1 What: /sys/class/backlight/<backligh
2 Date: April 2005
3 KernelVersion: 2.6.12
4 Contact: Richard Purdie <rpurdie@rpsys.n
5 Description:
6 Control BACKLIGHT power, value
7 FB_BLANK_* from fb.h
8
9 - 0 (FB_BLANK_UNBLANK) : po
10 - 4 (FB_BLANK_POWERDOWN) : po
11 Users: HAL
12
13 What: /sys/class/backlight/<backligh
14 Date: April 2005
15 KernelVersion: 2.6.12
16 Contact: Richard Purdie <rpurdie@rpsys.n
17 Description:
18 Control the brightness for thi
19 are between 0 and max_brightne
20 show the brightness level stor
21 may not be the actual brightne
22 Users: HAL
23
24 What: /sys/class/backlight/<backligh
25 Date: March 2006
26 KernelVersion: 2.6.17
27 Contact: Richard Purdie <rpurdie@rpsys.n
28 Description:
29 Show the actual brightness by
30 Users: HAL
31
32 What: /sys/class/backlight/<backligh
33 Date: April 2005
34 KernelVersion: 2.6.12
35 Contact: Richard Purdie <rpurdie@rpsys.n
36 Description:
37 Maximum brightness for <backli
38 Users: HAL
39
40 What: /sys/class/backlight/<backligh
41 Date: September 2010
42 KernelVersion: 2.6.37
43 Contact: Matthew Garrett <mjg@redhat.com
44 Description:
45 The type of interface controll
46 "firmware": The driver uses a
47 "platform": The driver uses a
48 "raw": The driver controls har
49
50 In the general case, when mult
51 interfaces are available for a
52 control should be preferred to
53 be preferred to raw control. U
54 interface reduces the probabil
55 the hardware and the OS indepe
56 backlight state. Platform inte
57 holdover from pre-standardisat
58 interfaces.
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