On Thu, Mar 30, 2017 at 9:35 AM, Pascal Wichmann pascal.wichmann@pa-w.de wrote:
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Hi,
Do you mean the issue is caused by the patches 1480992519-108079-1-git-send-email-libin.yang@intel.com?
I don't know whether the issues are caused directly by the specific patches; without them, digital audio does not work at all in my setup. Using analog audio however does not have the problems mentioned in my first email.
I can't see which patches are included you mentioned in the link.
I am building my kernel from drm-tip. The relevant patches enabling DP M ST audio seem to be "ALSA: hda - add DP mst verb support" [0] as well as "ALSA: hda - add DP MST audio support" [1].
Hi,
I recently updated my kernel to 4.11, and am experiencing similar problems as Pascal. I have a Skylake processor and DP output hooked up with a DP to HDMI cable to an Onkyo SR-606 receiver.
I can't get audio to work at all through my receiver anymore. I tried both DTS and PCM audio files. I bisected it to the above mentioned commit 9152085defb6426ce8f9989ca27e4450daefbd89 (ALSA: hda - add DP MST audio support).
Do you know if the DP MST audio mode is used in your case?
I don't know what DP MST is or how to tell if I'm using it. However, I noticed that when it does work, `aplay -L` gives me
hdmi:CARD=PCH,DEV=0 HDA Intel PCH, HDMI 0 HDMI Audio Output hdmi:CARD=PCH,DEV=1 HDA Intel PCH, HDMI 1 HDMI Audio Output
and when it doesn't, I get
hdmi:CARD=PCH,DEV=0 HDA Intel PCH, Generic Digital HDMI Audio Output
I think it is used; at least dp/hdmi audio does not work at all without building against drm-tip. (the outputs are all stated as unplugged and unavailable in pavucontrol for example) Is there any way to know for sure?
I tried building against drm-tip as well as v4.12-rc2, but observed the same issue. I am not using pulseaudio, but alsa directly.
Any help would be appreciated.
Thanks, Michael