/etc/pm/power.d/usb_autosuspend is in powernap-common 2.18-0ubuntu2.
This file is owned by root:root, with mode 0o755.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 | #!/bin/sh
#
# usb_autosuspend: Auto suspend usb core.
#
# Copyright (C) 2010 Canonical Ltd.
#
# Authors: Andres Rodriguez <andreserl@ubuntu.com>
#
# 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, version 3 of the License.
#
# 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 <http://www.gnu.org/licenses/>.
#for i in /sys/bus/usb/devices/*/power/autosuspend; do echo 1 > $i; done
#for i in /sys/bus/usb/devices/*/power/level; do echo auto > $i; done
set_usb_autosuspend() {
for i in /sys/bus/usb/devices/*/power/autosuspend;
do
echo $1 > $i
done
for i in /sys/bus/usb/devices/*/power/level;
do
echo $2 > $i
done
}
help() {
echo "Auto suspend USB bus to save power."
}
case $1 in
true)
set_usb_autosuspend 1 auto ;;
false)
set_usb_autosuspend 2 on ;;
help)
help;;
*)
exit $NA ;;
esac
|