Bug 89479 - HDMI audio won't pass ac3 through another device
Summary: HDMI audio won't pass ac3 through another device
Alias: None
Product: DRI
Classification: Unclassified
Component: DRM/Radeon (show other bugs)
Version: unspecified
Hardware: x86-64 (AMD64) Linux (All)
: medium normal
Assignee: Default DRI bug account
QA Contact:
Depends on:
Reported: 2015-03-07 00:15 UTC by Chris Adams
Modified: 2019-11-19 09:02 UTC (History)
0 users

See Also:
i915 platform:
i915 features:


Description Chris Adams 2015-03-07 00:15:48 UTC
I have an AMD E-350 system (Radeon HD6310).  When I connect it directly to my receiver and play a file with AC3 audio, the receiver properly switches over to Dolby Digital decoding.  However, when I connect the HDMI to another device's pass-through (Vizio TV, Xbox One), the receiver stays in stereo mode and I get garbage audio.  Other devices can send Dolby Digital through (e.g. I tried a TiVo Roamio through the Vizio TV), so I know it can be done.

I'm guessing there's some bit of HDMI handshake not happening when the Radeon tries to switch modes and is connected to another device, but I don't know how to debug that.  Please let me know what I can do to figure this out.

I'm testing this with a trailer downloaded from hdtrailers.net, playing with either XBMC or VLC.
Comment 1 Chris Adams 2015-03-07 00:19:50 UTC
Sorry, left out that this is a Fedora 20 x86_64 system, up to date with Linux kernel 3.18.8.
Comment 2 Martin Peres 2019-11-19 09:02:14 UTC
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