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Destroyed Linux udev keys Bitch (rest)

sekeroz
2021-09-25 23:11:38 +03:00
parent c3c651bddc
commit ae9cb16a4d
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Linux-udev-keys-Bitch.rest

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As root, install program `evtest`
sudo apt-get install evtest
Run it
sudo evtest
Find the smart pointer entry, for example
/dev/input/event6: Gaon-Int Wireless Presenter
Give the device event number (here 6).
Or interrupt and restart `evtest` giving the device path
sudo evtest /dev/input/event6
First, read the line `Input device ID:`
Input device ID: bus 0x3 vendor 0xef5 product 0x3014 version 0x100
Memorize bus, vendor and product values using 4 capitalized digits without 0x: `0003` `0EF5` `3014`. They will be used later.
Now click on device buttons and read scancode after `(MSC_SCAN), value`
Event: time 1455575367.579903, type 4 (EV_MSC), code 4 (MSC_SCAN), value 7004b
The scancode is here `7004b`.
As root, create a file `/etc/udev/hwdb.d/61-smart-pointer.hwdb` and put in it something similar to
### Smart pointer UP4-SP-800 (aka Satechi SP600) binding example ###
evdev:input:b0003v0EF5p3014*
KEYBOARD_KEY_7004b=pageup # key marked PAGE UP -> previous
KEYBOARD_KEY_70005=left # key marked PAUSE -> left
KEYBOARD_KEY_70029=right # key marked START #1 -> right
KEYBOARD_KEY_7003e=right # key marked START #2 -> right
KEYBOARD_KEY_7004e=pagedown # key marked PAGE DOWN -> next
KEYBOARD_KEY_70052=b # key marked PREV -> toggle blank mode
KEYBOARD_KEY_70051=esc # key marked NEXT -> toggle overview mode
KEYBOARD_KEY_700e2=unknown # key marked ALT-TAB #1 -> nothing
KEYBOARD_KEY_7002b=f11 # key marked ALT-TAB #2 -> full screen
The formula `b0003v0EF5p3014*` is constructed by chaining character `b`, bus value `0003`, character `v`, vendor value `0EF5`, character `p`, product value `3014`, a star `*`. Very important, hex numbers should be have **4 capitalized digits**.
To assign the value `pageup` to the top key which emits scancode 0x7004b, write
KEYBOARD_KEY_7004b=pageup
The word `pageup` on the right of `=` sign comes from https://hal.freedesktop.org/quirk/quirk-keymap-list.txt.
For UP4-SP-800 smart pointer (aka Satechi SP600), the keys START and ALT-TAB are special. START generates alternatively scancodes
`0x70029` and `0x7003e`. ALT-TAB generates scancode `0x700e2` followed by scancode `0x7002b`. Here `f11` is used as full screen command on Chrome, Firefox, etc.
To take into account the content of the file, call
sudo udevadm hwdb --update
sudo udevadm trigger
Tested on Ubuntu 15.10.