1 .. SPDX-License-Identifier: GPL-2.0+
2
3
4 LG Gram laptop extra features
5 =============================
6
7 By Matan Ziv-Av <matan@svgalib.org>
8
9
10 Hotkeys
11 -------
12
13 The following FN keys are ignored by the kerne
14
15 - FN-F1 (LG control panel) - Generates F15
16 - FN-F5 (Touchpad toggle) - Generates F21
17 - FN-F6 (Airplane mode) - Generates RFKIL
18 - FN-F9 (Reader mode) - Generates F14
19
20 The rest of the FN keys work without a need fo
21
22
23 Reader mode
24 -----------
25
26 Writing 0/1 to /sys/devices/platform/lg-laptop
27 reader mode. In this mode the screen colors ch
28 and the reader mode indicator LED (on F9 key)
29
30
31 FN Lock
32 -------
33
34 Writing 0/1 to /sys/devices/platform/lg-laptop
35 FN lock.
36
37
38 Battery care limit
39 ------------------
40
41 Writing 80/100 to /sys/class/power_supply/CMB0
42 sets the maximum capacity to charge the batter
43 reduces battery capacity loss over time.
44
45 This value is reset to 100 when the kernel boo
46
47
48 Fan mode
49 --------
50
51 Writing 1/0 to /sys/devices/platform/lg-laptop
52 the fan silent mode.
53
54
55 USB charge
56 ----------
57
58 Writing 0/1 to /sys/devices/platform/lg-laptop
59 charging another device from the USB port whil
60
61 This value is reset to 0 when the kernel boots
62
63
64 LEDs
65 ~~~~
66
67 The are two LED devices supported by the drive
68
69 Keyboard backlight
70 ------------------
71
72 A led device named kbd_led controls the keyboa
73 lighting level: off (0), low (127) and high (2
74
75 The keyboard backlight is also controlled by t
76 which cycles through those levels.
77
78
79 Touchpad indicator LED
80 ----------------------
81
82 On the F5 key. Controlled by led device names
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