Red Hat Bugzilla – Bug 493489
Soundcard not working after 5.3 upgrade
Last modified: 2014-01-29 04:20:27 EST
Description of problem: After upgrading from Centos 5.2 rebuild to 5.3 sounds are no more audible except when using system-config-soundcard.
How reproducible: Audio or video playback using different players.
Actual results: No audio is heard.
Expected results: Audio playback.
Additional info: After upgrading from 5.2 to 5.3 I installed the Nvidia driver for my video card.
Do you hear sound from system-config-soundcard test?
Yes, that is the only playback working.
Then it's some problem with configuration rather than general sound failure...you may check the affected applications.
That was my thought too, but I tried many different applications and browsers.
Aplay too doesn't work if launched from CLI, the system-config-soundcard is the only application that can reproduce a sound (the test wave file).
I think something changed during the upgrade from 5.2 to 5.3 becuase that is the only (except nvidia driver post installation) operation I made between the working and not working condition.
I checked with alsamixer and found all the parameters set to zero, modifing them obtained no results (the only sound working was still the test wave from system-config-soundcard).
After executing the command alsaunmute -0 I can hear all sounds.
There's probably something muting the card (why does it play the test wave?) during the upgrade from CentOS-5.2 to CentOS-5.3.
And it mutes after every reboot.
Linking to the bug filed on Centos:
after upgrading to 5.6 I cannot hear any sound.
I updated the CentOS bug uploading a couple of log files from system-config-soundcard.
Can anyone have a look at this?
Moved to alsa-libs, it should set some reasonable default value.
Closing, but if the problem persists with the latest RHEL5 release, reopen and attach output from 'alsa-info.sh --no-upload'.