Problems with "Trust" wireless keyboard

Hello!

I have this wireless keyboard. It has USB receiver. When I power on my computer with receiver plugged in USB port, keyboard doesn't work, not in console nor X-Window. My dmesg output regarding USB and keyboard:

Code:
usbus0: 12Mbps Full Speed USB v1.0
usbus1: 12Mbps Full Speed USB v1.0
usbus2: 12Mbps Full Speed USB v1.0
usbus3: 12Mbps Full Speed USB v1.0
usbus4: 480Mbps High Speed USB v2.0
ugen0.1: <Intel> at usbus0
uhub0: <Intel UHCI root HUB, class 9/0, rev 1.00/1.00, addr 1> on usbus0
ugen1.1: <Intel> at usbus1
uhub1: <Intel UHCI root HUB, class 9/0, rev 1.00/1.00, addr 1> on usbus1
ugen2.1: <Intel> at usbus2
uhub2: <Intel UHCI root HUB, class 9/0, rev 1.00/1.00, addr 1> on usbus2
ugen3.1: <Intel> at usbus3
uhub3: <Intel UHCI root HUB, class 9/0, rev 1.00/1.00, addr 1> on usbus3
ugen4.1: <Intel> at usbus4
uhub4: <Intel EHCI root HUB, class 9/0, rev 2.00/1.00, addr 1> on usbus4
uhub0: 2 ports with 2 removable, self powered
uhub1: 2 ports with 2 removable, self powered
uhub2: 2 ports with 2 removable, self powered
uhub3: 2 ports with 2 removable, self powered

ugen2.2: <MLK> at usbus2
ukbd0: <EP1 Interrupt> on usbus2
kbd2 at ukbd0
ums0: <EP2 Interrupt> on usbus2
ums0: 5 buttons and [XYZT] coordinates ID=1

But when I replug the receiver (plug it out and then plug it back in), keyboard start working. Dmesg output after replugging:
Code:
ugen2.2: <MLK> at usbus2 (disconnected)
ukbd0: at uhub2, port 1, addr 2 (disconnected)
ums0: at uhub2, port 1, addr 2 (disconnected)
ugen2.2: <MLK> at usbus2
ukbd0: <EP1 Interrupt> on usbus2
kbd2 at ukbd0
ums0: <EP2 Interrupt> on usbus2
ums0: 5 buttons and [XYZT] coordinates ID=1

How can I start it without replugging the USB receiver?

Thanks!
 
Thank you for the fast answer.

Unfortunately, switching "USB Legacy support" in BIOS didn't help, and usbconfig also. I tried:
1.
Code:
sudo usbconfig -d 2.2 reset

2.
Code:
sudo usbconfig -d 2.2 power_off
sudo usbconfig -d 2.2 power_on

Also tried kldunload ukbd, ums modules. After unloading they automatically loaded. But it not helped.

Any ideas?
 
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