# This file is part of systemd.
#
# The lookup keys are composed in:
#   90-snd_hda_intel.rules
#
# Note: The format of the "snd_hda_intel:" prefix match key is a
# contract between the rules file and the hardware data, it might
# change in later revisions to support more or better matches, it
# is not necessarily expected to be a stable ABI.
#
# Match string formats:
# snd_hda_intel:<pci-subsys-vendor-id>:<pci-subsys-device-id>:dmi:<dmi string>
#
# Allowed properties are:
#    SND_HDA_INTEL_POWERSAVE=<powersave-value>
#
# Typical use is SND_HDA_INTEL_POWERSAVE=0 to disable codec autosuspend on
# troublesome devices, where a plopping or crackling sound is produced each
# time the codec is turned on/off. Note the need to disable coded autosuspend
# almost always points to a problem in the kernel hda-codec drivers.
#
# To add local entries, create a new file
#   /etc/udev/hwdb.d/91-snd_hda_intel-local.hwdb
# and add your rules there. To load the new rules execute (as root):
#   systemd-hwdb update
#   udevadm trigger
#
# If this fixes the plopping or crackling sounds for you please submit your
# changes upstream. As mentioned the need for an entry here almost always points
# to a bug in the kernel hda-codec drivers. Therefor you MUST submit a bug for
# your issue in the kernel bugzilla before we can accept your changes to this
# file, go to  https://bugzilla.kernel.org/enter_bug.cgi?product=Drivers
# and as component choose "Sound(ALSA)", when done add a comment to your
# entry to this file with a link to the filed bug
#
# When ready to submit your changes, preferably send them as a pull request to
#   https://github.com/systemd/systemd
# or create a bug report on https://github.com/systemd/systemd/issues and
# include your new rules, a description of the device, and the output of
#   udevadm info --export-db
#
# For hwdb format and systemd behavior:
#   https://www.freedesktop.org/software/systemd/man/hwdb.html
#
# Sort by brand, model

#########################################
# Asrock
#########################################

# Asrock B150M Pro 4S/D3, example entry, not needed
# https://bugzilla.kernel.org/show_bug.cgi?id=109051
snd_hda_intel:0x1849:0x5892:dmi:*rvnASRock:rnB150MPro4S/D3:*
 SND_HDA_INTEL_POWERSAVE=0