76 lines
1.6 KiB
Bash
Executable File
76 lines
1.6 KiB
Bash
Executable File
#!/bin/sh
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usage () {
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cat <<EOF>&2
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Usage: ${0##*/}
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This script will toggle HDMI Audio (and set video properly). To do this
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automatically when the cable is plugged, add the following udev rule:
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$ cat /etc/udev/rules.d/hdmi.rules
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SUBSYSTEM=="drm", ACTION=="change", RUN+="/bin/sh $0"
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To get audio working on radeon, you may need to boot with the following kernel
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paremeter:
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radeon.audio=1
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You must be root. This script is Linux only.
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EOF
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}
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if [ "$(uname)" != "Linux" ]; then
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usage
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exit 1
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fi
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if [ "$(id -u)" -ne 0 ]; then
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usage
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exit 1
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fi
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ALSACONF="/etc/asound.conf"
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HDMI_STATUS="$(cat /sys/class/drm/card0-HDMI-A-1/status)"
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[ -z "$HDMI_STATUS" ] && exit
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APLAY_BUF="$(aplay -l | grep HDMI)"
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getprop () {
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echo "$APLAY_BUF" | awk -v prop="$1" '{for(i=1; i<NF; i++) if ($i == prop) { print substr($(i+1), 1,1); exit}}'
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}
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CARD="$(getprop card)"
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DEVICE="$(getprop device)"
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udevadm settle --timeout=2
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XRANDR_BUF="$(xrandr)"
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PRIMARY="$(echo "$XRANDR_BUF" | awk '/^[[:alnum:]-]+ connected/ {print $1; exit}')"
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HDMI="$(echo "$XRANDR_BUF" | awk '/^HDMI-[[:digit:]]+ connected/ {print $1; exit}')"
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echo "PRIMARY=[$PRIMARY], HDMI=[$HDMI]"
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## Video
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if [ -n "$HDMI" ]; then
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# xrandr --output "$PRIMARY" --auto --primary --output "$HDMI" --auto --noprimary --right-of "$PRIMARY"
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xrandr --output "$HDMI" --auto --noprimary --right-of "$PRIMARY"
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# else
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# xrandr --output "$HDMI" --off
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fi
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## Sound
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if [ "$HDMI_STATUS" = "connected" ]; then
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cat <<EOF > "$ALSACONF"
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pcm.!default {
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type hw
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card $CARD
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device $DEVICE
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}
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EOF
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chmod 644 "${ALSACONF}"
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echo "HDMI sound enabled"
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else
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rm -f "$ALSACONF"
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echo "HDMI sound disabled"
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fi
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