 2 snd_seq_oss,snd_seq_midi
snd_seq 47263 6 snd_seq_dummy,snd_seq_oss,snd_seq_midi,snd_seq_midi_event
snd_timer 19098 2 snd_pcm,snd_seq
snd_seq_device 5700 5 snd_seq_dummy,snd_seq_oss,snd_seq_midi,snd_rawmidi,snd_seq
snd 54180 16 snd_hda_codec_conexant,snd_hda_intel,snd_hda_codec,snd_hwdep,snd_pcm_oss,snd_mixer_oss,snd_pcm,snd_s eq_oss,snd_rawmidi,snd_seq,snd_timer,snd_seq_device
soundcore 6620 1 snd
snd_page_alloc 7076 2 snd_hda_intel,snd_pcm

========================================================================

I've posted another thread, called "How to let Ubuntu recognize microphone?" in Hardware part of this forum.

But wait, ah, I've done it! there I can use my microphone now: after I installed the GNOME ALSA Mixer. Unmute the external mic. Everything seems so simple and intuitive and I just don't know I haven't installed the GNOME ALSA Mixer before. How silly of me.

Still what does the commands mean:
Thank you, markus, very much!

I'm happy to read that its working now for you. The commands mean:
lspci gives a list of your hardware, this is piped with "|" to grep which selects all lines with the word audio and since we don't know, if there is "audio" or "Audio" the -i options tells grep to search caseindependent.
lsmod lists the modules which are loaded and we grep for snd.

Markus

To Dynamiclc,
I too am happy for your sake! You "may"give Markush's post the credit and close the thread as solved!Congrats!See you around.
regards,
vyver.