How can I add a custom xkb layout

[Dirk Wallenstein]

On Mon, Jul 05, 2010 at 11:13:29PM +0400, czarkoff at gmail.com wrote:
> Hello!
> 
> I'm using X.Org X Server 1.6.5. I tried to add a custom XKB layout for serbian
> on US keyboard. So, I've added the following to "/etc/X11/xkb/symbols/us":
> 
> // Serbian charecters added as third level symbols to US keyboard layout.
> 
> partial alphanumeric_keys
> xkb_symbols "serbian" {
> 
>   name[Group1]= "USA - Serbian";
> 
>   include "us(basic)"
>   include "level3(ralt_switch)"
> 
>   key <TLDE> { [ grave, asciitilde ] };
>   key <AE06> { [ 6, dead_caron, asciicircum, asciicircum ] };
>   key <AC09> { [ l, L, U1C9, U1C8 ] };
>   key <AB06> { [ n, N, U1CC, U1CB ] };
>   key <AB01> { [ z, Z, U1C6, U1C5 ] };
>   key <AD03> { [ e, E, EuroSign, cent ] };
>   key <AC03> { [ d, D, dstroke, Dstroke ] };
>   key <AC11> { [ dead_acute, quotedbl, apostrophe, U315 ] };
>   key <SPCE> { [ space, space, nobreakspace, nobreakspace ] };
> 
> };
> 
> At the same time I've added following to the "/etc/X11/xkb/rules/xorg.lst":
> 
>   serbian         us: Serbian on US keyboard
> 
> And to the "/etc/X11/xkb/rules/xorg.xml" (to the us layout):
> 
>         <variant>
> 	  <configItem>
> 	    <name>serbian</name>
> 	    <description>US keyboard with Serbian support</description>
>           </configItem>
>         </variant>
> 
> After restarting X I've got:
> 
> % setxkbmap -layout us -variant serbian -v 10
> Setting verbose level to 10
> locale is C
> Warning! Multiple definitions of keyboard layout
>          Using command line, ignoring X server
> Warning! Multiple definitions of layout variant
>          Using command line, ignoring X server
> Applied rules from xorg:
> model:      pc105
> layout:     us
> variant:    serbian
> options:    grp:caps_toggle
> Trying to build keymap using the following components:
> keycodes:   xfree86+aliases(qwerty)
> types:      complete
> compat:     complete+ledcaps(group_lock)
> symbols:    pc/pc(pc105)+pc/us(serbian)+group(caps_toggle)+group(caps_toggle)
> geometry:   pc(pc105)
> Error loading new keyboard description
> 
> I'm sure I've done something wrong, but I can't get what exactly. Anyone
> knows?

I reproduced your steps and it works. 
The translation to the symbols component is flawed. An xkeyboard-config
update could fix that.

-- 
Greetings,
Dirk