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#!/bin/bash
# ========================================================================== #
# #
# KVMD - The main PiKVM daemon. #
# #
# Copyright (C) 2018-2023 Maxim Devaev <[email protected]> #
# #
# This program is free software: you can redistribute it and/or modify #
# it under the terms of the GNU General Public License as published by #
# the Free Software Foundation, either version 3 of the License, or #
# (at your option) any later version. #
# #
# This program 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 General Public License #
# along with this program. If not, see <https://www.gnu.org/licenses/>. #
# #
# ========================================================================== #
set -eE
set -x
# https://forums.raspberrypi.com/viewtopic.php?p=2202017
card="$1"
conn_id="$2"
test -n "$card"
test -n "$conn_id"
card_n="${card/card/}"
test -n "$card_n"
port=$(grep "^connector\[$conn_id\]:" "/sys/kernel/debug/dri/$card_n/state" | awk '{print $2}')
test -n "$port"
if [ "$port" = "HDMI-A-1" ]; then
if systemctl is-enabled -q kvmd-pass; then
status=$(head -n 1 "/sys/class/drm/$card-$port/status")
if [ "$status" = "connected" ]; then
systemctl restart kvmd-pass || true
fi
fi
fi
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