Mainline 5.0rc8 kernel is fine, so it's either something that was broken in mainline between rc1 (when this patch was applied in ubuntu) and rc8, or a general bug in the backporting.
Mainline 5.0rc8 kernel is fine, so it's either something that was broken in mainline between rc1 (when this patch was applied in ubuntu) and rc8, or a general bug in the backporting.