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#1 2021-03-30 10:42:53

FriedrichNietzsche
Member
Registered: 2018-09-05
Posts: 41

Matebook X Pro 2018 issue with static noise

Hi,

I have here a Matebook X Pro 2018 which has the problem, that I can hear some kind of static noise over the speakers. It somewhat sounds like a mechanical hard drive, with louder noises if I do something, e.g. like turning the mouse wheel. I have this device now well over a year (and it is known to have some bult in problems because of a bad placed DAC next to the power circuitry) but I only noticed this noise after setting up Arch Linux (again) around two weeks ago. I don't use the notebook a lot but but from using it over a week about one year ago (with Arch Linux), I don't ever remember hearing this static noise. Another reason I think it is (mostly) linked with my Arch Linux install is that the static noise is way, way less pronounced (i can only hear it when i put my ear over the speaker), when I installed windows on it for testing purposes. So I would be grateful, if you can help me troubleshoot this. So far I only did some adjustments to pulseaudio but that didn't change anything. The audio device is a Intel Corporation Sunrise Point-LP HD audio (rev 21). Not sure what else information to provide. Just ask and I will happily deliver it.

/etc/pulse/daemon.conf

# This file is part of PulseAudio.
#
# PulseAudio is free software; you can redistribute it and/or modify
# it under the terms of the GNU Lesser General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# PulseAudio is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public License
# along with PulseAudio; if not, see <http://www.gnu.org/licenses/>.

## Configuration file for the PulseAudio daemon. See pulse-daemon.conf(5) for
## more information. Default values are commented out.  Use either ; or # for
## commenting.

daemonize = yes
; fail = yes
allow-module-loading = yes
; allow-exit = yes
; use-pid-file = yes
; system-instance = no
; local-server-type = user
; enable-shm = yes
; enable-memfd = yes
; shm-size-bytes = 0 # setting this 0 will use the system-default, usually 64 MiB
; lock-memory = no
; cpu-limit = no

high-priority = yes
; nice-level = -11

realtime-scheduling = yes
realtime-priority = 9

exit-idle-time = -1
; scache-idle-time = 20

; dl-search-path = (depends on architecture)

load-default-script-file = yes
default-script-file = /etc/pulse/default.pa

; log-target = auto
; log-level = notice
; log-meta = no
; log-time = no
; log-backtrace = 0

resample-method = speex-float-5
; avoid-resampling = false
; enable-remixing = yes
; remixing-use-all-sink-channels = yes
; enable-lfe-remixing = no
; lfe-crossover-freq = 0

flat-volumes = yes

; rlimit-fsize = -1
; rlimit-data = -1
; rlimit-stack = -1
; rlimit-core = -1
; rlimit-as = -1
; rlimit-rss = -1
; rlimit-nproc = -1
; rlimit-nofile = 256
; rlimit-memlock = -1
; rlimit-locks = -1
; rlimit-sigpending = -1
; rlimit-msgqueue = -1
; rlimit-nice = 31
; rlimit-rtprio = 9
; rlimit-rttime = 200000

default-sample-format = s24-32le
default-sample-rate = 192000
alternate-sample-rate = 44000
; default-sample-channels = 2
; default-channel-map = front-left,front-right

default-fragments = 5
default-fragment-size-msec = 2

; enable-deferred-volume = yes
deferred-volume-safety-margin-usec = 1
; deferred-volume-extra-delay-usec = 0

/etc/pulse/default.pa

#!/usr/bin/pulseaudio -nF
#
# This file is part of PulseAudio.
#
# PulseAudio is free software; you can redistribute it and/or modify it
# under the terms of the GNU Lesser General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# PulseAudio is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public License
# along with PulseAudio; if not, see <http://www.gnu.org/licenses/>.

# This startup script is used only if PulseAudio is started per-user
# (i.e. not in system mode)

.fail

### Automatically restore the volume of streams and devices
load-module module-device-restore
load-module module-stream-restore
load-module module-card-restore

### Automatically augment property information from .desktop files
### stored in /usr/share/application
load-module module-augment-properties

### Should be after module-*-restore but before module-*-detect
load-module module-switch-on-port-available

### Load audio drivers statically
### (it's probably better to not load these drivers manually, but instead
### use module-udev-detect -- see below -- for doing this automatically)
#load-module module-alsa-sink
#load-module module-alsa-source device=hw:1,0
#load-module module-oss device="/dev/dsp" sink_name=output source_name=input
#load-module module-oss-mmap device="/dev/dsp" sink_name=output source_name=input
#load-module module-null-sink
#load-module module-pipe-sink

### Automatically load driver modules depending on the hardware available
.ifexists module-udev-detect.so
load-module module-udev-detect tsched=0
.else
### Use the static hardware detection module (for systems that lack udev support)
load-module module-detect
.endif

### Automatically connect sink and source if JACK server is present
.ifexists module-jackdbus-detect.so
.nofail
load-module module-jackdbus-detect channels=2
.fail
.endif

### Automatically load driver modules for Bluetooth hardware
.ifexists module-bluetooth-policy.so
load-module module-bluetooth-policy
.endif

.ifexists module-bluetooth-discover.so
load-module module-bluetooth-discover
.endif

### Load several protocols
load-module module-dbus-protocol
.ifexists module-esound-protocol-unix.so
load-module module-esound-protocol-unix
.endif
load-module module-native-protocol-unix

### Network access (may be configured with paprefs, so leave this commented
### here if you plan to use paprefs)
#load-module module-esound-protocol-tcp
#load-module module-native-protocol-tcp
#load-module module-zeroconf-publish

### Load the RTP receiver module (also configured via paprefs, see above)
#load-module module-rtp-recv

### Load the RTP sender module (also configured via paprefs, see above)
#load-module module-null-sink sink_name=rtp format=s16be channels=2 rate=44100 sink_properties="device.description='RTP Multicast Sink'"
#load-module module-rtp-send source=rtp.monitor

### Load additional modules from GSettings. This can be configured with the paprefs tool.
### Please keep in mind that the modules configured by paprefs might conflict with manually
### loaded modules.
.ifexists module-gsettings.so
.nofail
load-module module-gsettings
.fail
.endif


### Automatically restore the default sink/source when changed by the user
### during runtime
### NOTE: This should be loaded as early as possible so that subsequent modules
### that look up the default sink/source get the right value
load-module module-default-device-restore

### Automatically move streams to the default sink if the sink they are
### connected to dies, similar for sources
load-module module-rescue-streams

### Make sure we always have a sink around, even if it is a null sink.
load-module module-always-sink

### Honour intended role device property
load-module module-intended-roles

### Automatically suspend sinks/sources that become idle for too long
load-module module-suspend-on-idle

### If autoexit on idle is enabled we want to make sure we only quit
### when no local session needs us anymore.
.ifexists module-console-kit.so
load-module module-console-kit
.endif
.ifexists module-systemd-login.so
load-module module-systemd-login
.endif

### Enable positioned event sounds
load-module module-position-event-sounds

### Cork music/video streams when a phone stream is active
load-module module-role-cork

### Modules to allow autoloading of filters (such as echo cancellation)
### on demand. module-filter-heuristics tries to determine what filters
### make sense, and module-filter-apply does the heavy-lifting of
### loading modules and rerouting streams.
load-module module-filter-heuristics
load-module module-filter-apply

### Make some devices default
#set-default-sink output
#set-default-source input

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#2 2021-04-01 06:50:50

FriedrichNietzsche
Member
Registered: 2018-09-05
Posts: 41

Re: Matebook X Pro 2018 issue with static noise

In the mean time I had also a look on Ubuntu and Manjaro. Using both of these distributions I don't have the problem. So it's definately something related to my configuration

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#3 2021-04-01 07:59:14

V1del
Forum Moderator
Registered: 2012-10-16
Posts: 21,425

Re: Matebook X Pro 2018 issue with static noise

snd_hda_intel has power saving enabled by default which can lead to this effect on certain chips, try

echo 0 | sudo tee /sys/module/snd_hda_intel/parameters/power_save

to adjust this during runtime anda /etc/modprobe.d/hdaintel.conf

options snd_hda_intel power_save=0

if you want to make this permanent

Outside of that, neither ubuntu nor manjaro will disable tsched on pulse by default so maybe trying to reenable that might help you as well.

Last edited by V1del (2021-04-01 08:00:59)

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#4 2021-04-01 16:25:34

FriedrichNietzsche
Member
Registered: 2018-09-05
Posts: 41

Re: Matebook X Pro 2018 issue with static noise

I had already tried that out, but thank you.

tsched=0 comes from my workstation, since I had the problem there that especially Spotify would produce crackling noises. Not needed on the laptop though it seems.

After doing some test installs to figure out when it starts I think I have found the main culprit. It is caused via tlp, when I set the CPU governor to performance.
Which is weird, because I also had that back then. And a pity, since it makes the device feel just a little bit snappier. But I guess I have to make that sacrifice for my sanity.

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