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Old 4th December 2010
ocicat ocicat is offline
Join Date: Apr 2008
Posts: 3,298

Originally Posted by tehsean View Post
The machine is a Fujitsu U820. Audio works, but the sound is very dirty: a lot of echo, artifact and static.
Here's my dmesg, audioctl, and mixerctl -v output:
OpenBSD 4.8 (GENERIC.MP) #359: Mon Aug 16 09:16:26 MDT 2010
cpu0: Intel(R) Atom(TM) CPU Z530 @ 1.60GHz ("GenuineIntel" 686-class) 1.60 GHz
real mem  = 1062490112 (1013MB)
avail mem = 1035124736 (987MB)
mainbus0 at root
bios0 at mainbus0: AT/286+ BIOS, date 01/16/09, BIOS32 rev. 0 @ 0xfdc39, SMBIOS rev. 2.4 @ 0xe5950 (34 entries)
bios0: vendor FUJITSU // Phoenix Technologies Ltd. version "Version 1.18" date 01/16/2009
bios0: FUJITSU LifeBook U820
According to the following:

Version 1.22 of the BIOS is available. You should check to see whether you can upgrade.

Secondly, ongoing discussion on the official misc@ mailing list indicates that it is not uncommon for manufacturers to incorrectly integrate audio functionality, or enter into contracts for crippled chipsets which have not been fully tested.

My recommendation would be to:
  • upgrade your BIOS (if possible) first.
  • If problems persist, consider installing -current second.
  • Provide all relevant details to misc@ or file a PR. The developers will be more interested in knowing whether the behavior is already resolved in -current, so if you don't answer this question upfront, it will be the first suggestion they make to you.
If you do end up posting or submitting a PR, be thorough in the information provided to the developers. Information on submitting can be found at the following:

It is wise to follow the recommendations advised on this page for either PR submissions or posting to misc@.
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