(In reply to Takashi Iwai from comment #13) > What shows /sys/module/i915/parameters/enable_guc if you don't pass the > value -1? After loading the driver, it'll be set to either 0, 1 or 2. According to https://wiki.archlinux.org/index.php/intel_graphics#Enable_GuC_.2F_HuC_firmware_loading this came with Kernel 4.16.