Enable Game-KeyBoard Rapoo V5 Pro In Ubuntu Trusty

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Problem

A Game KeyBoard Rapoo V5 Pro could work propery under windows, but in Ubuntu 14.04(Trusty) it could not be identified. Following are the steps for enable it.
The dmesg shows following message(similar message):

[ 272.865245] hid-generic 0003:04D9:A04A.0007: input,hidraw4: USB HID v1.10 Keyboard
[xxxxxxxxxxxxxx] on usb-0000:00:1d.0-1/input0
[ 272.874127] hid-generic 0003:04D9:A04A.0008: usage index exceeded
[ 272.874142] hid-generic 0003:04D9:A04A.0008: item 0 2 2 2 parsing failed
[ 272.874187] hid-generic: probe of 0003:04D9:A04A.0008 failed with error -22

Reason

This is an known bug which we could found at:
https://bugs.archlinux.org/task/33322
Or:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1064490

The reason is because “usage index exceeded” because the source code definition in kernel only 12288:

$ cat include/hid.c
....
#define HID_MAX_USAGES			12288

Solution

We need to re-compile the kernel with the modified code, then install it we could get this keyboard working.

Download the kernel source:

$ mkdir ~/Code/Kernel_Enable_Keyboard && ce ~/Code/Kernel_Enable_Keyboard
$ apt-get source linux-image-$(uname -r)

Now prepare the building environment:

$ sudo apt-get install kernel-package
$ sudo apt-get build-dep linux-image-$(uname -r)
$ sudo apt-get install libncurses5 libncurses5-dev

Modify the code:

$ vim linux-lts-utopic-3.16.0/include/hid.h
- #define HID_MAX_USAGES			12288
+ #define HID_MAX_USAGES			42288

Configure the kernel using your current running configuration and build it:

$ sudo make oldconfig
$ sudo make-kpkg -j N --initrd --append-to-version=my-very-own-kernel kernel-image
kernel-headers

You will get the deb file generated under the folder, sudo dpkg -i *.deb them, reboot the system, now insert your USB Keyboard, it will be identified and runs OK.

Known Issue

My 8188eu usb wifi dongle could not be identified, so modprobe r8188eu could solve the problem, Later add it into the system startup script.

$ sudo vim /etc/modules
r8188eu