About Kernel Documentation Linux Kernel Contact Linux Resources Linux Blog

Documentation / laptops / asus-laptop.txt




Custom Search

Based on kernel version 3.15.4. Page generated on 2014-07-07 09:03 EST.

1	Asus Laptop Extras
2	
3	Version 0.1
4	August 6, 2009
5	
6	Corentin Chary <corentincj@iksaif.net>
7	http://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 input
12	 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	
17	This driver supercedes the old asus_acpi driver.
18	
19	Requirements
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	
25	Status
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	
45	Usage
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 via netlink events. You can check with
59	  "acpi_genl monitor" (part of the acpica project).
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	
68	LEDs
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	
77	Backlight
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	
83	Wireless 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	
90	Display 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	
176	LED 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	
211	Driver 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	
229	Unsupported 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	
240	Patches, 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
Hide Line Numbers
About Kernel Documentation Linux Kernel Contact Linux Resources Linux Blog

Information is copyright its respective author. All material is available from the Linux Kernel Source distributed under a GPL License. This page is provided as a free service by mjmwired.net.