I'm experiencing this in 16.04 LTS as well...
$ uname -a Linux blackhole 4.10.0-19-generic #21~16.04.1-Ubuntu SMP Fri Apr 7 08:20:02 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux
I'm experiencing this in 16.04 LTS as well...
$ uname -a
Linux blackhole 4.10.0-19-generic #21~16.04.1-Ubuntu SMP Fri Apr 7 08:20:02 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux