Bug 204331

Summary:	amdgpu audio parameter not functional
Product:	Drivers	Reporter:	grmat
Component:	Video(DRI - non Intel)	Assignee:	drivers_video-dri
Status:	RESOLVED DOCUMENTED
Severity:	normal	CC:	alexdeucher
Priority:	P1
Hardware:	All
OS:	Linux
Kernel Version:	5.2.2	Subsystem:
Regression:	No	Bisected commit-id:

Description grmat 2019-07-26 17:11:44 UTC

GPU: Polaris 10/Ellesmere (RX 480)

According to the documentation amdgpu.audio=0 should disable audio functionality. However, the HDMI audio devices are still present.

Comment 1 Alex Deucher 2019-07-26 17:33:34 UTC

Not a bug.  Two things:
1. The audio parameter just ignores the speakers in the display and treats it like a display without speakers.  It does not make the audio device disappear.
2. The audio parameter only works with the legacy non-DC display support (amdgpu.dc=0)

Comment 2 grmat 2019-07-27 06:43:35 UTC

Thanks for your reply.

1. But the sound *is* playing, b/c DC is default.
2. I've seen it (only w/o DC) is documented in recent kernel docs. I previously put confidence in the modinfo output, where it isn't.