NAME

       acpitool - a Linux ACPI client, allowing you to query or set ACPI values

SYNOPSIS

       acpitool [ -aAbBcefFhjlmnosStTvVwWz ]

DESCRIPTION

       acpitool is a Linux ACPI client. It simply reads /proc/acpi or /sys/class entries and presents the output
       in a meaningfull, human-readable format.

       It provides a.o. information on battery status, AC adapter presence, thermal reading, etc.  This  command
       is most useful on laptops with an ACPI compliant BIOS and a Linux kernel, preferably from the 2.6 series,
       with ACPI enabled.

       Acpitool also allows the machine to be put into standby, if your laptop supports it.

       If your laptop is a Toshiba , it allows you to set the LCD brighness level and toggle the fan on/off.

       If you have an Asus laptop, it can also set the LCD brightness level, switch the LCD panel on or off, and
       control the mail led and wireless led.

       If  you  have  an IBM Thinkpad laptop, it can once again set the LCD brightness level, and also eject the
       ultrabay device.

OPTIONS

       -a, --ac_adapter
              Show AC adapter presence

       -A     Show supported Asus ACPI extensions (LCD brightness level, video out routing DSDT/acpi4asus info)

       -b     Show battery status information, available batteries only.

       -B, --battery
              Show detailed battery status information, for all battery entries found.

       -c, --cpu
              Show CPU information (type, speed, PM capabilities, throttling states,  c-state  usage,  frequency
              scaling).

       -e     Show just about everything : more info on the batteries, ACPI version, kernel version, CPU, . . .

       -f, --fan
              Show fan status (shows fan info specific to Toshiba or IBM Thinkpad, if applicable).

       -F x   Force  the fan on (x=1) or switch back to auto mode (x=0). Works only on Toshiba laptops.  The fan
              is switched off ONLY if it was forced on first, not if it was switched on automatically.  Requires
              write access to /proc/acpi/toshiba/fan

       -h, --help
              Show help text.

       -j     Eject Thinkpad ultrabay device.  Requires write acces to /proc/acpi/ibm/bay

       -l x   Set  LCD  brightness  level  to  x,  where  x  is in the range 0..7. Works only on Toshiba and IBM
              Thinkpad laptops.  Requires write access to /proc/acpi/tochiba/lcd or /proc/acpi/ibm/brightness
              Illegal values for x will result in the value being set to either 0 or 7.

       -m x   Switch the mail led on (x=1) or off (x=0). Works only on Asus laptops.  Requires write  access  to
              /proc/acpi/asus/mled

       -n x   Switch  the wireless led on (x=1) or off (x=0). Works only on Asus laptops.  Requires write access
              to /proc/acpi/asus/wled

       -o x   Switch the LCD panel on (x=1) or off (x=0). Works only on Asus laptops.  Requires write access  to
              /proc/acpi/asus/lcd

       -s, --suspend to memory
              Put  the  machine  into  sleep  state  S3, if possible.  Requires write access to /proc/acpi/sleep
              (kernel 2.4.x) or /sys/power/state (kernel 2.6.x)

       -S, --suspend to disk ?
              Put the machine into sleep state S4, if  possible.   Requires  write  access  to  /proc/acpi/sleep
              (kernel 2.4.x) or /sys/power/state (kernel 2.6.x)

       -t, --thermal
              Show thermal zone(s) information, including trip_points.

       -T, --Toshiba
              Show  supported  Toshiba  ACPI extensions, currently being LCD brightness level, video out routing
              (what display is the video chip sending to) and fan status (on/off, forced or not).

       -v     Show more verbose output when something is not found. Makes sense only  when  used  together  with
              other options.

       -V, --version
              Show acpitool version number and release date, then exit.

       -w     Show the wakeup capable devices. (Available since ACPI 20040715, check your version).

       -W x   Enable/disable  wakeup  capable  device x. Run 'acpitool -w' to see valid numbers for x.  Requires
              write access to /proc/acpi/wakeup

       -z x   Set Asus LCD brightness level to x, where x is 0..15. Works only on Asus laptops.  Requires  write
              access to /proc/acpi/asus/brn

REMARKS

       This  program  absolutely  requires  a Linux kernel with ACPI support enabled. This program will not work
       without it.

       IBM Thinkpad support is part of the Linux kernel since kernel 2.6.10.

       Don't blame me if acpitool can't suspend your laptop : there  are  quite  some  problematic  laptops  out
       there. Check the acpi-bugzilla list if you don't believe me ;)

       Note  that some options, like -F, -l , -j, -s, -W  and -z, require write access to some of the /proc/acpi
       entries. This requires acpitool either to be run as root or either administrative measures must be taken,
       most likely by root, to allow ordinary users to write to these files. Creating a group for ACPI users and
       setting permissions accordingly comes to mind.

       Also note that older laptops (< 2000) often simply don't have ACPI  support,  they  usually  support  APM
       only.

BUGS

       Let me know if you think you found one.

FILES

       /proc/acpi/...
       /proc/acpi/toshiba
       /proc/acpi/asus
       /proc/acpi/ibm
       /sys/power/state

HOMEPAGE

       http://freeunix.dyndns.org:8000/site2/acpitool.shtml

AUTHOR

       This  program  is written and maintained by David Leemans (davidleemans |at| scarlet |dot| be) and may be
       freely distributed under the terms of the GNU General Public License.  There is  ABSOLUTELY  NO  WARRANTY
       for this program.