Lines Matching refs:backlight
564 notifications for OSD, use the sysfs backlight class event support.
570 action to change backlight brightness, or the ThinkPads that require
940 sysfs backlight device "thinkpad_screen"
945 It has some limitations: the LCD backlight cannot be actually turned
946 on or off by this interface, it just controls the backlight brightness
949 On IBM (and some of the earlier Lenovo) ThinkPads, the backlight control
952 display backlight brightness control methods have 16 levels, ranging
968 When display backlight brightness controls are available through the
971 backlight brightness control interface if it detects that the standard
974 If you want to use the thinkpad-acpi backlight brightness control
975 instead of the generic ACPI video backlight brightness control for some
994 The interface is implemented through the backlight sysfs class, which is
997 Locate the thinkpad_screen device under /sys/class/backlight, and inside
1016 will dim the display backlight to brightness level 0
1017 because thinkpad-acpi cannot really turn the backlight
1025 Whatever you do, do NOT ever call thinkpad-acpi backlight-level change
1026 interface and the ACPI-based backlight level change interface
1029 and maybe reduce the life of the backlight lamps by needlessly kicking
1475 0x020600: Marker for backlight change event support.