Upgrading to 18.04 seems has made this bug appear for me. I have tried updating to the latest kernel but that did not help.
$ uname -a
Linux erikkallen-laptop 4.17.0-041700rc4-generic #201805070430 SMP Mon May 7 04:31:46 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux
$ lsb_release -a
No LSB modules are available. Distributor ID: Ubuntu Description: Ubuntu 18.04 LTS Release: 18.04 Codename: bionic
Upgrading to 18.04 seems has made this bug appear for me.
I have tried updating to the latest kernel but that did not help.
$ uname -a
Linux erikkallen-laptop 4.17.0- 041700rc4- generic #201805070430 SMP Mon May 7 04:31:46 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux
$ lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 18.04 LTS
Release: 18.04
Codename: bionic