Sound recording does not work on Lenovo ThinkStation models S20 and D20

Solution Verified - Updated -

Environment

Lenovo ThinkStation S20 or D20 in these configurations:

  • Red Hat Enterprise Linux 5.3 or later for the model S20
  • Red Hat Enterprise Linux 5.4 or later for the model D20

Issue

  • I am unable to record sound on my Lenovo ThinkStation models S20 and D20.

Resolution

These are the settings that are required to get record/play to work on a Lenovo ThinkStation S20/D20:

  • Selected device =HAD Intel (Alsa mixer)
  • Volume Control preferences - check all boxes so all controls are displayed.
  • Volume Control Panel - Ensure Playback In-gain is not muted and turned up to 75% or greater.
  • Alsamixer Capture panel/Volume Control Panel – Ensure correct Microphone is selected for all input sources.
  • Mic = rear microphone jack
    • Front Mic = front microphone jack
    • Ensure all capture bars are 75% on
    • Line-in/Line are 75%

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