Difference between revisions of "Lenovo Thinkpad SL500"

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(Powermanagement)
(/etc/acpid/handler.sh)
Line 115: Line 115:
 
         case "$2" in
 
         case "$2" in
 
             SLPB)  #echo -n mem >/sys/power/state ;;
 
             SLPB)  #echo -n mem >/sys/power/state ;;
 
+
    # Suspend the system and lock the screen
+
    # Suspend the system and lock the screen
    /usr/sbin/pm-suspend  
+
    /usr/sbin/pm-suspend  
    DISPLAY=:0.0 su -c - robert /usr/bin/slimlock
+
    DISPLAY=:0.0 su -c - robert /usr/bin/slimlock
    ;;
+
    ;;
 
             *)      logger "ACPI action undefined: $2" ;;
 
             *)      logger "ACPI action undefined: $2" ;;
 
         esac
 
         esac

Revision as of 23:03, 16 September 2011

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The support for this laptop is not as bad as it first seems. In fact, pretty much everything works fine. I am very happy with this machine!

While this guide if for the Thinkpad SL500, the steps should be easily applicable to the SL300 and SL400 models.

Introduction

Despite the Thinkpad name, the SL series laptops actually contain IdeaPad firmware, making it incompatible with the thinkpad_acpi modules. A new module, lenovo-sl-laptop has been written to expose most of the lost functionality. Thinkwiki has a page for the SL series with good general information and howtos.

Wireless

There are two possible wireless chipsets: Intel WiFi Link 5100 or a Atheros AR5007EG.

With the Intel WiFi Link 5100 series all functionality is supported out of the box. Follow the wireless setup guide for further information.

Sound

The sound card is supported in the kernel, and following the instructions in the Beginner's guide and also the ALSA guide should be sufficient to get sound working.

lenovo-sl-laptop Kernel Module

This modules is no longer required in 2.6.32 for most hotkey support; the mainline asus-laptop module has been patched to support these models. However, some features still require the lenovo-sl-laptop. Check the git commit for clarification. Note that it's recommened to blacklist the asus-laptop module when the lenovo-sl-laptop module is used to avoid problems with hotkey support.

This experimental kernel module was written to control bluetooth, hotkeys, fan, and screen brightness in place of the incompatible thinkpad_acpi module. A package is currently available in the AUR. After installation, be sure to load the module, and to load on startup, add lenovo-sl-laptop to the MODULES array in rc.conf.

Despite it's experimental status, it works quite well. Sadly, there is no support for the HDAPS.

Configuration

To allow control of the backlight, first edit /etc/modprobe.d/modprobe.conf as follows:

options lenovo-sl-laptop control_backlight=1

Then turn off ACPI control of the backlight by performing the command on startup.

echo 0 > /sys/module/video/parameters/brightness_switch_enabled

A preferable alternative is to add the following to your kernel boot line to do so on startup.

acpi_backlight=vendor

Building Manually

Instead of installing the AUR package, the module can built manually from source.

To do so, first obtain the source from here and perform the following

make
sudo install -m=644 -D lenovo-sl-laptop.ko /lib/modules/`uname -r`/kernel/lenovo_sl_laptop/lenovo-sl-laptop.ko
depmod -a
modprobe lenovo-sl-laptop control_backlight=1

The bluetooth light on the front of your laptop should turn on.

Finally, add lenovo-sl-laptop to your MODULES array in your rc.conf.

USB and SD auto mounting

Check out the Udev rules for automounting USB and sd cards, very handy.

Other notes

The SD card reader seems a bit buggy.

Untested

Fingerprint reader, Bluetooth, Modem.

Power management

This section covers tools and settings which help to establish a suitable power management to reduce power consumption and determine the optimal settings depending on the AC state. This is particularly useful for systems which use window managers rather than desktop environments and their power management.

/etc/rc.local

The /etc/rc.local enables fan control which requires the lenovo-sl-laptop module from AUR to be installed. Furthermore there must be entered the right path to the powermanagement.sh script.

#!/bin/bash
#
# /etc/rc.local: Local multi-user startup script.
#

# Enable fan control
echo 1 > /sys/devices/platform/lenovo-sl-laptop/hwmon/hwmon1/pwm1_enable
echo 70 > /sys/devices/platform/lenovo-sl-laptop/hwmon/hwmon1/pwm1

# Set settings according to AC state
exec /path/to/powermanagement.sh

/etc/acpid/handler.sh

The Acpid daemon is a very handy tool which listens for Acpi changes. However getting it to work with the Lenovo SL500 is not able by default as this laptop listens on different acpi signals. The following handler.sh changes the governor and the brightness level depending on whether the system is connected to AC or not. Furthermore it suspends the system using pm-suspend and locks the screen using slimlock after the lid is closed or the sleep button is pressed.

#!/bin/sh
# Default acpi script that takes an entry for all actions

# NOTE: This is a 2.6-centric script.  If you use 2.4.x, you'll have to
#       modify it to not use /sys

minspeed=`cat /sys/devices/system/cpu/cpu0/cpufreq/cpuinfo_min_freq`
maxspeed=`cat /sys/devices/system/cpu/cpu0/cpufreq/cpuinfo_max_freq`
setspeed="/sys/devices/system/cpu/cpu0/cpufreq/scaling_setspeed"

set $*

case "$1" in
    button/power)
        #echo "PowerButton pressed!">/dev/tty5
        case "$2" in
            PBTN|PWRF)  logger "PowerButton pressed: $2" ;;
            *)          logger "ACPI action undefined: $2" ;;
        esac
        ;;
    button/sleep)
       case "$2" in
           SLPB)   #echo -n mem >/sys/power/state ;;

		    # Suspend the system and lock the screen
		    /usr/sbin/pm-suspend 
		    DISPLAY=:0.0 su -c - robert /usr/bin/slimlock
	    ;;
           *)      logger "ACPI action undefined: $2" ;;
       esac
       ;;
    ac_adapter)
        case "$2" in
            AC0|ACAD|ADP0)
                case "$4" in
                    00000080)
                        echo -n $minspeed >$setspeed
                        #/etc/laptop-mode/laptop-mode start
			 # System is connected to AC 

			 # Set governor to performance level for both CPUs
			 echo "performance" > /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor
			 echo "performance" > /sys/devices/system/cpu/cpu1/cpufreq/scaling_governor

			 # Set brightness to maximum
			 echo "15" > /sys/class/backlight/acpi_video0/brightness
                    ;;
                    00000000)
                        echo -n $maxspeed >$setspeed
                        #/etc/laptop-mode/laptop-mode stop
			 # System is not connected to AC 
	
			 # Set governor to powersave level for both CPUs
			 echo "powersave" > /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor
			 echo "powersave" > /sys/devices/system/cpu/cpu1/cpufreq/scaling_governor
 
			 # Set brightness to a minimum level 
			 echo "5" > /sys/class/backlight/acpi_video0/brightness
                    ;;
                esac
                ;;
            *)  logger "ACPI action undefined: $2" ;;
        esac
        ;;
    battery)
        case "$2" in
            BAT0)
                case "$4" in
                    00000000)   #echo "offline" >/dev/tty5
                    ;;
                    00000001)   #echo "online"  >/dev/tty5
                    ;;
                esac
                ;;
            CPU0)	
                ;;
            *)  logger "ACPI action undefined: $2" ;;
        esac
        ;;
    button/lid)
        #echo "LID switched!">/dev/tty5
	 # Suspend the system and lock the screen
	 /usr/sbin/pm-suspend  
 	 DISPLAY=:0.0 su -c - user /usr/bin/slimlock
        ;;
    *)
        logger "ACPI group/action undefined: $1 / $2"
        ;;
esac

/etc/pm/sleep.d/60rc.local

This script executes the rc.local after suspend to ensure that the right settings according to AC state are set.

#!/bin/sh

. "${PM_FUNCTIONS}"

case $1 in
    resume|thaw)
        [ -e /etc/rc.local ] && /etc/rc.local &
        ;;
    *)
        exit $NA
        ;;
esac
exit 0

/path/to/powermanagement.sh

This script actually changes the governor and the brightness depending on the AC state.

#!/bin/bash

if [ "`sed -e "s/.[^ ]* *//" /proc/acpi/ac_adapter/AC0/state`" = "on-line" ]
        then
               # System is on-line
		# Set governor to performance level for both CPUs
		echo "performance" > /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor
		echo "performance" > /sys/devices/system/cpu/cpu1/cpufreq/scaling_governor

		# Set brightness to maximum
		echo "15" > /sys/class/backlight/acpi_video0/brightness
		
        else
               # System is off-line
		# Set governor to powersave level for both CPUs
		echo "powersave" > /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor
		echo "powersave" > /sys/devices/system/cpu/cpu1/cpufreq/scaling_governor

		# Set brightness to a minimum level
		echo "5" > /sys/class/backlight/acpi_video0/brightness
fi

References

Thread on the forums concerning configuration of Arch Linux on the SL series