ubuntu fix deep sleep (change from s2idle)

gistfile1.txt

# check deep is not selected and also available
cat /sys/power/mem_sleep

# temp set
sudo su -
root@:~# echo "deep" > /sys/power/mem_sleep
exit

# test
systemctl suspend -i

# verify
journalctl -g suspend --reverse

# permaset in grub
sudo su -
root@:~# vi /etc/default/grub
# edit for GRUB_CMDLINE_LINUX_DEFAULT="quiet splash mem_sleep_default=deep"
root@:~# exit
sudo grub-mkconfig -o /boot/grub/grub.cfg