18 lines
1.2 KiB
Plaintext
18 lines
1.2 KiB
Plaintext
# Disables power saving capabilities for snd-hda-intel when device is not
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# running on battery power. This is needed because it prevents audio cracks on
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# some hardware.
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ACTION=="add", SUBSYSTEM=="sound", KERNEL=="card*", DRIVERS=="snd_hda_intel", TEST!="/run/udev/snd-hda-intel-powersave", \
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RUN+="/usr/bin/bash -c 'touch /run/udev/snd-hda-intel-powersave; \
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[[ $$(cat /sys/class/power_supply/BAT0/status 2>/dev/null) != \"Discharging\" ]] && \
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echo $$(cat /sys/module/snd_hda_intel/parameters/power_save) > /run/udev/snd-hda-intel-powersave && \
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echo 0 > /sys/module/snd_hda_intel/parameters/power_save'"
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SUBSYSTEM=="power_supply", ENV{POWER_SUPPLY_ONLINE}=="0", TEST=="/sys/module/snd_hda_intel", \
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RUN+="/usr/bin/bash -c 'echo $$(cat /run/udev/snd-hda-intel-powersave 2>/dev/null || \
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echo 10) > /sys/module/snd_hda_intel/parameters/power_save'"
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SUBSYSTEM=="power_supply", ENV{POWER_SUPPLY_ONLINE}=="1", TEST=="/sys/module/snd_hda_intel", \
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RUN+="/usr/bin/bash -c '[[ $$(cat /sys/module/snd_hda_intel/parameters/power_save) != 0 ]] && \
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echo $$(cat /sys/module/snd_hda_intel/parameters/power_save) > /run/udev/snd-hda-intel-powersave; \
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echo 0 > /sys/module/snd_hda_intel/parameters/power_save'"
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