xorg usb /dev/input device not recognized

[drolyk]

Hi all. I have Asus Xonar U7 usb soundcard, it has wheel for volume
up/down and 2 mechanical buttons which are not important for me. Kernel
recognized em as:

dmesg | grep -i xonar
[    2.044929] usb 3-1.4.3: Product: Xonar U7
[    2.055070] input: ASUS Xonar U7 as
/devices/pci0000:00/0000:00:1c.5/0000:06:00.0/usb3/3-1/3-1.4/3-1.4.3/3
-1.4.3:1.4/0003:1043:857C.0006/input/input8
[    2.105724] hid-generic 0003:1043:857C.0006: input,hidraw5: USB HID
v1.00 Device [ASUS Xonar U7] on usb-0000:06:00.0-1.4.3/input4

Imho those imput devices should be catched by xorg and available to
userspace(gnome in my case) for volume settings up, but totally ignored
- tested with xev. Here`s xorg.log

grep -i xonar /var/log/Xorg.0.log
[  2455.124] (II) config/udev: Adding input device ASUS Xonar U7
(/dev/input/event7)
[  2455.124] (**) ASUS Xonar U7: Applying InputClass "evdev keyboard
catchall"
[  2455.124] (**) ASUS Xonar U7: Applying InputClass "libinput keyboard
catchall"
[  2455.124] (**) ASUS Xonar U7: Applying InputClass "system-keyboard"
[  2455.125] (II) Using input driver 'libinput' for 'ASUS Xonar U7'
[  2455.125] (**) ASUS Xonar U7: always reports core events
[  2455.125] (II) input device 'ASUS Xonar U7', /dev/input/event7 is
tagged by udev as: Keyboard
[  2455.125] (II) input device 'ASUS Xonar U7', /dev/input/event7 is a
keyboard
[  2455.125] (II) XINPUT: Adding extended input device "ASUS Xonar U7"
(type: KEYBOARD, id 14)
[  2455.125] (II) input device 'ASUS Xonar U7', /dev/input/event7 is
tagged by udev as: Keyboard
[  2455.125] (II) input device 'ASUS Xonar U7', /dev/input/event7 is a
keyboard

So i wanna ask some help with it, wanna c it working :-) also its
proven to work on laptop with other distro.

Im using fedora22(gnome) with all latest updates. 

Thanks