On 04.02.2011 00:37, Stephen Warren wrote:
I have written a document re: how to understand and trouble-shoot issues with audio-over-HDMI on NVIDIA GPUs. It's available at:
ftp://download.nvidia.com/XFree86/gpu-hdmi-audio-document/gpu-hdmi-audio.html
The intent is to provide all the support information I've given various people on support forums in a centralized place.
Hope this helps!
A nice document, thanks :)
A couple of comments:
Early chipsets (ION an earlier) do not support PD or ELD information. In this case, the ALSA driver assumes that a monitor is always attached, and supports "basic audio” (stereo 16-bit PCM only).
The ALSA driver actually assumes that the monitor supports everything.
10.3. Under-Enumeration of Logical Devices
This section misses one patch: http://git.alsa-project.org/?p=alsa-lib.git;a=commitdiff;h=e6d5dcf1f62598460...
12.4. Verify Your ELD Is Valid
This section has "44100 48000 88200" multiple times. Maybe one should mention that those are currently shown incorrectly (as per "[alsa-devel] HDA - hdmi_show_short_audio_desc puts wrong rates in eld#N"). Maybe also in chapter 10, though it is a very minor issue (it just affects the display, not the actual used values).