向下箭头键、管道按钮、Print Screen、Home、End、Insert 按钮在 Ubuntu 12.04.5 LTS 中不起作用。Scroll Lock 键也出现了同样的问题。但我使用以下方法修复了这个问题：
xmodmap -e 'add mod3 = Scroll_Lock'
每次我关闭电脑时，此修复都会重置。每次我使用 xmodmap 开机时，我都必须修复它。
我无法解决其他键（例如向下箭头键、Pipe、Print Screen、Home、End 和 Insert）出现的问题。
这是 xmodmap -pke 的输出
keycode 8 =
keycode 9 = Escape NoSymbol Escape NoSymbol Escape
keycode 10 = 1 exclam 1 exclam 1 exclam
keycode 11 = 2 at 2 at 2 at
keycode 12 = 3 numbersign 3 numbersign 3 numbersign
keycode 13 = 4 dollar 4 dollar 4 dollar
keycode 14 = 5 percent 5 percent 5 percent
keycode 15 = 6 asciicircum 6 asciicircum 6 asciicircum
keycode 16 = 7 ampersand 7 ampersand 7 ampersand
keycode 17 = 8 asterisk 8 asterisk 8 asterisk
keycode 18 = 9 parenleft 9 parenleft 9 parenleft
keycode 19 = 0 parenright 0 parenright 0 parenright
keycode 20 = minus underscore minus underscore minus underscore
keycode 21 = equal plus equal plus equal plus
keycode 22 = BackSpace BackSpace BackSpace BackSpace BackSpace BackSpace
keycode 23 = Tab ISO_Left_Tab Tab ISO_Left_Tab Tab ISO_Left_Tab
keycode 24 = q Q q Q q Q
keycode 25 = w W w W w W
keycode 26 = e E e E e E
keycode 27 = r R r R r R
keycode 28 = t T t T t T
keycode 29 = y Y y Y y Y
keycode 30 = u U u U u U
keycode 31 = i I i I i I
keycode 32 = o O o O o O
keycode 33 = p P p P p P
keycode 34 = bracketleft braceleft bracketleft braceleft bracketleft braceleft
keycode 35 = bracketright braceright bracketright braceright bracketright braceright
keycode 36 = Return NoSymbol Return NoSymbol Return
keycode 37 = Control_L NoSymbol Control_L NoSymbol Control_L
keycode 38 = a A a A a A
keycode 39 = s S s S s S
keycode 40 = d D d D d D
keycode 41 = f F f F f F
keycode 42 = g G g G g G
keycode 43 = h H h H h H
keycode 44 = j J j J j J
keycode 45 = k K k K k K
keycode 46 = l L l L l L
keycode 47 = semicolon colon semicolon colon semicolon colon
keycode 48 = apostrophe quotedbl apostrophe quotedbl apostrophe quotedbl
keycode 49 = grave asciitilde grave asciitilde grave asciitilde
keycode 50 = Shift_L NoSymbol Shift_L NoSymbol Shift_L
keycode 51 = backslash bar backslash bar backslash bar
keycode 52 = z Z z Z z Z
keycode 53 = x X x X x X
keycode 54 = c C c C c C
keycode 55 = v V v V v V
keycode 56 = b B b B b B
keycode 57 = n N n N n N
keycode 58 = m M m M m M
keycode 59 = comma less comma less comma less
keycode 60 = period greater period greater period greater
keycode 61 = slash question slash question slash question
keycode 62 = Shift_R NoSymbol Shift_R NoSymbol Shift_R
keycode 63 = KP_Multiply KP_Multiply KP_Multiply KP_Multiply KP_Multiply KP_Multiply XF86ClearGrab
keycode 64 = Alt_L Meta_L Alt_L Meta_L Alt_L Meta_L
keycode 65 = space NoSymbol space NoSymbol space
keycode 66 = Caps_Lock NoSymbol Caps_Lock NoSymbol Caps_Lock
keycode 67 = F1 F1 F1 F1 F1 F1 XF86Switch_VT_1
keycode 68 = F2 F2 F2 F2 F2 F2 XF86Switch_VT_2
keycode 69 = F3 F3 F3 F3 F3 F3 XF86Switch_VT_3
keycode 70 = F4 F4 F4 F4 F4 F4 XF86Switch_VT_4
keycode 71 = F5 F5 F5 F5 F5 F5 XF86Switch_VT_5
keycode 72 = F6 F6 F6 F6 F6 F6 XF86Switch_VT_6
keycode 73 = F7 F7 F7 F7 F7 F7 XF86Switch_VT_7
keycode 74 = F8 F8 F8 F8 F8 F8 XF86Switch_VT_8
keycode 75 = F9 F9 F9 F9 F9 F9 XF86Switch_VT_9
keycode 76 = F10 F10 F10 F10 F10 F10 XF86Switch_VT_10
keycode 77 = Num_Lock NoSymbol Num_Lock NoSymbol Num_Lock
keycode 78 = Scroll_Lock NoSymbol Scroll_Lock NoSymbol Scroll_Lock
keycode 79 = KP_Home KP_7 KP_Home KP_7 KP_Home KP_7
keycode 80 = KP_Up KP_8 KP_Up KP_8 KP_Up KP_8
keycode 81 = KP_Prior KP_9 KP_Prior KP_9 KP_Prior KP_9
keycode 82 = KP_Subtract KP_Subtract KP_Subtract KP_Subtract KP_Subtract KP_Subtract XF86Prev_VMode
keycode 83 = KP_Left KP_4 KP_Left KP_4 KP_Left KP_4
keycode 84 = KP_Begin KP_5 KP_Begin KP_5 KP_Begin KP_5
keycode 85 = KP_Right KP_6 KP_Right KP_6 KP_Right KP_6
keycode 86 = KP_Add KP_Add KP_Add KP_Add KP_Add KP_Add XF86Next_VMode
keycode 87 = KP_End KP_1 KP_End KP_1 KP_End KP_1
keycode 88 = KP_Down KP_2 KP_Down KP_2 KP_Down KP_2
keycode 89 = KP_Next KP_3 KP_Next KP_3 KP_Next KP_3
keycode 90 = KP_Insert KP_0 KP_Insert KP_0 KP_Insert KP_0
keycode 91 = KP_Delete KP_Decimal KP_Delete KP_Decimal KP_Delete KP_Decimal
keycode 92 = ISO_Level3_Shift NoSymbol ISO_Level3_Shift NoSymbol ISO_Level3_Shift
keycode 93 =
keycode 94 = less greater less greater bar brokenbar bar
keycode 95 = F11 F11 F11 F11 F11 F11 XF86Switch_VT_11
keycode 96 = F12 F12 F12 F12 F12 F12 XF86Switch_VT_12
keycode 97 =
keycode 98 = Katakana NoSymbol Katakana NoSymbol Katakana
keycode 99 = Hiragana NoSymbol Hiragana NoSymbol Hiragana
keycode 100 = Henkan_Mode NoSymbol Henkan_Mode NoSymbol Henkan_Mode
keycode 101 = Hiragana_Katakana NoSymbol Hiragana_Katakana NoSymbol Hiragana_Katakana
keycode 102 = Muhenkan NoSymbol Muhenkan NoSymbol Muhenkan
keycode 103 =
keycode 104 = KP_Enter NoSymbol KP_Enter NoSymbol KP_Enter
keycode 105 = Control_R NoSymbol Control_R NoSymbol Control_R
keycode 106 = KP_Divide KP_Divide KP_Divide KP_Divide KP_Divide KP_Divide XF86Ungrab
keycode 107 = Print Sys_Req Print Sys_Req Print Sys_Req
keycode 108 = Alt_R Meta_R Alt_R Meta_R Alt_R Meta_R
keycode 109 = Linefeed NoSymbol Linefeed NoSymbol Linefeed
keycode 110 = Home NoSymbol Home NoSymbol Home
keycode 111 = Up NoSymbol Up NoSymbol Up
keycode 112 = Prior NoSymbol Prior NoSymbol Prior
keycode 113 = Left NoSymbol Left NoSymbol Left
keycode 114 = Right NoSymbol Right NoSymbol Right
keycode 115 = End NoSymbol End NoSymbol End
keycode 116 = Down NoSymbol Down NoSymbol Down
keycode 117 = Next NoSymbol Next NoSymbol Next
keycode 118 = Insert NoSymbol Insert NoSymbol Insert
keycode 119 = Delete NoSymbol Delete NoSymbol Delete
keycode 120 =
keycode 121 = XF86AudioMute NoSymbol XF86AudioMute NoSymbol XF86AudioMute
keycode 122 = XF86AudioLowerVolume NoSymbol XF86AudioLowerVolume NoSymbol XF86AudioLowerVolume
keycode 123 = XF86AudioRaiseVolume NoSymbol XF86AudioRaiseVolume NoSymbol XF86AudioRaiseVolume
keycode 124 = XF86PowerOff NoSymbol XF86PowerOff NoSymbol XF86PowerOff
keycode 125 = KP_Equal NoSymbol KP_Equal NoSymbol KP_Equal
keycode 126 = plusminus NoSymbol plusminus NoSymbol plusminus
keycode 127 = Pause Break Pause Break Pause Break
keycode 128 = XF86LaunchA NoSymbol XF86LaunchA NoSymbol XF86LaunchA
keycode 129 = KP_Decimal KP_Decimal KP_Decimal KP_Decimal KP_Decimal KP_Decimal
keycode 130 = Hangul NoSymbol Hangul NoSymbol Hangul
keycode 131 = Hangul_Hanja NoSymbol Hangul_Hanja NoSymbol Hangul_Hanja
keycode 132 =
keycode 133 = Super_L NoSymbol Super_L NoSymbol Super_L
keycode 134 = Super_R NoSymbol Super_R NoSymbol Super_R
keycode 135 = Menu NoSymbol Menu NoSymbol Menu
keycode 136 = Cancel NoSymbol Cancel NoSymbol Cancel
keycode 137 = Redo NoSymbol Redo NoSymbol Redo
keycode 138 = SunProps NoSymbol SunProps NoSymbol SunProps
keycode 139 = Undo NoSymbol Undo NoSymbol Undo
keycode 140 = SunFront NoSymbol SunFront NoSymbol SunFront
keycode 141 = XF86Copy NoSymbol XF86Copy NoSymbol XF86Copy
keycode 142 = SunOpen NoSymbol SunOpen NoSymbol SunOpen
keycode 143 = XF86Paste NoSymbol XF86Paste NoSymbol XF86Paste
keycode 144 = Find NoSymbol Find NoSymbol Find
keycode 145 = XF86Cut NoSymbol XF86Cut NoSymbol XF86Cut
keycode 146 = Help NoSymbol Help NoSymbol Help
keycode 147 = XF86MenuKB NoSymbol XF86MenuKB NoSymbol XF86MenuKB
keycode 148 = XF86Calculator NoSymbol XF86Calculator NoSymbol XF86Calculator
keycode 149 =
keycode 150 = XF86Sleep NoSymbol XF86Sleep NoSymbol XF86Sleep
keycode 151 = XF86WakeUp NoSymbol XF86WakeUp NoSymbol XF86WakeUp
keycode 152 = XF86Explorer NoSymbol XF86Explorer NoSymbol XF86Explorer
keycode 153 = XF86Send NoSymbol XF86Send NoSymbol XF86Send
keycode 154 =
keycode 155 = XF86Xfer NoSymbol XF86Xfer NoSymbol XF86Xfer
keycode 156 = XF86Launch1 NoSymbol XF86Launch1 NoSymbol XF86Launch1
keycode 157 = XF86Launch2 NoSymbol XF86Launch2 NoSymbol XF86Launch2
keycode 158 = XF86WWW NoSymbol XF86WWW NoSymbol XF86WWW
keycode 159 = XF86DOS NoSymbol XF86DOS NoSymbol XF86DOS
keycode 160 = XF86ScreenSaver NoSymbol XF86ScreenSaver NoSymbol XF86ScreenSaver
keycode 161 =
keycode 162 = XF86RotateWindows NoSymbol XF86RotateWindows NoSymbol XF86RotateWindows
keycode 163 = XF86Mail NoSymbol XF86Mail NoSymbol XF86Mail
keycode 164 = XF86Favorites NoSymbol XF86Favorites NoSymbol XF86Favorites
keycode 165 = XF86MyComputer NoSymbol XF86MyComputer NoSymbol XF86MyComputer
keycode 166 = XF86Back NoSymbol XF86Back NoSymbol XF86Back
keycode 167 = XF86Forward NoSymbol XF86Forward NoSymbol XF86Forward
keycode 168 =
keycode 169 = XF86Eject NoSymbol XF86Eject NoSymbol XF86Eject
keycode 170 = XF86Eject XF86Eject XF86Eject XF86Eject XF86Eject XF86Eject
keycode 171 = XF86AudioNext NoSymbol XF86AudioNext NoSymbol XF86AudioNext
keycode 172 = XF86AudioPlay XF86AudioPause XF86AudioPlay XF86AudioPause XF86AudioPlay XF86AudioPause
keycode 173 = XF86AudioPrev NoSymbol XF86AudioPrev NoSymbol XF86AudioPrev
keycode 174 = XF86AudioStop XF86Eject XF86AudioStop XF86Eject XF86AudioStop XF86Eject
keycode 175 = XF86AudioRecord NoSymbol XF86AudioRecord NoSymbol XF86AudioRecord
keycode 176 = XF86AudioRewind NoSymbol XF86AudioRewind NoSymbol XF86AudioRewind
keycode 177 = XF86Phone NoSymbol XF86Phone NoSymbol XF86Phone
keycode 178 =
keycode 179 = XF86Tools NoSymbol XF86Tools NoSymbol XF86Tools
keycode 180 = XF86HomePage NoSymbol XF86HomePage NoSymbol XF86HomePage
keycode 181 = XF86Reload NoSymbol XF86Reload NoSymbol XF86Reload
keycode 182 = XF86Close NoSymbol XF86Close NoSymbol XF86Close
keycode 183 =
keycode 184 =
keycode 185 = XF86ScrollUp NoSymbol XF86ScrollUp NoSymbol XF86ScrollUp
keycode 186 = XF86ScrollDown NoSymbol XF86ScrollDown NoSymbol XF86ScrollDown
keycode 187 = parenleft NoSymbol parenleft NoSymbol parenleft
keycode 188 = parenright NoSymbol parenright NoSymbol parenright
keycode 189 = XF86New NoSymbol XF86New NoSymbol XF86New
keycode 190 = Redo NoSymbol Redo NoSymbol Redo
keycode 191 = XF86Tools NoSymbol XF86Tools NoSymbol XF86Tools
keycode 192 = XF86Launch5 NoSymbol XF86Launch5 NoSymbol XF86Launch5
keycode 193 = XF86Launch6 NoSymbol XF86Launch6 NoSymbol XF86Launch6
keycode 194 = XF86Launch7 NoSymbol XF86Launch7 NoSymbol XF86Launch7
keycode 195 = XF86Launch8 NoSymbol XF86Launch8 NoSymbol XF86Launch8
keycode 196 = XF86Launch9 NoSymbol XF86Launch9 NoSymbol XF86Launch9
keycode 197 =
keycode 198 = XF86AudioMicMute NoSymbol XF86AudioMicMute NoSymbol XF86AudioMicMute
keycode 199 = XF86TouchpadToggle NoSymbol XF86TouchpadToggle NoSymbol XF86TouchpadToggle
keycode 200 = XF86TouchpadOn NoSymbol XF86TouchpadOn NoSymbol XF86TouchpadOn
keycode 201 = XF86TouchpadOff NoSymbol XF86TouchpadOff NoSymbol XF86TouchpadOff
keycode 202 =
keycode 203 = Mode_switch NoSymbol Mode_switch NoSymbol Mode_switch
keycode 204 = NoSymbol Alt_L NoSymbol Alt_L NoSymbol Alt_L
keycode 205 = NoSymbol Meta_L NoSymbol Meta_L NoSymbol Meta_L
keycode 206 = NoSymbol Super_L NoSymbol Super_L NoSymbol Super_L
keycode 207 = NoSymbol Hyper_L NoSymbol Hyper_L NoSymbol Hyper_L
keycode 208 = XF86AudioPlay NoSymbol XF86AudioPlay NoSymbol XF86AudioPlay
keycode 209 = XF86AudioPause NoSymbol XF86AudioPause NoSymbol XF86AudioPause
keycode 210 = XF86Launch3 NoSymbol XF86Launch3 NoSymbol XF86Launch3
keycode 211 = XF86Launch4 NoSymbol XF86Launch4 NoSymbol XF86Launch4
keycode 212 = XF86LaunchB NoSymbol XF86LaunchB NoSymbol XF86LaunchB
keycode 213 = XF86Suspend NoSymbol XF86Suspend NoSymbol XF86Suspend
keycode 214 = XF86Close NoSymbol XF86Close NoSymbol XF86Close
keycode 215 = XF86AudioPlay NoSymbol XF86AudioPlay NoSymbol XF86AudioPlay
keycode 216 = XF86AudioForward NoSymbol XF86AudioForward NoSymbol XF86AudioForward
keycode 217 =
keycode 218 = Print NoSymbol Print NoSymbol Print
keycode 219 =
keycode 220 = XF86WebCam NoSymbol XF86WebCam NoSymbol XF86WebCam
keycode 221 =
keycode 222 =
keycode 223 = XF86Mail NoSymbol XF86Mail NoSymbol XF86Mail
keycode 224 = XF86Messenger NoSymbol XF86Messenger NoSymbol XF86Messenger
keycode 225 = XF86Search NoSymbol XF86Search NoSymbol XF86Search
keycode 226 = XF86Go NoSymbol XF86Go NoSymbol XF86Go
keycode 227 = XF86Finance NoSymbol XF86Finance NoSymbol XF86Finance
keycode 228 = XF86Game NoSymbol XF86Game NoSymbol XF86Game
keycode 229 = XF86Shop NoSymbol XF86Shop NoSymbol XF86Shop
keycode 230 =
keycode 231 = Cancel NoSymbol Cancel NoSymbol Cancel
keycode 232 = XF86MonBrightnessDown NoSymbol XF86MonBrightnessDown NoSymbol XF86MonBrightnessDown
keycode 233 = XF86MonBrightnessUp NoSymbol XF86MonBrightnessUp NoSymbol XF86MonBrightnessUp
keycode 234 = XF86AudioMedia NoSymbol XF86AudioMedia NoSymbol XF86AudioMedia
keycode 235 = XF86Display NoSymbol XF86Display NoSymbol XF86Display
keycode 236 = XF86KbdLightOnOff NoSymbol XF86KbdLightOnOff NoSymbol XF86KbdLightOnOff
keycode 237 = XF86KbdBrightnessDown NoSymbol XF86KbdBrightnessDown NoSymbol XF86KbdBrightnessDown
keycode 238 = XF86KbdBrightnessUp NoSymbol XF86KbdBrightnessUp NoSymbol XF86KbdBrightnessUp
keycode 239 = XF86Send NoSymbol XF86Send NoSymbol XF86Send
keycode 240 = XF86Reply NoSymbol XF86Reply NoSymbol XF86Reply
keycode 241 = XF86MailForward NoSymbol XF86MailForward NoSymbol XF86MailForward
keycode 242 = XF86Save NoSymbol XF86Save NoSymbol XF86Save
keycode 243 = XF86Documents NoSymbol XF86Documents NoSymbol XF86Documents
keycode 244 = XF86Battery NoSymbol XF86Battery NoSymbol XF86Battery
keycode 245 = XF86Bluetooth NoSymbol XF86Bluetooth NoSymbol XF86Bluetooth
keycode 246 = XF86WLAN NoSymbol XF86WLAN NoSymbol XF86WLAN
keycode 247 =
keycode 248 =
keycode 249 =
keycode 250 =
keycode 251 =
keycode 252 =
keycode 253 =
keycode 254 =
keycode 255 =
我正在使用 Logitech Internet Pro 键盘，这是一款有线 PS2 型键盘。请告诉我现在该怎么做才能解决这个问题。
答案1
编辑您的~/.Xmodmap
nano ~/.Xmodmap
并添加以下行
add mod3 = Scroll_Lock
保存文件，注销并重新登录。
由于所有其他缺失的键均不会产生输出sudo showkey，因此解决您的问题将会很困难或不可能。