[EN] Backlight control fix on HP Probook 4540 with Debian

sid@prosid ~ $ ls /sys/class/backlight/
acpi_video0 intel_backlight

edit /etc/default/grub and add “video.use_native_backlight=1″ in GRUB_CMDLINE_LINUX_DEFAULT

GRUB_CMDLINE_LINUX_DEFAULT="quiet splash video.use_native_backlight=1"

reboot & check

sid@prosid ~ $ ls /sys/class/backlight/
intel_backlight

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