Package: laptop-mode-tools Version: 1.45-1 Severity: wishlist Tags: patch USB Autosuspend mode is good for the hub and devices. These days USB is the way to go and most laptops come with 4 USB ports. When running on battery, they are useless and drawing a lot of power.
Powertop, when run on a default Debian kernel/laptop-mode-tools, reports that USB autosuspend mode be enabled. I looked into powertop's usb.c implementation and am submitting a similar thing for laptop-mode-tools usb-autosuspend module. This should help save some more power. Ritesh -- System Information: Debian Release: lenny/sid APT prefers testing APT policy: (990, 'testing'), (500, 'unstable'), (101, 'experimental') Architecture: i386 (i686) Kernel: Linux 2.6.26-custom (SMP w/2 CPU cores) Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8) Shell: /bin/sh linked to /bin/dash Versions of packages laptop-mode-tools depends on: ii lsb-base 3.2-20 Linux Standard Base 3.2 init scrip ii util-linux 2.13.1.1-1 Miscellaneous system utilities Versions of packages laptop-mode-tools recommends: ii acpid 1.0.6-16 Utilities for using ACPI power man ii hal 0.5.11-6 Hardware Abstraction Layer ii hdparm 8.9-2 tune hard disk parameters for high ii sdparm 1.02-1 Output and modify SCSI device para laptop-mode-tools suggests no packages. -- no debconf information
# # Configuration file for Laptop Mode Tools module usb autosuspend. # # For more information, consult the laptop-mode.conf(8) manual page. # ############################################################################### # USB AutoSuspend power saving settings # --------------------------- # # If you enable this setting, laptop mode tools will automatically set the # USB Devices into Auto Suspend mode. USB Devices will get auto suspended, when # running on battery, after a specified interval; the default being 2 seconds. # ############################################################################### # Control USB Auto Suspend? CONTROL_USB_AUTOSUSPEND=1
#! /bin/sh # # Laptop mode tools module: USB Auto Suspend power saving mode. # if [ x$CONTROL_USB_AUTOSUSPEND = x1 ] ; then if [ $ON_AC -eq 1 ]; then if [ -d /sys/bus/usb/devices ]; then for usb_device in /sys/bus/usb/devices/*; do usb_device=`basename $usb_device`; if [ -f /sys/bus/usb/devices/$usb_device/power/autosuspend ]; then echo 2 > /sys/bus/usb/devices/$usb_device/power/autosuspend; $LM_VERBOSE && echo "Disabling auto suspend mode for usb device $usb_device." >> $OUTPUT fi if [ -f /sys/bus/usb/devices/$usb_device/power/level ]; then echo "auto" > /sys/bus/usb/devices/$usb_device/power/level; $LM_VERBOSE && echo "Setting auto power level for usb device $usb_device." >> $OUTPUT fi done else #This will rarely happen. $LM_VERBOSE && echo "There are no USB devices." >> $OUTPUT fi else if [ -d /sys/bus/usb/devices ]; then for usb_device in /sys/bus/usb/devices/*; do usb_device=`basename $usb_device`; if [ -f /sys/bus/usb/devices/$usb_device/power/autosuspend ]; then echo 0 > /sys/bus/usb/devices/$usb_device/power/autosuspend; $LM_VERBOSE && echo "Enabling auto suspend mode for usb device $usb_device." >> $OUTPUT fi if [ -f /sys/bus/usb/devices/$usb_device/power/level ]; then echo "auto" > /sys/bus/usb/devices/$usb_device/power/level; $LM_VERBOSE && echo "Enabling auto power level for usb device $usb_device." >> $OUTPUT fi done else #This will rarely happen. $LM_VERBOSE && echo "There are no USB devices." >> $OUTPUT fi fi else $LM_VERBOSE && echo "USB auto suspend is disabled." >> $OUTPUT fi
