[Bug 543022] [NEW] Sleep button work but after pressing the button laptop not going to sleep

[RussianNeuroMancer]

Public bug reported:

Binary package hint: kubuntu-desktop

My laptop (Lenovo Y550-4CWI) have sleep combination (Fn+F1), this combination recognized by xv, and other application as sleep button, but laptop not react to pressing this combination. Send to sleep through the menu works.
Maybe sleep button is simply not matched action in conf files?
Anyway, I attach dmesg and lspci output.
Any other information is needed?

** Affects: kubuntu-meta (Ubuntu)
     Importance: Undecided
         Status: New

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Sleep button work but after pressing the button laptop not going to sleep
https://bugs.launchpad.net/bugs/543022
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