/sys/devices/pci0000:00/0000:00:01.0/0000:01:00.0/backlight/acpi_video1/brightness
/sys/devices/pci0000:00/0000:00:01.0/0000:01:00.0/backlight/acpi_video1/max_brightness
/sys/devices/pci0000:00/0000:00:01.0/0000:01:00.0/backlight/acpi_video1/actual_brightness
/sys/devices/pci0000:00/0000:00:02.0/drm/card0/card0-LVDS-1/intel_backlight/brightness
/sys/devices/pci0000:00/0000:00:02.0/drm/card0/card0-LVDS-1/intel_backlight/max_brightness
/sys/devices/pci0000:00/0000:00:02.0/drm/card0/card0-LVDS-1/intel_backlight/actual_brightness
/sys/devices/pci0000:00/0000:00:02.0/backlight/acpi_video0/brightness
/sys/devices/pci0000:00/0000:00:02.0/backlight/acpi_video0/max_brightness
/sys/devices/pci0000:00/0000:00:02.0/backlight/acpi_video0/actual_brightness
/sys/devices/pci0000:00/0000:00:1c.0/0000:02:00.0/leds/mmc0::/brightness
/sys/devices/pci0000:00/0000:00:1c.0/0000:02:00.0/leds/mmc0::/max_brightness
/sys/devices/pci0000:00/0000:00:1c.1/0000:03:00.0/leds/phy0-led/brightness
/sys/devices/pci0000:00/0000:00:1c.1/0000:03:00.0/leds/phy0-led/max_brightness
/sys/devices/platform/thinkpad_acpi/leds/tpacpi::thinkvantage/brightness
/sys/devices/platform/thinkpad_acpi/leds/tpacpi::thinkvantage/max_brightness
/sys/devices/platform/thinkpad_acpi/leds/tpacpi::thinklight/brightness
/sys/devices/platform/thinkpad_acpi/leds/tpacpi::thinklight/max_brightness
/sys/devices/platform/thinkpad_acpi/leds/tpacpi::standby/brightness
/sys/devices/platform/thinkpad_acpi/leds/tpacpi::standby/max_brightness
/sys/devices/platform/thinkpad_acpi/leds/tpacpi::power/brightness
/sys/devices/platform/thinkpad_acpi/leds/tpacpi::power/max_brightness
/sys/module/i915/parameters/invert_brightness
/sys/module/video/parameters/brightness_switch_enabled
/sys/module/thinkpad_acpi/parameters/brightness_enable
/sys/module/thinkpad_acpi/parameters/brightness_mode
