On my Asus Zenbook the keyboard backlight controls were working fine with the KDE 4.11 betas. However, after upgrading to 4.11 final, upon initial boot my keyboard backlight hotkeys don't work and there are no keyboard control settings in power management. If I log out and then log back in my hot keys work and the keyboard is now present in power management with the necessary slider to control brightness. Anyone else experience anything similar? Thanks.

Unusual. Is your system setup to automatically login on boot, or do you have to provide credentials?
If you have to login manually, does waiting a few moments extra for the system to settle have any effect?

lakerssuperman wrote:On my Asus Zenbook the keyboard backlight controls were working fine with the KDE 4.11 betas. However, after upgrading to 4.11 final, upon initial boot my keyboard backlight hotkeys don't work and there are no keyboard control settings in power management. If I log out and then log back in my hot keys work and the keyboard is now present in power management with the necessary slider to control brightness. Anyone else experience anything similar? Thanks.

Hello all, i'm experiencing exactly the same problem on archlinux + kde 4.11.2 on an ASUS N56VJ. Thanks.

If post-startup you run the following command, does the applet which open allow you to control the brightness of the keyboard controls there?

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plasma-windowed battery

bcooksley wrote:If post-startup you run the following command, does the applet which open allow you to control the brightness of the keyboard controls there?

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plasma-windowed battery

No, the opened applet is exactly the same of than the top panel.

Hmm. Brightness controls must be routed through KDE Power Management, and I suspect the part of the stack which allows for the keyboard backlight controls to change is likely yet to be initialised when KDE begins to startup.

Please run the following, and then try the previously given plasma-windowed command:

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qdbus org.kde.kded /kded unloadModule powerdevil
qdbus org.kde.kded /kded loadModule powerdevil

bcooksley wrote:Hmm. Brightness controls must be routed through KDE Power Management, and I suspect the part of the stack which allows for the keyboard backlight controls to change is likely yet to be initialised when KDE begins to startup.

Please run the following, and then try the previously given plasma-windowed command:

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qdbus org.kde.kded /kded unloadModule powerdevil
qdbus org.kde.kded /kded loadModule powerdevil

Yeah it works ! Thank you. How i can make this permanent at startup ?

I would suggest some form of executable script executed via ~/.kde4/Autostart.
Something like the below should work:

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sleep 10s && qdbus org.kde.kded /kded unloadModule powerdevil && qdbus org.kde.kded /kded loadModule powerdevil &

bcooksley wrote:I would suggest some form of executable script executed via ~/.kde4/Autostart.
Something like the below should work:

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sleep 10s && qdbus org.kde.kded /kded unloadModule powerdevil && qdbus org.kde.kded /kded loadModule powerdevil &

Many thanks, it works ! May i ask a fix for a future kde release ? Or due to my hardware this is impossible ?

I'm not sure how fixable this is - it will depend on if UPower / UDev offers API to detect the appearance of the keyboard backlight controls. If it does, then KDE should definitely be observing those - in which case this is a bug.

However, if no such API is offered, then there is little KDE can do i'm afraid. All you can do is the above workaround - or change how your system starts up to load the keyboard backlight controls earlier, so they are already available when KDE starts up.

In this case, I would suggest filing a feature request at bugs.kde.org, so this can be investigated by the developers.