[Bug 101583] [KBL] intel NUC6CAYH no HDMI audio output

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=101583

--- Comment #5 from Kuta <admin at kuta.bid> ---
Ok, short answer : It works - sorta...ish

Longer answer : Its very, VERY flakey. Breathe on it & sound stops working
again. Totem kills the sound reliably so uninstall it & use VLC.


I've tried to document the process of getting sound via HDMI on Ubuntu 16.10
clearly for the next person.


Note 1 : The package 'oem-audio-hda-daily-dkms' does not exist in the Graphics
drivers PPA.

Note 2 : Ubuntu 16.10 is the most recent being packaged for by the ALSA PPA
guys.

Note 3 : Keep your resolution no higher than 1920x1080 or no sound via HDMI
again..

Note 4 : When sound via inevitably stops, Log out & back in. Check sound mixer
settings & return them to  HDMI/Display port/Stereo etc again.


Follow these steps to resolve the issue:


1.  Make sure that your system is up-to-date using the Update Manager.

    In a Terminal window, run the following:

    sudo apt-get update && sudo apt-get upgrade

    Reboot the system.


2.  Add the following groups to your account:

    audio, pulse, pulse-access, video, voice

    Install the better user/groups gui to manage this:
    sudo apt-get install gnome-system-tools


3.  Add the Graphics Drivers PPA

    [ Oibaf : Updated and Optimized Open Graphics Drivers repo ]
    [ https://launchpad.net/~oibaf/+archive/ubuntu/graphics-drivers ]

    In a Terminal window, run the following:

    sudo add-apt-repository ppa:oibaf/graphics-drivers
    sudo apt-get update

    Reboot the system.

4.  Add the ALSA PPA (all versions of Ubuntu up to 16.10, 17.04 NOT supported)

    [ ALSA daily build snapshots repo ]
    [
https://code.launchpad.net/~ubuntu-audio-dev/+archive/ubuntu/alsa-daily/+index
]

    In a Terminal window, run the following:

    sudo add-apt-repository ppa:ubuntu-audio-dev/alsa-daily
    sudo apt-get update && sudo apt-get install oem-audio-hda-daily-dkms

    Reboot the system.


5.  Make this directory if it does not exist under /etc/X11:
    sudo mkdir xorg.conf.d

    Create this new file:
    sudo nano /etc/X11/xorg.conf.d/20-intel.conf

    Paste this contecnt into the newly created file:

     Section "Device"
     Identifier "Intel Graphics"
     Driver "intel"
     # Option "SwapbuffersWait" "true"
     Option "AccelMethod" "SNA"
     # Option "AccelMethod" "UXA"
     Option "TearFree" "true"
     Option "DRI" "3"
     EndSection


To revert to standard Ubuntu graphics drivers type the following in a prompt
shell:

$ sudo apt-get install ppa-purge
$ sudo ppa-purge ppa:oibaf/graphics-drivers



To revert to standard Ubuntu ALSA drivers type the following in a prompt shell:

$ sudo apt-get install ppa-purge
$ sudo ppa-purge ppa:ubuntu-audio-dev

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