DisplayLink Forum - Xorg detects DisplayLink adapter as a keyboard

Hi all,
I have encoutered this strange behaviour in Xorg log:

Code:

[   388.980] (II) config/udev: Adding input device Silicon_Motion SMI USB Display (/dev/input/event26)

[   388.980] (**) Silicon_Motion SMI USB Display: Applying InputClass "libinput keyboard catchall"

[   388.980] (**) Silicon_Motion SMI USB Display: Applying InputClass "system-keyboard"

[   388.980] (**) Silicon_Motion SMI USB Display: Applying InputClass "Keyboard Defaults"

[   388.980] (II) Using input driver 'libinput' for 'Silicon_Motion SMI USB Display'

[   388.980] (**) Silicon_Motion SMI USB Display: always reports core events

[   388.980] (**) Option "Device" "/dev/input/event26"

[   388.980] (**) Option "_source" "server/udev"

[   388.983] (II) event26 - Silicon_Motion SMI USB Display: is tagged by udev as: Keyboard

[   388.983] (II) event26 - Silicon_Motion SMI USB Display: device is a keyboard

[   388.984] (II) event26 - Silicon_Motion SMI USB Display: device removed

[   389.112] (**) Option "config_info" "udev:/sys/devices/pci0000:00/0000:00:14.0/usb1/1-4/1-4:1.3/0003:090C:0768.0006/input/input36/event26"

[   389.113] (II) XINPUT: Adding extended input device "Silicon_Motion SMI USB Display" (type: KEYBOARD, id 25)

[   389.113] (**) Option "xkb_layout" "us,cz"

[   389.113] (**) Option "xkb_variant" ",bksl"

[   389.113] (**) Option "xkb_options" "terminate:ctrl_alt_bksp"

[   389.116] (II) event26 - Silicon_Motion SMI USB Display: is tagged by udev as: Keyboard

[   389.116] (II) event26 - Silicon_Motion SMI USB Display: device is a keyboard

This is my dmesg, all looks good there:
dmesg | grep -i display

Code:

[    4.715507] usb 1-4: Product: SMI USB Display

[    4.743110] input: Silicon_Motion SMI USB Display as /devices/pci0000:00/0000:00:14.0/usb1/1-4/1-4:1.3/0003:090C:0768.0001/input/input8

[    4.804609] hid-generic 0003:090C:0768.0001: input,hidraw0: USB HID v1.00 Device [Silicon_Motion SMI USB Display] on usb-0000:00:14.0-4/input3

I am running Arch linux 5.4.80 lts kernel (tried also with new 5.9 kernel). I have installed the drivers along with evdi 1.7. Configured it according to Arch wiki, but the display is still not recognized correctly.

Any ideas where might be the problem?

regards
Maru