With the help of Jean-Baptiste I was able to get some more information from a device exhibiting the problem.
The logs indicate that the phone is continuously receiving repeat key events (scancode=125=left-meta) from the touchscreen input device. These events are keeping the device awake. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1549701 Title: Sometimes devices don't suspend - display turns back on immediately To manage notifications about this bug go to: https://bugs.launchpad.net/canonical-devices-system-image/+bug/1549701/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs