** Changed in: linux
Status: Unknown => Fix Released
** Changed in: linux
Importance: Unknown => Critical
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https://bugs.launchpad.net/bugs/1657994
Title:
The bug has been fixed with this commit upstream drm-tip repository (with cc to
stable):
https://cgit.freedesktop.org/drm-tip/commit/?id=d81fb7fd9436e81fda67e5bc8ed0713aa28d3db2
Note it also affects Zesty.
** Bug watch added: freedesktop.org Bugzilla #101583
[Expired for linux (Ubuntu Yakkety) because there has been no activity
for 60 days.]
** Changed in: linux (Ubuntu Yakkety)
Status: Incomplete => Expired
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[Expired for linux (Ubuntu) because there has been no activity for 60
days.]
** Changed in: linux (Ubuntu)
Status: Incomplete => Expired
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Do you have any alsa/pulseaudio config?
This can be quickly verified by running "vanilla" Ubuntu.
16.04: http://cdimage.ubuntu.com/xenial/daily-live/current/
17.04: http://cdimage.ubuntu.com/daily-live/current/
If both of them work, then it's probably related to your config setting.
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You
I had been trying to cherry-pick patches from the working Xenial kernel
to mainline, and got bogged down with build issues. Back to the
bisection:
This kernel ...
http://kernel.ubuntu.com/~jsalisbury/lp1657994/linux-image-4.4.0-040400-generic_4.4.0-040400.201702021530_amd64.deb
.. does not work.
** Changed in: linux (Ubuntu)
Status: Confirmed => Incomplete
** Changed in: linux (Ubuntu Yakkety)
Status: Confirmed => Incomplete
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I would like to add some information to this bug report, which may or may not
be relevant.
There seems to be a general problem with HDMI audio in recent kernel versions.
I am using Debian kernel packages, on an AMD64 system with a Radeon R9-280
video card:
01:00.0 VGA compatible controller:
We are bisecting between those two kernel versions to identify the
commit that introduced this regression. Some of the test kernels I post
will be bad and some will be good. At the end of the testing the bisect
will point to one particular commit.
I built the first test kernel, up to the
For this kernel, no audio. Failure mode is like 4.4 mainline.
Just to understand: the strategy is to bisect between two mainline
kernels with different failure modes (4.4 final and 4.5rc1), with the
hope that between the two there will be a good kernel?
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I started a kernel bisect between 4.4 final and v4.5-rc1. The kernel
bisect will require testing of about 7-10 test kernels.
I built the first test kernel, up to the following commit:
1289ace5b4f70f1e68ce785735b82c7e483de863
The test kernel can be downloaded from:
Yes, 4.4.0-21 is good, just like 4.4.0-59.
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https://bugs.launchpad.net/bugs/1657994
Title:
Regression: HDMI audio produces no sound (Skylake NUC)
Status in linux package
Can you test the 4.4.0-21 kernel next:
https://launchpad.net/~canonical-kernel-team/+archive/ubuntu/ppa/+build/9594168
If it is good, we can bisect between 4.4.0-21 and 4.6.0-10.
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Both kernels behave like any of the kernels from 4.5: no sound on HDMI.
Recapping:
Ubuntu 4.4.0-59: HDMI audio works properly
Mainline 4.4 (any): i915 drm driver does not seem to support Skylake,
HDMI audio not enumerated
All of the below kernels exhibit the same problem: HDMI produces no
Can you test the following two early Yakkety kernels:
4.6.0-10:
https://launchpad.net/~canonical-kernel-team/+archive/ubuntu/bootstrap/+build/10600030
4.8.0-11:
https://launchpad.net/~canonical-kernel-team/+archive/ubuntu/unstable/+build/10923199
With these kernels, you need to install both
Kernel behavior summary:
Ubuntu 4.4.0-59: HDMI audio works properly
Mainline 4.4 (any): i915 drm driver does not seem to support Skylake,
HDMI audio not enumerated
All of the below kernels exhibit the same problem: HDMI produces no sound
Mainline 4.5rc1
Mainline 4.5 final
Mainline 4.6 final
** Tags added: kernel-bug-exists-upstream
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https://bugs.launchpad.net/bugs/1657994
Title:
Regression: HDMI audio produces no sound (Skylake NUC)
Status in linux package
I'd like to perform a bisect to figure out what commit caused this
regression. We need to identify the earliest kernel where the issue
started happening as well as the latest kernel that did not have this
issue.
Can you test the following kernels and report back? We are looking for
the first
Would it be possible for you to test the latest upstream kernel? Refer
to https://wiki.ubuntu.com/KernelMainlineBuilds . Please test the latest
v4.10 kernel[0].
If this bug is fixed in the mainline kernel, please add the following
tag 'kernel-fixed-upstream'.
If the mainline kernel does not fix
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