Errors From xkbcomp are not fatal to the X server

os: debian 7+ xfce4

运行过程X 突然崩了 打印信息如下：

The XKEYBOARD keymap compiler (xkbcomp) reports:
>Warning Type"ONE_LEVEL" has 1 levels,but has 2 symbols
> Ignoring extra symbols
Errors From xkbcomp are not fatal to the X server.

解决方法：
vim /usr/share/X11/xkb/symbols/level3 

xkb_symbols "ralt_switch" {
key {
//type[Group1]="ONE_LEVEL",
type[Group1]="TWO_LEVEL",
symbols[Group1] = [ ISO_Level3_Shift ]
};
modifier_map Mod5 { ISO_Level3_Shift };
};
-------------------------------------------------------------
注销这行
//type[Group1]="ONE_LEVEL",
添加这行
type[Group1]="TWO_LEVEL",



右alt键无法使用

添加一行
xmodmap -e 'keycode 108 = Alt_R'
加在.bashrc的最后一行即可  


参考：