Bug 1030192

Summary: Keyboard backlight turns on after boot or unlock screen
Product: [openSUSE] openSUSE Tumbleweed Reporter: H. Zeng <zhx>
Component: BasesystemAssignee: Forgotten User DV81ZEWZkN <forgotten_DV81ZEWZkN>
Status: RESOLVED FIXED QA Contact: E-mail List <qa-bugs>
Severity: Normal    
Priority: P5 - None CC: tiwai, zhx
Version: Current   
Target Milestone: ---   
Hardware: x86-64   
OS: Other   
Whiteboard:
Found By: --- Services Priority:
Business Priority: Blocker: ---
Marketing QA Status: --- IT Deployment: ---

Description H. Zeng 2017-03-20 23:04:42 UTC 
[Problem]
I have this problem on my Lenovo ThinkPad T470s laptop.

The keyboard backlight can be controlled by `Fn+Space` well. But when it is set to be off, it will turns on after boot, or any time I unlock the screen.

[Attempt solution]
Following a discuss here <https://ubuntu-mate.community/t/keyboard-light-keeps-turning-on-after-login-and-or-unlock/6914/11>, I changed the file

`/etc/dbus-1/system.d/org.freedesktop.UPower.conf`

by changing

`<allow send_destination="org.freedesktop.UPower"
send_interface="org.freedesktop.UPower.KbdBacklight"/>`

To

`<deny send_destination="org.freedesktop.UPower"
send_interface="org.freedesktop.UPower.KbdBacklight"/>`

And then, the backlight won't automatically turn on any more. But another issue comes up: the keyboard backlight won't response to Power Saver Management, and even the options of auto change lightness option in `System Settings` > `Power Management` > `Energy Saving` disappeared.

So this is not the **real** solution.

[Expected result]
Keyboard backlight should not automatically turn on while booting or unlocking screen.
Comment 1 Takashi Iwai 2017-03-21 05:50:20 UTC 
Sounds more like a problem of upower setup.
Feel free to reassign back if it's really a kernel problem.
Comment 2 H. Zeng 2017-03-23 11:46:18 UTC 
This problem seems being fixed with the latest several snapshots of openSUSE Tumbleweed (0317, 0318 or 0320, but I am not sure).