linux/Documentation/laptops/asus-laptop.txt
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   1Asus Laptop Extras
   2
   3Version 0.1
   4August 6, 2009
   5
   6Corentin Chary <corentincj@iksaif.net>
   7http://acpi4asus.sf.net/
   8
   9 This driver provides support for extra features of ACPI-compatible ASUS laptops.
  10 It may also support some MEDION, JVC or VICTOR laptops (such as MEDION 9675 or
  11 VICTOR XP7210 for example). It makes all the extra buttons generate standard
  12 ACPI events that go through /proc/acpi/events and input events (like keyboards).
  13 On some models adds support for changing the display brightness and output,
  14 switching the LCD backlight on and off, and most importantly, allows you to
  15 blink those fancy LEDs intended for reporting mail and wireless status.
  16
  17This driver supercedes the old asus_acpi driver.
  18
  19Requirements
  20------------
  21
  22  Kernel 2.6.X sources, configured for your computer, with ACPI support.
  23  You also need CONFIG_INPUT and CONFIG_ACPI.
  24
  25Status
  26------
  27
  28 The features currently supported are the following (see below for
  29 detailed description):
  30
  31 - Fn key combinations
  32 - Bluetooth enable and disable
  33 - Wlan enable and disable
  34 - GPS enable and disable
  35 - Video output switching
  36 - Ambient Light Sensor on and off
  37 - LED control
  38 - LED Display control
  39 - LCD brightness control
  40 - LCD on and off
  41
  42 A compatibility table by model and feature is maintained on the web
  43 site, http://acpi4asus.sf.net/.
  44
  45Usage
  46-----
  47
  48  Try "modprobe asus-laptop". Check your dmesg (simply type dmesg). You should
  49  see some lines like this :
  50
  51      Asus Laptop Extras version 0.42
  52        L2D model detected.
  53
  54  If it is not the output you have on your laptop, send it (and the laptop's
  55  DSDT) to me.
  56
  57  That's all, now, all the events generated by the hotkeys of your laptop
  58  should be reported in your /proc/acpi/event entry. You can check with
  59  "acpi_listen".
  60
  61  Hotkeys are also reported as input keys (like keyboards) you can check
  62  which key are supported using "xev" under X11.
  63
  64  You can get information on the version of your DSDT table by reading the
  65  /sys/devices/platform/asus-laptop/infos entry. If you have a question or a
  66  bug report to do, please include the output of this entry.
  67
  68LEDs
  69----
  70
  71  You can modify LEDs be echoing values to /sys/class/leds/asus::*/brightness :
  72    echo 1 >  /sys/class/leds/asus::mail/brightness
  73  will switch the mail LED on.
  74  You can also know if they are on/off by reading their content and use
  75  kernel triggers like ide-disk or heartbeat.
  76
  77Backlight
  78---------
  79
  80  You can control lcd backlight power and brightness with
  81  /sys/class/backlight/asus-laptop/. Brightness Values are between 0 and 15.
  82
  83Wireless devices
  84---------------
  85
  86  You can turn the internal Bluetooth adapter on/off with the bluetooth entry
  87  (only on models with Bluetooth). This usually controls the associated LED.
  88  Same for Wlan adapter.
  89
  90Display switching
  91-----------------
  92
  93  Note: the display switching code is currently considered EXPERIMENTAL.
  94
  95  Switching works for the following models:
  96    L3800C
  97    A2500H
  98    L5800C
  99    M5200N
 100    W1000N (albeit with some glitches)
 101    M6700R
 102    A6JC
 103    F3J
 104
 105  Switching doesn't work for the following:
 106    M3700N
 107    L2X00D (locks the laptop under certain conditions)
 108
 109  To switch the displays, echo values from 0 to 15 to
 110  /sys/devices/platform/asus-laptop/display. The significance of those values
 111  is as follows:
 112
 113  +-------+-----+-----+-----+-----+-----+
 114  | Bin   | Val | DVI | TV  | CRT | LCD |
 115  +-------+-----+-----+-----+-----+-----+
 116  + 0000  +   0 +     +     +     +     +
 117  +-------+-----+-----+-----+-----+-----+
 118  + 0001  +   1 +     +     +     +  X  +
 119  +-------+-----+-----+-----+-----+-----+
 120  + 0010  +   2 +     +     +  X  +     +
 121  +-------+-----+-----+-----+-----+-----+
 122  + 0011  +   3 +     +     +  X  +  X  +
 123  +-------+-----+-----+-----+-----+-----+
 124  + 0100  +   4 +     +  X  +     +     +
 125  +-------+-----+-----+-----+-----+-----+
 126  + 0101  +   5 +     +  X  +     + X   +
 127  +-------+-----+-----+-----+-----+-----+
 128  + 0110  +   6 +     +  X  +  X  +     +
 129  +-------+-----+-----+-----+-----+-----+
 130  + 0111  +   7 +     +  X  +  X  +  X  +
 131  +-------+-----+-----+-----+-----+-----+
 132  + 1000  +   8 +  X  +     +     +     +
 133  +-------+-----+-----+-----+-----+-----+
 134  + 1001  +   9 +  X  +     +     +  X  +
 135  +-------+-----+-----+-----+-----+-----+
 136  + 1010  +  10 +  X  +     +  X  +     +
 137  +-------+-----+-----+-----+-----+-----+
 138  + 1011  +  11 +  X  +     +  X  +  X  +
 139  +-------+-----+-----+-----+-----+-----+
 140  + 1100  +  12 +  X  +  X  +     +     +
 141  +-------+-----+-----+-----+-----+-----+
 142  + 1101  +  13 +  X  +  X  +     +  X  +
 143  +-------+-----+-----+-----+-----+-----+
 144  + 1110  +  14 +  X  +  X  +  X  +     +
 145  +-------+-----+-----+-----+-----+-----+
 146  + 1111  +  15 +  X  +  X  +  X  +  X  +
 147  +-------+-----+-----+-----+-----+-----+
 148
 149  In most cases, the appropriate displays must be plugged in for the above
 150  combinations to work. TV-Out may need to be initialized at boot time.
 151
 152  Debugging:
 153  1) Check whether the Fn+F8 key:
 154     a) does not lock the laptop (try a boot with noapic / nolapic if it does)
 155     b) generates events (0x6n, where n is the value corresponding to the
 156        configuration above)
 157     c) actually works
 158     Record the disp value at every configuration.
 159  2) Echo values from 0 to 15 to /sys/devices/platform/asus-laptop/display.
 160     Record its value, note any change. If nothing changes, try a broader range,
 161     up to 65535.
 162  3) Send ANY output (both positive and negative reports are needed, unless your
 163     machine is already listed above) to the acpi4asus-user mailing list.
 164
 165  Note: on some machines (e.g. L3C), after the module has been loaded, only 0x6n
 166  events are generated and no actual switching occurs. In such a case, a line
 167  like:
 168
 169    echo $((10#$arg-60)) > /sys/devices/platform/asus-laptop/display
 170
 171  will usually do the trick ($arg is the 0000006n-like event passed to acpid).
 172
 173  Note: there is currently no reliable way to read display status on xxN
 174  (Centrino) models.
 175
 176LED display
 177-----------
 178
 179  Some models like the W1N have a LED display that can be used to display
 180  several items of information.
 181
 182  LED display works for the following models:
 183    W1000N
 184    W1J
 185
 186  To control the LED display, use the following :
 187
 188    echo 0x0T000DDD > /sys/devices/platform/asus-laptop/
 189
 190  where T control the 3 letters display, and DDD the 3 digits display,
 191  according to the tables below.
 192
 193         DDD (digits)
 194         000 to 999 = display digits
 195         AAA        = ---
 196         BBB to FFF = turn-off
 197
 198         T  (type)
 199         0 = off
 200         1 = dvd
 201         2 = vcd
 202         3 = mp3
 203         4 = cd
 204         5 = tv
 205         6 = cpu
 206         7 = vol
 207
 208  For example "echo 0x01000001 >/sys/devices/platform/asus-laptop/ledd"
 209  would display "DVD001".
 210
 211Driver options:
 212---------------
 213
 214 Options can be passed to the asus-laptop driver using the standard
 215 module argument syntax (<param>=<value> when passing the option to the
 216 module or asus-laptop.<param>=<value> on the kernel boot line when
 217 asus-laptop is statically linked into the kernel).
 218
 219             wapf: WAPF defines the behavior of the Fn+Fx wlan key
 220                   The significance of values is yet to be found, but
 221                   most of the time:
 222                   - 0x0 should do nothing
 223                   - 0x1 should allow to control the device with Fn+Fx key.
 224                   - 0x4 should send an ACPI event (0x88) while pressing the Fn+Fx key
 225                   - 0x5 like 0x1 or 0x4
 226
 227 The default value is 0x1.
 228
 229Unsupported models
 230------------------
 231
 232 These models will never be supported by this module, as they use a completely
 233 different mechanism to handle LEDs and extra stuff (meaning we have no clue
 234 how it works):
 235
 236 - ASUS A1300 (A1B), A1370D
 237 - ASUS L7300G
 238 - ASUS L8400
 239
 240Patches, Errors, Questions:
 241--------------------------
 242
 243 I appreciate any success or failure
 244 reports, especially if they add to or correct the compatibility table.
 245 Please include the following information in your report:
 246
 247 - Asus model name
 248 - a copy of your ACPI tables, using the "acpidump" utility
 249 - a copy of /sys/devices/platform/asus-laptop/infos
 250 - which driver features work and which don't
 251 - the observed behavior of non-working features
 252
 253 Any other comments or patches are also more than welcome.
 254
 255 acpi4asus-user@lists.sourceforge.net
 256 http://sourceforge.net/projects/acpi4asus
 257
 258
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