i915.enable_dpcd_backlight=0 Boot parameter. In the file /etc/default/grub add that previous code into the quotation marks after GRUB_CMDLINE_LINUX_DEFAULT=“” Verify to grub file: Update to grub:
i915.enable_dpcd_backlight=0 Boot parameter. In the file /etc/default/grub add that previous code into the quotation marks after GRUB_CMDLINE_LINUX_DEFAULT=“” Verify to grub file: Update to grub: