查找用于背光控制的驱动程序

$ ls -ld /sys/class/backlight/intel_backlight
lrwxrwxrwx. 1 root root 0 Jun  3 10:08 /sys/class/backlight/intel_backlight
 -> ../../devices/pci0000:00/0000:00:02.0/drm/card0/card0-eDP-1/intel_backlight

$ ls -l /sys/devices/pci0000:00/0000:00:02.0/driver
lrwxrwxrwx. 1 root root 0 Jun  3 09:08 /sys/devices/pci0000:00/0000:00:02.0/driver
 -> ../../../bus/pci/drivers/i915

$ ls -l /sys/bus/pci/drivers/i915/module
lrwxrwxrwx. 1 root root 0 Jun  4 17:04 /sys/bus/pci/drivers/i915/module 
 -> ../../../../module/i915

不要问我确切的猜测driver：)。我认为您可能应该检查每个级别，从最长的路径开始，然后逐步减少，但这有点乏味。