While I cannot yet reproduce it I have a germ of a theory. From the logs I see that both Peter and Mathew have autobrightness enabled. I also see that the powerd logic is explicitly setting the brightness to zero seemingly independent of the proximity reading. So perhaps we have a race between proximity, screen on and off, and autobrightness which is confusing powerd into a bad state.
@peter please try turning Adjust brightness automatically to off in the battery indicator and see if you still get the issue. Mathew's log Dec 7 09:41:58 ubuntu-phablet powerd[720]: set brightness 55 Dec 7 09:41:58 ubuntu-phablet powerd[720]: light_dev: setting brightness to 55 Dec 7 09:42:00 ubuntu-phablet powerd[720]: light_dev: setting brightness to 15 Dec 7 09:42:03 ubuntu-phablet powerd[720]: light_dev: setting brightness to 0 Peter's log Mar 8 23:44:58 ubuntu-phablet powerd[757]: set brightness 12 Mar 8 23:44:58 ubuntu-phablet powerd[757]: light_dev: setting brightness to 12 Mar 8 23:44:58 ubuntu-phablet powerd[757]: turn_display_on(0) Mar 8 23:44:58 ubuntu-phablet powerd[757]: light_dev: setting brightness to 0 Mar 8 23:44:59 ubuntu-phablet powerd[757]: light_dev: setting brightness to 12 Mar 8 23:45:00 ubuntu-phablet powerd[757]: we get signal from :1.40: DisplayPowerStateChange Mar 8 23:45:00 ubuntu-phablet powerd[757]: Received DisplayPowerStateChange: state=1 flags=2 Mar 8 23:45:00 ubuntu-phablet powerd[757]: set brightness 12 Mar 8 23:45:01 ubuntu-phablet powerd[757]: light_dev: setting brightness to 0 Mar 8 23:45:02 ubuntu-phablet powerd[757]: turn_display_on(0) Mar 8 23:45:02 ubuntu-phablet powerd[757]: turn_display_on(0) Mar 8 23:45:02 ubuntu-phablet powerd[757]: light_dev: setting brightness to 0 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1493574 Title: [vegeta] Phone app makes screen stay black during call (so you can't hang up) To manage notifications about this bug go to: https://bugs.launchpad.net/canonical-devices-system-image/+bug/1493574/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
