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Thread: Realtek ALC272. Empathy kills microphone

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  1. #1
    Join Date
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    Exclamation Realtek ALC272. Empathy kills microphone

    Hi,

    I'm running Ubuntu 10.04 (i686) on Acer Aspire 5551G. This laptop has Realtek ALC272 sound chip. Both sound and microphone work fine. But, when I start video/audio call in Empathy the microphone dies until I reboot the laptop (sound continues to work). The same happens with Pidgin and Ekiga. So, I can't make video/audio calls.

    Any ideas?

    I believe this is pulse/alsa bug.

    Thanks in advance

  2. #2
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    Re: Realtek ALC272. Empathy kills microphone

    Quote Originally Posted by uaaquarius View Post
    Hi,

    I'm running Ubuntu 10.04 (i686) on Acer Aspire 5551G. This laptop has Realtek ALC272 sound chip. Both sound and microphone work fine. But, when I start video/audio call in Empathy the microphone dies until I reboot the laptop (sound continues to work). The same happens with Pidgin and Ekiga. So, I can't make video/audio calls.

    Any ideas?

    I believe this is pulse/alsa bug.

    Thanks in advance
    It sounds like a PulseAudio bug, which might be caused by issues with Alsa.
    The workaround would be to restart PulseAudio to get the mic working.
    Of course, this should not happen it is would be good to figure out who is at fault, so that we inform either Alsa or PulseAudio.

    There is a tool to retrieve the full Alsa details, with alsa-info.sh.
    To run alsa-info.sh,

    wget www.alsa-project.org/alsa-info.sh -O alsa-info.sh && bash alsa-info.sh


    You are prompted to send the details to the alsa-project.org website; select Yes and write down the URL you will be given. This URL has your soundcard information; reply here with this URL.

  3. #3
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    Re: Realtek ALC272. Empathy kills microphone

    Quote Originally Posted by simosx View Post
    This URL has your soundcard information; reply here with this URL.
    Hi, simosx!

    Here is the URL:
    http://www.alsa-project.org/db/?f=16...48907c77fc340c

  4. #4
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    Re: Realtek ALC272. Empathy kills microphone

    Quote Originally Posted by uaaquarius View Post
    Your Alsa settings look fine. You specify the Alsa model 'toshiba', probably following some instructions from other sources.

    According to
    http://www.mjmwired.net/kernel/Docum...-Models.txt#91
    the ALC272 does not have a 'toshiba' model.
    Does sound work for you if you unset the model? Setting it to 'toshiba' might be an issue.

    I think Ekiga does not support Pulseaudio yet and I am not sure about Pidgin.

    What I would recommend (after fixing the 'toshiba') is to kill PulseAudio and run it again as

    pulseaudio -vvvv

    which will show lots of debugging information. Try to perform a recording with the sound recorder and observe the output.

    Then, try out empathy. You can try with voice-only call, to eliminate any video interactions.

  5. #5
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    Re: Realtek ALC272. Empathy kills microphone

    Hi, simosx!

    Yes, "toshiba" was added by me when I tried to fix the microphone

    OK, I commented it out and restarted pulseaudio. Not sure if I restarted it correctly, I used those commands:
    Code:
    gksu /etc/init.d/pulseaudio stop
    gksu killall pulseaudio
    gksu /etc/init.d/pulseaudio start
    Then I run
    Code:
    pulseaudio -vvvv
    which resulted in
    Code:
    I: main.c: setrlimit(RLIMIT_NICE, (31, 31)) failed: Operation not permitted
    I: main.c: setrlimit(RLIMIT_RTPRIO, (9, 9)) failed: Operation not permitted
    D: core-rtclock.c: Timer slack is set to 50 us.
    D: core-util.c: RealtimeKit worked.
    I: core-util.c: Successfully gained nice level -11.
    I: main.c: This is PulseAudio 0.9.21-63-gd3efa-dirty
    D: main.c: Compilation host: i486-pc-linux-gnu
    D: main.c: Compilation CFLAGS: -g -O2 -g -Wall -O3 -Wall -W -Wextra -pipe -Wno-long-long -Winline -Wvla -Wno-overlength-strings -Wunsafe-loop-optimizations -Wundef -Wformat=2 -Wlogical-op -Wsign-compare -Wformat-security -Wmissing-include-dirs -Wformat-nonliteral -Wold-style-definition -Wpointer-arith -Winit-self -Wdeclaration-after-statement -Wfloat-equal -Wmissing-prototypes -Wstrict-prototypes -Wredundant-decls -Wmissing-declarations -Wmissing-noreturn -Wshadow -Wendif-labels -Wcast-align -Wstrict-aliasing=2 -Wwrite-strings -Wno-unused-parameter -ffast-math -Wp,-D_FORTIFY_SOURCE=2 -fno-common -fdiagnostics-show-option
    D: main.c: Running on host: Linux i686 2.6.32-24-generic #39-Ubuntu SMP Wed Jul 28 06:07:29 UTC 2010
    D: main.c: Found 2 CPUs.
    I: main.c: Page size is 4096 bytes
    D: main.c: Compiled with Valgrind support: no
    D: main.c: Running in valgrind mode: no
    D: main.c: Running in VM: no
    D: main.c: Optimized build: yes
    D: main.c: All asserts enabled.
    I: main.c: Machine ID is 084cdccf7136c823047702a34c4b9a8e.
    I: main.c: Session ID is 084cdccf7136c823047702a34c4b9a8e-1281390582.698301-1463995618.
    I: main.c: Using runtime directory /home/batky/.pulse/084cdccf7136c823047702a34c4b9a8e-runtime.
    I: main.c: Using state directory /home/batky/.pulse.
    I: main.c: Using modules directory /usr/lib/pulse-0.9.21/modules.
    I: main.c: Running in system mode: no
    E: pid.c: Daemon already running.
    E: main.c: pa_pid_file_create() failed.
    Then I tested Sound Recorder. It was it was working like a charm.
    Then I tested audio call with Empathy. It was quite bad: a lot of clunking like "chuk-chuk" on another computer (also running Ubuntu), some disruption, in general it was very hard to understood. The sound from another computer was heard excellently on this Acer.
    Then I tried video call with Empathy. Which killed the microphone again. It does not work (e.g. in Sound Recorder) until I reboot

    Here is my updated result of alsa-info.sh:
    http://www.alsa-project.org/db/?f=31...4b2e63c45e0ff3

    Any ideas?
    Thanks

  6. #6
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    Re: Realtek ALC272. Empathy kills microphone

    I would start with an alsa upgrade using the link in my sig. You'll probably still need to specify a model in alsa-base.conf, but it looks like a generic one. How many analog audio jacks are there? Digital? Number of sound channels supported?

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