weird bug with ctrl, alt, shift keys going haywire after running vmware on ubuntu

If I use ctrl+alt+enter to full-screen a vm in vmware, then when I return to the host, my special keys - ctrl, alt, and shift - will stop working !

The "xmodmap" command can be used to see the keycodes assigned to the modifiers. When the keys are working fine,

root@vmathew-laptop:~# xmodmap
xmodmap:  up to 3 keys per modifier, (keycodes in parentheses):

shift       Shift_L (0x32),  Shift_R (0x3e)
lock        Caps_Lock (0x42)
control     Control_L (0x25),  Control_R (0x6d)
mod1        Alt_L (0x40),  Alt_R (0x71),  Meta_L (0x9c)
mod2        Num_Lock (0x4d)
mod3    
mod4        Super_L (0x7f),  Hyper_L (0x80)
mod5        Mode_switch (0x5d),  ISO_Level3_Shift (0x7c)

Now, once I run a vm in vmware and use ctrl-alt-enter, to full-screen it, and then come back to the host (ctrl-alt), the output goes.

root@vmathew-laptop:~# xmodmap
xmodmap:  up to 1 keys per modifier, (keycodes in parentheses):

shift    
lock     
control  
mod1     
mod2     
mod3     
mod4     
mod5     

The fix is to use the "setxkbmap" command. This will restore the keycodes for the modifier keys.

[Ref]
http://ubuntuforums.org/showthread.php?t=792737
http://ubuntuforums.org/showthread.php?p=4990785

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