Ubuntuでsuspendしても自動で復帰してしまうのを抑止する https://dothiko.hatenablog.com/entry/2014/04/23/201923

disable-device-as-wakeup.service

[Unit]
Description=Disable devices as wakeup

[Service]
ExecStart=/usr/local/bin/disable_auto_resume_of_suspend.sh
Type=oneshot

[Install]
WantedBy=multi-user.target

disable_auto_resume_of_suspend.sh

#!/bin/bash

WAKEUPS=$(cat /proc/acpi/wakeup | grep enabled | awk '{ print $4 }' | sed -e "s/pci:\(.[^:]\)/\1/g")

for w in $WAKEUPS
do
  echo $w
  echo 'disabled' > /sys/bus/pci/devices/$w/power/wakeup
done

"How do I make changes to /proc/acpi/wakeup permanent?"
https://askubuntu.com/questions/152403/how-do-i-make-changes-to-proc-acpi-wakeup-permanent

上URL https://askubuntu.com/questions/152403/how-do-i-make-changes-to-proc-acpi-wakeup-permanent にあるように、systemctlで起動時に実行するようにする

/etc/systemd/system/にdisable-device-as-wakeup.serviceを置いてsystemctl enable disable-device-as-wakeup.service