Asus laptop keyboard light2/25/2023 Sometimes making changes to the grub file can cause startup problems. GRUB_CMDLINE_LINUX_DEFAULT=”quiet splash acpi=noirq acpi_osi=Linux acpi_backlight=vendor” GRUB_CMDLINE_LINUX_DEFAULT="quite splash acpi_osi=Linux acpi_backlight=vendor" GRUB_CMDLINE_LINUX_DEFAULT="quiet splash acpi_osi='!Windows 2012'" GRUB_CMDLINE_LINUX_DEFAULT=”quiet splash acpi_osi=Linux” Then run this command in the Terminal: sudo update-grub. Open the Terminal and type:Ĭhange the line: GRUB_CMDLINE_LINUX_DEFAULT="quiet splash" If the backlight now has full illumination then try adding a command to the grub boot file. Sudo echo 3 > /sys/class/leds/asus\:\:kbd_backlight/brightnessĮcho 3 | sudo tee /sys/class/leds/asus\:\:kbd_backlight/brightness Sudo echo 7 > /sys/devices/platform/samsung/leds/samsung\:\:kbd_backlight/brightnessĮcho 7 | sudo tee /sys/devices/platform/samsung/leds/samsung\:\:kbd_backlight/brightness First check to see if the kernel has control of the backlight by running this command for a Samsung laptop in the Terminal:
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