Take the 2-minute tour ×
Super User is a question and answer site for computer enthusiasts and power users. It's 100% free, no registration required.

When I try to move keys, so that I have CapsLock on escape, Control on CapsLock and Escape on left control, I get the following error:

% xmodmap ~/.Xmodmap
X Error of failed request:  BadValue (integer parameter out of range for operation)
  Major opcode of failed request:  118 (X_SetModifierMapping)
  Value in failed request:  0x17
  Serial number of failed request:  15
  Current serial number in output stream:  15

That is the code that fails:

remove Lock = Caps_Lock

keycode 9 = Caps_Lock
add Lock = Caps_Lock
remove Control = Control_L

! CapsLock
keycode 66 = Control_L
add control = Control_L

! Control_R
keycode 37 = Escape

! 2*Meta_L
keycode 148 = Meta_L
add mod1 = Meta_L

If I comment out all lines that start with either add or remove it runs without any errors, but does not do what I want.

Program versions (Gentoo x86 (stable)):

  • xorg-server-1.7.6
  • xmodmap-1.0.4
  • xf86-input-evdev-2.3.2


# nvidia-xconfig: X configuration file generated by nvidia-xconfig
# nvidia-xconfig:  version 1.0  (buildmeister@builder63)  Fri Aug 14 17:54:58 PDT 2009

Section "ServerLayout"
    Identifier     "Layout0"
    Screen      0  "Screen0"
    InputDevice    "Evdev Keyboard" "CoreKeyboard"
    InputDevice    "Evdev Mouse" "CorePointer"
Section "Module"
    Disable "dri"
    Disable "dri2"

Section "InputDevice"
    Identifier  "Evdev Keyboard"
    Driver      "evdev"
    Option      "Device"     "/dev/input/event2"
    Option      "CoreKeyboard"
    Option      "AutoRepeat" "500 25"
    Option      "XkbRules"   "xorg"
    Option      "XkbModel"   "yahoo"
    Option      "XkbLayout"  "dvp2"
    Option      "XkbOptions"  "grp_led:scroll,grp:rctrl_toggle,compose:rwin,grp:lwin_switch"

Section "InputDevice"
   Identifier    "Evdev Mouse"
   Driver        "evdev"
   Option        "CorePointer"
   Option        "Device"                    "/dev/input/event3"
   Option        "Name"                      "Genius Ergo Mouse"
   Option        "HWHEELRelativeAxisButtons" "7 6"
   Option        "WHEELRelativeAxizButtons"  "4 5"
   Option        "SendCoreEvents"            "true"
   Option        "Buttons"                   "11"

Section "Files"
    FontPath "/usr/share/fonts/misc"
    FontPath "/usr/share/fonts/Type1"
    FontPath "/usr/share/fonts/100dpi"
    FontPath "/usr/share/fonts/75dpi"

    FontPath "/usr/share/fonts/terminus"
    # FontPath "/usr/share/fonts/intlfonts"

    FontPath "/usr/share/fonts/ttf-bitstream-vera"
    # FontPath "/usr/share/fonts/ttf"
    FontPath "/usr/share/fonts/corefonts"

    FontPath "/usr/share/fonts/paratype"

Section "Monitor"
    Identifier     "Monitor0"
    VendorName     "Unknown"
    ModelName      "Unknown"
    HorizSync       28.0 - 33.0
    VertRefresh     43.0 - 72.0
    Option         "DPMS"

Section "Device"
    Identifier     "Device0"
    Driver         "nvidia"
    VendorName     "NVIDIA Corporation"

Section "Screen"
    Identifier     "Screen0"
    Device         "Device0"
    Monitor        "Monitor0"
    DefaultDepth    24
    SubSection     "Display"
        Depth       24

#Section "Extensions"
    #Option "Composite" "Disable"
Section "ServerFlags"
    Option         "AutoAddDevices" "false"
    Option         "DontVTSwitch" "false"
    Option         "DontZap" "false"
    Option         "DontZoom"     "true"

Everything worked before update.

share|improve this question
I can forget about caps lock: I do not use it, and use xkboption ctrl:nocaps to map control on caps lock. But how to map mod1 (alt) to XF86Calculator key (it is near the space bar on my keyboard)? –  ZyX Apr 27 '10 at 15:16
Last issue was solved: to map XF86Calculator to alt modifier I must take existing modifier's character name (it is Alt_L). Still wondering about how to map escape to caps lock, but, as I said, I never use it. –  ZyX Apr 27 '10 at 15:23
I get the same error, also on gentoo. –  Flow May 20 '11 at 5:19

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Browse other questions tagged or ask your own question.