The Bionic 4.15.0-12 kernel is based off of upstream 4.15.7. Can you test that kernel as well? That will tell us if the fix in Bionic is an Ubuntu SAUCE patch or a 4.15 stable update.
http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.15.7/
The Bionic 4.15.0-12 kernel is based off of upstream 4.15.7. Can you test that kernel as well? That will tell us if the fix in Bionic is an Ubuntu SAUCE patch or a 4.15 stable update.
http:// kernel. ubuntu. com/~kernel- ppa/mainline/ v4.15.7/