[Bug 101900] No HDMI HBR audio on Polaris (no TrueHD, no Atmos, no Neo:X, no HD Master audio) and static noise in sound when LPCM

bugzilla-daemon at freedesktop.org bugzilla-daemon at freedesktop.org
Fri Dec 22 13:31:46 UTC 2017


--- Comment #18 from Direx <direx at betriebsdirektor.de> ---
(In reply to Michel Dänzer from comment #17)
> FWIW, according to comments on https://lwn.net/Articles/740916/:
> * HDMI sinks complying with the relevant specs only accept Dolby TrueHD with
> HDCP enabled.
> * There are buggy HDMI sinks which only play some other "high quality" bit
> streams with HDCP enabled.

The article does not say anything at all about HBR audio. Just one comment and
I also doubt that this is true. Where is that spec? I have tested quite a few
GPUs (Intel with i915, Nvidia, r600) and all of them had proper HDMI audio/HBR
support, which was completely unrelated to HDCP.

Even on Windows HBR audio does not have anything to do with HDCP. I am not
using HDCP there either and my RX480 properly passes all audio formats to my
AVR on Windows.

>From this bug report it looks like AMD has completely given up on HTPC people
and leaves this area entirely to Intel.

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