Comment # 20 on bug 1090122 from Vladimir FROMENT

(In reply to Stefan Dirsch from comment #19)
> (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.
> 
> For this please test without option
> 
>   "i915.enable_guc=1"
> 
> (and all the other options). If needed, i.e. you're using an /etc/modprobe.d
> file snippet, recreate initrd afterwards via
> 
>   mkinitrd

So after disabling all above-mentionned options in Yast > Bootloader and
rebooting, the value of /sys/module/i915/parameters/enable_guc is 0.