@Ray-Ven I don't have the files lying around anymore. I will try to do it
again sometime. But until I get to it, you could really do it yourself if
you have a little experience with the terminal. I used git as per the
instructions on e.g. http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.9/.
Using git apply you can also apply the patches from
http://www.spinics.net/lists/intel-gfx/msg68973.html

Ray-Ven <email address hidden> schrieb am Sa., 14. Jan. 2017 um
23:59 Uhr:

> @Totally King, is it possible you let me try your patched kernel with my
> hardware? I'm not able to apply the patches and everything.
> I'd like to see if my bugreport is a duplicate of yours.
> https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1310594
>
> Thank you
>
> --
> You received this bug notification because you are subscribed to the bug
> report.
> https://bugs.launchpad.net/bugs/1467190
>
> Title:
>   No audio over DisplayPort MST
>
> Status in linux package in Ubuntu:
>   Triaged
>
> Bug description:
>   I have a Lenovo ThinkPad E540 with an Intel Haswell (4th Gen) HD
>   graphics controller connected to a OneLink Pro Dock. The Dock uses
>   DisplayPort (DP) 1.2 MST (multi stream transport) to provide both a DP
>   and a DVI port. My monitor is connected to the DP.
>
>   When I used kernels <= 3.16 audio worked fine, but the monitor would
>   flicker heavily. So I installed linux-lts-vivid (3.19) which fixed the
>   graphics problem (now I can see various DP? outputs in xrandr as
>   opposed to one before), but there is no DP audio output to chose
>   anymore.
>
>   I also tested the latest mainline kernel 4.1-rc8, where this bug still
>   exists. To further investigate I got these version's kernel sources,
>   applied 4 patches by Dave Airlie from the intel-gfx mailing list [1]
>   and tested this build (4.1-rc8+), which fixed the problem! I can play
>   sound over DP, the same way I can over HDMI or DP without MST.
>
>   I hope it is possible to backport these changes!
>
>   [1] haswell displayport MST audio support
>       http://www.spinics.net/lists/intel-gfx/msg68973.html
>
>   ProblemType: Bug
>   DistroRelease: Ubuntu 14.04
>   Package: linux-image-3.19.0-22-generic 3.19.0-22.22~14.04.1
>   ProcVersionSignature: Ubuntu 3.19.0-22.22~14.04.1-generic 3.19.8-ckt1
>   Uname: Linux 3.19.0-22-generic x86_64
>   ApportVersion: 2.14.1-0ubuntu3.11
>   Architecture: amd64
>   CurrentDesktop: Unity
>   Date: Sun Jun 21 01:44:30 2015
>   InstallationDate: Installed on 2014-01-06 (530 days ago)
>   InstallationMedia: Ubuntu 13.10 "Saucy Salamander" - Release amd64
> (20131016.1)
>   SourcePackage: linux-lts-vivid
>   UpgradeStatus: Upgraded to trusty on 2014-06-12 (373 days ago)
>   ---
>   ApportVersion: 2.20.1-0ubuntu2.4
>   Architecture: amd64
>   AudioDevicesInUse:
>    USER        PID ACCESS COMMAND
>    /dev/snd/controlC2:  stefan     2509 F.... pulseaudio
>    /dev/snd/controlC1:  stefan     2509 F.... pulseaudio
>    /dev/snd/controlC0:  stefan     2509 F.... pulseaudio
>   CurrentDesktop: Unity
>   DistroRelease: Ubuntu 16.04
>   HibernationDevice: RESUME=UUID=2ecc68b9-65e3-4cee-9b2a-d41ff651e4e8
>   InstallationDate: Installed on 2014-01-06 (1077 days ago)
>   InstallationMedia: Ubuntu 13.10 "Saucy Salamander" - Release amd64
> (20131016.1)
>   MachineType: LENOVO 20C6S00200
>   NonfreeKernelModules: nvidia_uvm nvidia_drm nvidia_modeset nvidia
>   Package: linux (not installed)
>   ProcFB: 0 inteldrmfb
>   ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.4.0-57-generic.efi.signed
> root=/dev/mapper/ubuntuvg-root ro nogpumanager quiet splash pcie_aspm=force
> intel_pstate=enable
>   ProcVersionSignature: Ubuntu 4.4.0-57.78-generic 4.4.35
>   RelatedPackageVersions:
>    linux-restricted-modules-4.4.0-57-generic N/A
>    linux-backports-modules-4.4.0-57-generic  N/A
>    linux-firmware                            1.157.6
>   Tags:  xenial
>   Uname: Linux 4.4.0-57-generic x86_64
>   UpgradeStatus: Upgraded to xenial on 2016-12-15 (3 days ago)
>   UserGroups: adm bumblebee cdrom dip lp lpadmin plugdev sambashare staff
> sudo vboxusers wireshark
>   _MarkForUpload: True
>   dmi.bios.date: 09/23/2016
>   dmi.bios.vendor: LENOVO
>   dmi.bios.version: J9ET9EWW (2.24 )
>   dmi.board.asset.tag: Not Available
>   dmi.board.name: 20C6S00200
>   dmi.board.vendor: LENOVO
>   dmi.board.version: Not Available
>   dmi.chassis.asset.tag: No Asset Information
>   dmi.chassis.type: 10
>   dmi.chassis.vendor: LENOVO
>   dmi.chassis.version: Not Available
>   dmi.modalias:
> dmi:bvnLENOVO:bvrJ9ET9EWW(2.24):bd09/23/2016:svnLENOVO:pn20C6S00200:pvrThinkPadEdgeE540:rvnLENOVO:rn20C6S00200:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable:
>   dmi.product.name: 20C6S00200
>   dmi.product.version: ThinkPad Edge E540
>   dmi.sys.vendor: LENOVO
>
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>