[alsa-devel] ALSA 1.0.25 broke AC3 passthrough?

Stephen Warren swarren at nvidia.com
Tue Feb 7 06:46:37 CET 2012

On 02/06/2012 04:38 AM, Jean-Yves Avenard wrote:
> Today, I installed 1.0.25 drivers and libraries...
> AC3 passthrough is completely broken.
> My hardware: NVidia GT430, hdmi output
> Device used:
> hdmi:CARD=NVidia,DEV=0,AES0=6,AES1=0x82,AES2=0x00,AES3=0x01
> on Ubuntu 10.04 LTS (but using manually built alsa)

Are you able to regress this to a smaller window? I did do some rework a
while back on the HDA driver to support newer GeForce GPUs' audio HW
better, and this potentially had impact on bitstream pass-through,
although it seemed to work at the time. Commits were:

384a48d ALSA: hda: HDMI: Support codecs with fewer cvts than pins
2def817 ALSA: hda: hdmi_eld_update_pcm_info: update a stream in place
3aaf898 ALSA: hda: Separate generic and non-generic implementations
74b654c ALSA: hda: Virtualize SPDIF out controls
7c93597 ALSA: hda: Allow multple SPDIF controls per codec


More information about the Alsa-devel mailing list