Keyboard backlight turns on by itself

[Josh Arenson]

On my Thinkpad T440s

1. Make sure keyboard backlight is off
2. Wait for the screen to blank due to inactivity
3. Wake the screen and unlock the machine*

Expected behavior: The keyboard backlight is in its original (off) state
Actual behavior: FULL BRIGHTNESS!

* As I haven't been paying close enough attention, I'm not sure at exactly which step in this process the light turns on, but I have correlated it to resuming from screen blanking.

[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.

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[Brian Murray (brian-murray)]

You might look at bug 1510344 to see if it is related at all.

[Josh Arenson (josharenson)]

@Brian, this seems to be the same, but that bug is for Xenial and a fix is already released. I'll test out the patch in lp:1510344 to see if its a regression or not when I have a chance.

[Josh Arenson (josharenson)]

@Brian the unity-settings-daemon in the aforementioned branch doesn't resolve the issue. This seems like a new bug affecting Yakkety.

[Launchpad Janitor (janitor)]

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

[Matias (matiasr-mdq)]

Hello, I´m having the same issue on my Thinkpad t460s.

[Andrew McDaniel (awmcdaniel)]

FTR we also get reports of this happening on trusty with Lenovo X1 Carbon hardware, so it's not just xenial and yakkety