for the Intel IGD, I get:
/sys/devices/pci0000:00/0000:00:02.0/drm/card0/card0-LVDS-1/intel_backlight/brightness /sys/devices/pci0000:00/0000:00:02.0/backlight/acpi_video0/brightness /sys/devices/pci0000:00/0000:00:1d.7/usb1/1-1/leds/rtl8187-phy0::radio/brightness /sys/devices/pci0000:00/0000:00:1d.7/usb1/1-1/leds/rtl8187-phy0::rx/brightness /sys/devices/pci0000:00/0000:00:1d.7/usb1/1-1/leds/rtl8187-phy0::tx/brightness it appears slightly differently, so what does this mean? Am I to edit one such file?
