If that works, edit /etc/default/grub and add those options to the default options. quiet splash nomodeset acpi_backlight=vendor To the kernel line add nomodeset acpi_backlight=vendor Some hardware may work with different options.Īcer - acpi_backlight=acer_acpi or even acpi_osi=Linux acpi_backlight=legacy.Īs you can see, you may need to google search for your settings. When you boot, at the grub screen, hit e to edit. This function, the backlight control, is dependent on your bios and kernel version.
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