Ubuntu
alsa-driver package

  1. Bug #874535
  2. Comment #34

Comment 34 for bug 874535

Revision history for this message
Raymond (superquad-vortex2) wrote :

> Then I disconnected the cable from my case to the motherboard "Front panel audio connector (AAFP)" since I never use those jacks anyway. This simple hardware fix worked for me

did your computer chassis have a HDA front audio panel ?

http://www.intel.com/support/motherboards/desktop/sb/cs-015851.htm

http://en.wikipedia.org/wiki/Intel_High_Definition_Audio

The different signal assignments can cause trouble when AC'97 front-panel dongles are used with HDA motherboards and vice versa. An AC'97 dongle returns audio on pins 6 and 10 rather than a digital plug sensing signals. Consequently, a loud audio passage may make the HDA motherboard with AC'97 dongle believe that headphones and microphones are being plugged and unplugged hundreds of times per second. An AC'97 motherboard with an HDA dongle will route the AC'97 5 V audio supply (pin 7; silence) to the speakers instead of the desired left and right audio signals.