Dell XPS 15 9570 and same error.
$ uname -a Linux sinan-XPS-15-9570 4.15.0-43-generic #46-Ubuntu SMP Thu Dec 6 14:45:28 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux
Dell XPS 15 9570 and same error.
$ uname -a
Linux sinan-XPS-15-9570 4.15.0-43-generic #46-Ubuntu SMP Thu Dec 6 14:45:28 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux