mythbuntu-bugs team mailing list archive

[Brad Figg <brad.figg@xxxxxxxxxxxxx>]

Hi creg082004,

Please be sure to confirm this issue exists with the latest development release of Ubuntu.  ISO CD images are available from http://cdimage.ubuntu.com/releases/ .  If the issue remains, please run the following command from a Terminal (Applications->Accessories->Terminal).  It will automatically gather and attach updated debug information to this report.
        
apport-collect -p alsa-base 275289
        
Also, if you could test the latest upstream kernel available that would be great.  It will allow additional upstream developers to examine the issue.  Refer to https://wiki.ubuntu.com/KernelMainlineBuilds .  Once you've tested the upstream kernel, please remove the 'needs-upstream-testing' tag.  This can be done by clicking on the yellow pencil icon next to the tag located at the bottom of the bug description and deleting the 'needs-upstream-testing' text.  Please let us know your results.
        
Thanks in advance.
        
    [This is an automated message.  Apologies if it has reached you inappropriately; please just reply to this message indicating so.]
    

** Tags added: kj-triage needs-required-logs

** Changed in: alsa-driver (Ubuntu)
       Status: New => Incomplete

-- 
Mythbuntu improperly supports Realtek ALC889A audio
https://bugs.launchpad.net/bugs/275289
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Status in Mythbuntu, Ubuntu derivative focused upon MythTV: Confirmed
Status in “alsa-driver” package in Ubuntu: Incomplete
Status in “linux-backports-modules-2.6.31” package in Ubuntu: New

Bug description:
I am using a Gigabyte MA790X-DS4 motherboard that has built-in Realtek ALC889A audio.  Mythbuntu detects this as ALC885 and the sound channels do not work properly.  For example:

1) Left and right sound channels are reversed.  (applies to analog outputs only; S/PDIF and Toslink works correctly)
2) When running speaker-test, the center channel activates with the left channel.
3) When running speaker-test, the center, side, rear, and subwoofer channels do not work.
4) When a stereo source such as music in VLC is played, all 8 channels are active and appear to play the same signal.

Note: When using the S/PDIF or Toslink outputs, everything works correctly.  Stereo sources are transmitted through the link as 2-channel PCM audio.   AC3 and DTS passthrough also work fine and carry all 6 (or 5.1) channels.