Slowed down sound on Intel NUC

daishy · 2016-02-25 17:41:23

hi everybody,

I've recently bought myself an intel NUC5i3 as a media-station connected to my tv. I've installed an Kubuntu 15.04 and an Archlinux and i'm mainly using the arch. Most of the time everything works fine, but sometimes audio/video won't play correctly. It is played very slow, as if i played the video/audio in slow-motion at about half of the normal speed. The problem doesn't distinguish between audio or video or programm (same effect in spotify, vlc, chromium+flash, chromium+html-video, firefox, ...)
This `seems` to occur at random (as in: i haven't found a way to reproduce the problem at will). I tried a restart, but even after a restart the problem stays. The Kubuntu-installation does not show this problem, even after restarting from a bugged arch-session.

As i unfortunately have not much of a clue where to look for the cause of this behaviour and what info to provide here, i've posted some infos i think are relevant below. If anything else is needed, please ask for it, i will provide the info as soon as i'm home

Thank you all very much in advance!

The NUC is connected to the TV via the mini-display-port to the TVs HDMI-Port. Phonon-VLC is the active (first) entry in the system-config.

[daishy@mediazombie ~]$ uname -a
Linux mediazombie 4.4.1-2-ARCH #1 SMP PREEMPT Wed Feb 3 13:12:33 UTC 2016 x86_64 GNU/Linux

lspci -v
00:1b.0 Audio device: Intel Corporation Wildcat Point-LP High Definition Audio Controller (rev 03)
        Subsystem: Intel Corporation Device 2057
        Flags: bus master, fast devsel, latency 32, IRQ 46
        Memory at aa130000 (64-bit, non-prefetchable) [size=16K]
        Capabilities: <access denied>
        Kernel driver in use: snd_hda_intel
        Kernel modules: snd_hda_intel
00:03.0 Audio device: Intel Corporation Broadwell-U Audio Controller (rev 09)
        Subsystem: Intel Corporation Device 2057
        Flags: bus master, fast devsel, latency 0, IRQ 49
        Memory at aa134000 (64-bit, non-prefetchable) [size=16K]
        Capabilities: <access denied>
        Kernel driver in use: snd_hda_intel
        Kernel modules: snd_hda_intel
00:02.0 VGA compatible controller: Intel Corporation Broadwell-U Integrated Graphics (rev 09) (prog-if 00 [VGA controller])
        Subsystem: Intel Corporation Device 2057
        Flags: bus master, fast devsel, latency 0, IRQ 48
        Memory at a9000000 (64-bit, non-prefetchable) [size=16M]
        Memory at b0000000 (64-bit, prefetchable) [size=256M]
        I/O ports at 3000 [size=64]
        Expansion ROM at <unassigned> [disabled]
        Capabilities: <access denied>
        Kernel driver in use: i915
        Kernel modules: i915

[daishy@mediazombie ~]$ pacman -Q | grep phonon
phonon-qt4 4.8.3-5
phonon-qt4-vlc 0.8.2-4
phonon-qt5 4.8.3-5
phonon-qt5-gstreamer 4.8.2-4
phonon-qt5-vlc 0.8.2-4

nTia89 · 2016-04-26 12:26:25

(in hope my post will not be seen as a necro-dumping attempt ...)

I have the same problem!!!

I'm on an XPS 9343 laptop (broadwell, i5-5500U), connected via miniDP <--> HDMI to an external monitor

using Arch Linux x86_64, kernel 4.5.1 (but the same happened with previous 4.4 series), latest software gnome 3.20 and especially no one edit (e.g. to mpv settings)
I "appreciate" this boring issue mainly on youtube (i.e. https://www.youtube.com/watch?v=2ebfSItB0oM wheter or not SD or HD), using firefox or chromium,
as well as local files, using mpv, both audio-only files e.g. .wav and movies e.g. .avi or .mkv.
As you, it appears randomly and usually a reboot temporarily solves the problem.

I can give you any other info if you indicate...

I compared dmesg from two reboots in a row; the first with ''broken'' audio; the only difference between them are these two lines; in the below lines I post differences:

>broken audio:

platform PNP0103:00: hash matches
acpi PNP0103:00: hash matches

>audio normal:

machinecheck machinecheck0: hash matches

unfortunately, I'm not able to diagnose the problem, nor I know to what these lines are related to; so I wait a more experienced user...
I can further help saying that I haven't installed acpi or anything else related, at least, explicitely

Last edited by nTia89 (2016-04-27 09:04:06)

nTia89 · 2016-04-30 13:25:33

I want to update my status:
even if sound is weird from speaker from external monitor, that is connected via miniDP <-> HDMI connector
while sound from laptop internal speaker is perfect, is normal!

last information I want to share and I hope will be useful is:
every time I play sound (doesn't matter the source) through internal speaker, I get this message in the dmesg output

[  468.554266] haswell-pcm-audio haswell-pcm-audio: FW loaded, mailbox readback FW info: type 01, - version: 00.00, build 77, source commit id: 876ac6906f31a43b6772b23c7c983ce9dcb18a19

Arch Linux

#1 2016-02-25 17:41:23

Slowed down sound on Intel NUC

#2 2016-04-26 12:26:25

Re: Slowed down sound on Intel NUC

#3 2016-04-30 13:25:33

Re: Slowed down sound on Intel NUC

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