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This is a Analog Devices High-Definition Audio 1.0 controller


  • Chipset: AD1981HD
  • Interface: HD Audio 1.0

Linux OSS driver


Linux ALSA driver

This chip works with snd-hda-intel driver. Possible cracking noises can be avoided by adding the position_fix=2 optional argument for the module.

  • The AD1981HD installs by default in Debian. To get it to work you must first install it with alsaconf.

The modem and audio chip are very closely connected somehow. According to a bug in the BIOS, the modem disables the audio device, too. That seems to be the reason for most sound problem with this chip.

ThinkPads this chip may be found in