Suspend from tty script

suspend-tty.sh

#!/bin/bash

# Gnome-shell+Nvidia sometimes fails to suspend, os instead change to tty3 and suspend from there, then return to tty2.

set -e

# Current wakeup count
WAKEUPS=$(cat /sys/power/wakeup_count)

# switch to TTY3 and suspend
echo "Switching to TTY3 and suspending..."
chvt 3
sleep 1
systemctl suspend

sleep 1

# Wait until resumed
while [ "$(cat /sys/power/wakeup_count)" -eq "$WAKEUPS" ]; do
    echo "System is suspended... waiting to resume."
    sleep 1
done

echo "Resumed from suspend, switching to TTY2."

# switch back to TTY2
chvt 2

# Get last wakeup moment?
# stat /sys/power/wakeup_count 

#   File: /sys/power/wakeup_count
#   Size: 4096      	Blocks: 0          IO Block: 4096   regular file
# Device: 0,25	Inode: 1310        Links: 1
# Access: (0644/-rw-r--r--)  Uid: (    0/    root)   Gid: (    0/    root)
# Context: system_u:object_r:sysfs_t:s0
# Access: 2025-10-27 23:40:13.625259807 +0200
# Modify: 2025-10-27 23:40:13.625259807 +0200
# Change: 2025-10-27 23:40:13.625259807 +0200