After some more experimentation with this fix, I noticed a strange behavior on Nexus4. When autobrightness is enabled and the screen turns on under bright light, the updated repowerd autobrightness algorithm transitions the brightness to a high value (as expected), but the N4 display sometimes doesn't react to this high brightness setting, remaining at an arbitrary lower brightness setting instead. It seems that it takes a screen content update to "remind" the Nexus4 display that the brightness has changed.
This problematic behavior is not present on other devices (krillin, arale), and all findings point to some system layer below repowerd as the culprit. This Nexus4 behavior doesn't affect the validity of the proposed fix, since repowerd itself is doing the right thing. I will file a new bug for this Nexus4 specific issue when the fix for this bug lands in the image, so that the problem is easy for others to reproduce. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1613871 Title: Regression: In dark conditions autobrightness does not adapt To manage notifications about this bug go to: https://bugs.launchpad.net/canonical-devices-system-image/+bug/1613871/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
