Problem with AC97 sound on Microsoft Xbox

Ed Schouten ed at
Thu Feb 8 17:56:20 UTC 2007


I'm running FreeBSD CURRENT on a Microsoft Xbox. For some reason I'm
seeing the following messages in my dmesg:

| pcm0: <nVidia nForce> port 0xd000-0xd0ff,0xd200-0xd27f mem 0xfec00000-0xfec00fff irq 6 at device 6.0 on pci0
| pcm0: AC97 reset timed out.
| pcm0: <Unknown AC97 Codec (id = 0x574d4c09)>
| pcm0: ac97 codec reports dac not ready
| pcm0: ac97 link rate calibration timed out after 1910570 us

The device does produce sound, but sometimes it sounds like its buffer
is underrun. Is this a known issue with regular nForce 1 motherboards as

 Ed Schouten <ed at>
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