Ubuntu Phone (Touch) won't turn off automatically after upgrade to OS 23

[giovano iannotti]

After updating my Aquaris 4.5 to OS 23 (Build Ubuntu 15.04 armhf), the screen won't auto lock. It's forever turned on, the phone is heating and the battery, draining.
However, if I manually press the power bottom, the screen turns off and locks. But, if inside my pocket the power bottom is pressed, the screen (locked, this time) will turn on again and won't turn off automatically.

[Ubuntu Foundations Team Bug Bot (crichton)]

Thank you for taking the time to report this bug and helping to make Ubuntu better. It seems that your bug report is not filed about a specific source package though, rather it is just filed against Ubuntu in general. It is important that bug reports be filed about source packages so that people interested in the package can find the bugs about it. You can find some hints about determining what package your bug might be about at https://wiki.ubuntu.com/Bugs/FindRightPackage. You might also ask for help in the #ubuntu-bugs irc channel on Freenode.

To change the source package that this bug is filed about visit https://bugs.launchpad.net/ubuntu/+bug/1466029/+editstatus and add the package name in the text box next to the word Package.

[This is an automated message. I apologize if it reached you inappropriately; please just reply to this message indicating so.]

[giovano iannotti (iannotti)]

I have restored the system, but the same OS version 23 was installed. It didn't downgrade. The problem persists. I suppose this is a version issue?
The battery drains really fast, because if I receive a message, the screen turns on.

[giovano iannotti (iannotti)]

Hello, guys, any help? Any solution ?

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[maarten klop (mjdklop)]

I'm experiencing the same in MX4. Glad I'm not the only one - but that doesn't help either of us. How can we supply information? Which service should keep the screen awake / turn if off after x minutes? Where can I find its logs?