. Não use showkey ou xev - use udev e evtest .
Veja a saída de evtest
# evtest
No device specified, trying to scan all of /dev/input/event*
Available devices:
/dev/input/event0: Logitech Logitech USB Keyboard
/dev/input/event1: Logitech Logitech USB Keyboard
/dev/input/event2: Power Button
/dev/input/event3: Power Button
/dev/input/event4: PC Speaker
/dev/input/event5: A4Tech USB Mouse
/dev/input/event6: ACPI Virtual Keyboard Device
Select the device event number [0-6]: 0
Input driver version is 1.0.1
Input device ID: bus 0x3 vendor 0x46d product 0xc30f version 0x110
Input device name: "Logitech Logitech USB Keyboard"
Supported events:
Event type 0 (EV_SYN)
Event type 1 (EV_KEY)
Event code 1 (KEY_ESC)
Event code 2 (KEY_1)
Event code 3 (KEY_2)
Event code 4 (KEY_3)
Event code 5 (KEY_4)
Event code 6 (KEY_5)
Event code 7 (KEY_6)
Event code 8 (KEY_7)
Event code 9 (KEY_8)
Event code 10 (KEY_9)
Event code 11 (KEY_0)
Event code 12 (KEY_MINUS)
Event code 13 (KEY_EQUAL)
Event code 14 (KEY_BACKSPACE)
Event code 15 (KEY_TAB)
Event code 16 (KEY_Q)
Event code 17 (KEY_W)
Event code 18 (KEY_E)
Event code 19 (KEY_R)
Event code 20 (KEY_T)
Event code 21 (KEY_Y)
Event code 22 (KEY_U)
Event code 23 (KEY_I)
Event code 24 (KEY_O)
Event code 25 (KEY_P)
Event code 26 (KEY_LEFTBRACE)
Event code 27 (KEY_RIGHTBRACE)
Event code 28 (KEY_ENTER)
Event code 29 (KEY_LEFTCTRL)
Event code 30 (KEY_A)
Event code 31 (KEY_S)
Event code 32 (KEY_D)
Event code 33 (KEY_F)
Event code 34 (KEY_G)
Event code 35 (KEY_H)
Event code 36 (KEY_J)
Event code 37 (KEY_K)
Event code 38 (KEY_L)
Event code 39 (KEY_SEMICOLON)
Event code 40 (KEY_APOSTROPHE)
Event code 41 (KEY_GRAVE)
Event code 42 (KEY_LEFTSHIFT)
Event code 43 (KEY_BACKSLASH)
Event code 44 (KEY_Z)
Event code 45 (KEY_X)
Event code 46 (KEY_C)
Event code 47 (KEY_V)
Event code 48 (KEY_B)
Event code 49 (KEY_N)
Event code 50 (KEY_M)
Event code 51 (KEY_COMMA)
Event code 52 (KEY_DOT)
Event code 53 (KEY_SLASH)
Event code 54 (KEY_RIGHTSHIFT)
Event code 55 (KEY_KPASTERISK)
Event code 56 (KEY_LEFTALT)
Event code 57 (KEY_SPACE)
Event code 58 (KEY_CAPSLOCK)
Event code 59 (KEY_F1)
Event code 60 (KEY_F2)
Event code 61 (KEY_F3)
Event code 62 (KEY_F4)
Event code 63 (KEY_F5)
Event code 64 (KEY_F6)
Event code 65 (KEY_F7)
Event code 66 (KEY_F8)
Event code 67 (KEY_F9)
Event code 68 (KEY_F10)
Event code 69 (KEY_NUMLOCK)
Event code 70 (KEY_SCROLLLOCK)
Event code 71 (KEY_KP7)
Event code 72 (KEY_KP8)
Event code 73 (KEY_KP9)
Event code 74 (KEY_KPMINUS)
Event code 75 (KEY_KP4)
Event code 76 (KEY_KP5)
Event code 77 (KEY_KP6)
Event code 78 (KEY_KPPLUS)
Event code 79 (KEY_KP1)
Event code 80 (KEY_KP2)
Event code 81 (KEY_KP3)
Event code 82 (KEY_KP0)
Event code 83 (KEY_KPDOT)
Event code 85 (KEY_ZENKAKUHANKAKU)
Event code 86 (KEY_102ND)
Event code 87 (KEY_F11)
Event code 88 (KEY_F12)
Event code 89 (KEY_RO)
Event code 90 (KEY_KATAKANA)
Event code 91 (KEY_HIRAGANA)
Event code 92 (KEY_HENKAN)
Event code 93 (KEY_KATAKANAHIRAGANA)
Event code 94 (KEY_MUHENKAN)
Event code 95 (KEY_KPJPCOMMA)
Event code 96 (KEY_KPENTER)
Event code 97 (KEY_RIGHTCTRL)
Event code 98 (KEY_KPSLASH)
Event code 99 (KEY_SYSRQ)
Event code 100 (KEY_RIGHTALT)
Event code 102 (KEY_HOME)
Event code 103 (KEY_UP)
Event code 104 (KEY_PAGEUP)
Event code 105 (KEY_LEFT)
Event code 106 (KEY_RIGHT)
Event code 107 (KEY_END)
Event code 108 (KEY_DOWN)
Event code 109 (KEY_PAGEDOWN)
Event code 110 (KEY_INSERT)
Event code 111 (KEY_DELETE)
Event code 113 (KEY_MUTE)
Event code 114 (KEY_VOLUMEDOWN)
Event code 115 (KEY_VOLUMEUP)
Event code 116 (KEY_POWER)
Event code 117 (KEY_KPEQUAL)
Event code 119 (KEY_PAUSE)
Event code 121 (KEY_KPCOMMA)
Event code 122 (KEY_HANGUEL)
Event code 123 (KEY_HANJA)
Event code 124 (KEY_YEN)
Event code 125 (KEY_LEFTMETA)
Event code 126 (KEY_RIGHTMETA)
Event code 127 (KEY_COMPOSE)
Event code 128 (KEY_STOP)
Event code 129 (KEY_AGAIN)
Event code 130 (KEY_PROPS)
Event code 131 (KEY_UNDO)
Event code 132 (KEY_FRONT)
Event code 133 (KEY_COPY)
Event code 134 (KEY_OPEN)
Event code 135 (KEY_PASTE)
Event code 136 (KEY_FIND)
Event code 137 (KEY_CUT)
Event code 138 (KEY_HELP)
Event code 183 (KEY_F13)
Event code 184 (KEY_F14)
Event code 185 (KEY_F15)
Event code 186 (KEY_F16)
Event code 187 (KEY_F17)
Event code 188 (KEY_F18)
Event code 189 (KEY_F19)
Event code 190 (KEY_F20)
Event code 191 (KEY_F21)
Event code 192 (KEY_F22)
Event code 193 (KEY_F23)
Event code 194 (KEY_F24)
Event code 240 (KEY_UNKNOWN)
Event type 4 (EV_MSC)
Event code 4 (MSC_SCAN)
Event type 17 (EV_LED)
Event code 0 (LED_NUML)
Event code 1 (LED_CAPSL)
Event code 2 (LED_SCROLLL)
Event code 3 (LED_COMPOSE)
Event code 4 (LED_KANA)
Properties:
Property type 20 (EV_REP)
Property code 0 (REP_DELAY)
Value 250
Property code 1 (REP_PERIOD)
Value 33
Testing ... (interrupt to exit)
e o segundo dispositivo (o mesmo teclado, mas possui teclas multimídia):
# evtest
No device specified, trying to scan all of /dev/input/event*
Available devices:
/dev/input/event0: Logitech Logitech USB Keyboard
/dev/input/event1: Logitech Logitech USB Keyboard
/dev/input/event2: Power Button
/dev/input/event3: Power Button
/dev/input/event4: PC Speaker
/dev/input/event5: A4Tech USB Mouse
/dev/input/event6: ACPI Virtual Keyboard Device
Select the device event number [0-6]: 1
Input driver version is 1.0.1
Input device ID: bus 0x3 vendor 0x46d product 0xc30f version 0x110
Input device name: "Logitech Logitech USB Keyboard"
Supported events:
Event type 0 (EV_SYN)
Event type 1 (EV_KEY)
Event code 113 (KEY_MUTE)
Event code 114 (KEY_VOLUMEDOWN)
Event code 115 (KEY_VOLUMEUP)
Event code 116 (KEY_POWER)
Event code 131 (KEY_UNDO)
Event code 138 (KEY_HELP)
Event code 140 (KEY_CALC)
Event code 142 (KEY_SLEEP)
Event code 143 (KEY_WAKEUP)
Event code 155 (KEY_MAIL)
Event code 156 (KEY_BOOKMARKS)
Event code 158 (KEY_BACK)
Event code 159 (KEY_FORWARD)
Event code 163 (KEY_NEXTSONG)
Event code 164 (KEY_PLAYPAUSE)
Event code 165 (KEY_PREVIOUSSONG)
Event code 166 (KEY_STOPCD)
Event code 168 (KEY_REWIND)
Event code 171 (KEY_CONFIG)
Event code 172 (KEY_HOMEPAGE)
Event code 182 (KEY_REDO)
Event code 208 (KEY_FASTFORWARD)
Event code 210 (KEY_PRINT)
Event code 217 (KEY_SEARCH)
Event code 234 (KEY_SAVE)
Event code 319 (?)
Event code 328 (BTN_TOOL_QUINTTAP)
Event code 329 (?)
Event code 330 (BTN_TOUCH)
Event code 331 (BTN_STYLUS)
Event code 418 (KEY_ZOOMIN)
Event code 419 (KEY_ZOOMOUT)
Event code 420 (KEY_ZOOMRESET)
Event code 421 (KEY_WORDPROCESSOR)
Event code 423 (KEY_SPREADSHEET)
Event code 425 (KEY_PRESENTATION)
Event code 430 (KEY_MESSENGER)
Event type 4 (EV_MSC)
Event code 4 (MSC_SCAN)
Properties:
Testing ... (interrupt to exit)
Todos os eventos com códigos > 255 não vai funcionar, e você tem que remapear as chaves. Mas primeiro você precisa obter alguns códigos de verificação:
# /lib/udev/keymap -i input/event1
Press ESC to finish, or Control-C if this device is not your primary keyboard
scan code: 0xC022D key code: zoomin
scan code: 0xC022E key code: zoomout
e pressione as teclas que não funcionam. Se você não receber nenhum scancodes aqui, a chave provavelmente está morta, e você não pode fazer nada sobre isso.
Agora você precisa verificar quais códigos de teclas são gratuitos. Para isso, filmar com base no arquivo /usr/include/linux/input.h , digamos:
#define KEY_PROG3 202
#define KEY_PROG4 203
ou você pode pressionar cada tecla no teclado e mapeá-las manualmente.
De qualquer forma, se você souber quais códigos de teclas são gratuitos, pode criar um arquivo com conteúdo semelhante a este:
0xC022D PROG3
0xC022E PROG4
Você pode salvá-lo em /lib/udev/keymaps/logitech-media-keyboard-elite - isso é para o meu teclado.
E agora, você precisa criar uma regra para udev , deve ficar assim:
KERNEL=="event*", ACTION=="add", SUBSYSTEM=="input", SUBSYSTEMS=="usb", ENV{ID_VENDOR_ID}=="046d", ENV{ID_MODEL_ID}=="c30f", RUN+="/lib/udev/keymap $name /lib/udev/keymaps/logitech-media-keyboard-elite"
ENV{ID_VENDOR_ID} , ENV{ID_MODEL_ID} e outros parâmetros que você pode ler:
# udevadm info /dev/input/event0
ou:
# udevadm info --name /dev/input/event0 --attribute-walk
Salve esta regra em /etc/udev/rules.d/95-keymap-media-keyboard-elite.rules e substitua seu teclado. Funciona bem para mim e também para você.