Curious errors executing my .cshrc which contains an xmodmap command

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  • #20352
    AvatarMickM
    Participant

    I have a .cshrc file that contains this line:

    xmodmap ~/.Xmodmap

    When I connect via NX the terminal window that pops up shows an error and the xmodmap command didn’t work:

    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:  22

    Current serial number in output stream:  22

     

    If I now manually enter the xmodmap command into the terminal window it works just fine without error. Similarly, if I remove the xmodmap line from the .cshrc then when I connect via NX the terminal window shows no errors, and when I then type in the xmodmap command it works just fine without errors and all of the keyboard remappings it defines also work just fine.

    I don’t know what’s going on here – any ideas?

    Other useful information:

    I’m running Mac OS X 10.12.6 and NoMachine version 6.3.6 running a custom session in floating window mode

    My xmodmap file contents is:

    ! This is my ~/.Xmodmap file for the Apple BlueTooth extended keyboard

    ! It brings several unresponsive numeric pad keys to life

    ! You can try any line interactively e.g.:

    ! xmodmap -e “keycode 114 = F16”

    ! You can execute this file by typing:

    ! xmodmap ~/.Xmodmap

    ! xmodmap is case sensitive so enter keysyms correctly!

    ! I use these key names for Cadence hotkeys in .cdsinit

    ! Use xev to determine a key’s keycode

     

    !***********************************************************

    ! Enable the missing numeric pad keys

    !***********************************************************

    ! keycode # = Keysym

    keycode 114 = F16

    keycode 72 = F17

    keycode 87 = F18

    keycode 88 = F19

    ! This is the “clear” key on the numeric pad

    keycode 79 = KP_Separator

     

    !***********************************************************

    ! Swap Control and Command modifiers

    ! Possible issues because the X11 menubar contains ⌘C, ⌘W etc.

    !***********************************************************

    ! via https://www.emacswiki.org/emacs/MetaKeyProblems

    ! To determine your current modifier keys – enter the command “xmodmap”

    ! This is what resulted when I did that:

    ! shift       Shift_L (0x40),  Shift_R (0x44)

    ! lock        Caps_Lock (0x41)

    ! control     Control_L (0x43),  Control_R (0x46)

    ! mod1        Alt_L (0x42),  Alt_R (0x45)

    ! mod2        Meta_L (0x3f),  Meta_R (0x47)

    ! mod3

    ! mod4

    ! mod5

     

    ! So the Option keys are mod1, and the Command keys are mod2

    ! undo any mod2 (i.e. COMMAND) keys already set

    clear mod2

    ! undo any control keys already set

    clear control

    ! Set the COMMAND keys (keycodes 63 & 71) to function as *control* keys

    keycode 63=Control_L

    keycode 71=Control_R

    ! Set the CONTROL keys (keycodes 67 & 70) to function as *command* keys

    keycode 67=Meta_L

    keycode 70=Meta_R

    ! Define Meta_L & Meta_R to function as the mod2 modifier

    add mod2 = Meta_L Meta_R

    ! Define Control_L & Control_R to function as the Control modifier

    add control = Control_L Control_R

     

     

    ! Apple Extended BlueTooth keyboard

    ! 65=Caps_Lock, 56=Tab

    ! The “fn” and Eject keys do nothing at all in xev

     

    !_______________________________________  ________________________________________

    !   control  !   option   !   command  !  !   command  !   option   !   control  !

    !  Control_L !    Alt_L   !    Meta_L  !  !    Meta_R  !    Alt_R   !  Control_R !

    ! keycode 67 ! keycode 66 ! keycode 63 !  ! keycode 71 ! keycode 69 ! keycode 70 !

    !____________!____________!____________!  !____________!____________!____________!

     

    !_____________________________________________

    !      F13     !      F14     !      F15     !

    !      F13     !      F14     !      F15     !

    !  keycode 113 !  keycode 115 !  keycode 121 !

    !______________!______________!______________!

    !      fn      !     home     !   page up    !

    !      nil     !     Home     !    Prior     !

    !      nil     !  keycode 123 !  keycode 124 !

    !______________!______________!______________!

    !    delete    !      end     !   page down  !

    !    Delete    !      End     !     Next     !

    !  keycode 125 !  keycode 127 !  keycode 129 !

    !______________!______________!______________!

    !              ________________

    !              !      up      !

    !              !      UP      !

    !              !  keycode 134 !

    !______________!______________!_______________

    !     left     !     down     !    right     !

    !     Left     !     Down     !    Right     !

    !  keycode 131 !  keycode 133 !  keycode 132 !

    !______________!______________!______________!

     

    !____________________________________________________________

    !      F16     !      F17     !      F18     !      F19     !

    !      F16     !      F17     !      F18     !      F19     !

    !  keycode 114 !  keycode 72  !  keycode 87  !  keycode 88  !

    !______________!______________!______________!______________!

    !    clear     !       =      !       /      !       *      !

    ! KP_Separator !   KP_Equal   !  KP_Divide   ! KP_Multiply  !

    !  keycode 79  !  keycode 89  !  keycode 83  !  keycode 75  !

    !______________!______________!______________!______________!

    !       7      !       8      !       9      !       –      !

    !     KP_7     !     KP_8     !     KP_9     !  KP_Subtract !

    !  keycode 97  !  keycode 99  !  keycode 100 !  keycode 86  !

    !______________!______________!______________!______________!

    !       4      !       5      !       6      !       +      !

    !     KP_4     !     KP_5     !     KP_6     !    KP_Add    !

    !  keycode 94  !  keycode 95  !  keycode 96  !  keycode 77  !

    !______________!______________!______________!______________!

    !       1      !       2      !       3      !              !

    !     KP_1     !     KP_2     !     KP_3     !              !

    !  keycode 91  !  keycode 92  !  keycode 93  !     Enter    !

    !______________!______________!______________!   KP_Enter   !

    !              0              !       .      !  keycode 84  !

    !            KP_0             !  KP_Decimal  !              !

    !         keycode 90          !  keycode 73  !              !

    !_____________________________!______________!______________!

     

    #20415
    Avatargraywolf
    Moderator

    Hello.

    Likely the xmodmap command is launched before the keybord setup is completed in the remote session. Some key is already defined as modifier (e.g. Meta_L could be in use as Mod1) so the “add” expression fails.

    You could take in account and change the script accordingly, but I think it’d be better if .cshrc is modified to avoid launching xmodmap in the case of remote NoMachine session, i.e.

    if ( ! $?NX_SESSION_ID ) xmodmap ~/.Xmodmap

    In the remote NoMachine session you can instruct NoMachine to run a custom script: use UserScriptAfterSessionStart and UserScriptAfterSessionReconnect in node.cfg.

    Here you find some examples to create a custom script: Some examples to use custom scripts triggered on server and node events

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