Opening Kate as sudo from command line

[Earl Violet]

I edited grub using "sudo kate /boot/grub/menu.lst". Kate opened and
I did my edit. I wonder if this is something I did or a problem with
Kubuntu as I get the following output in the terminal:

X Error: BadDevice, invalid or uninitialized input device 166
  Major opcode:  144
  Minor opcode:  3
  Resource id:  0x0
Failed to open device
X Error: BadDevice, invalid or uninitialized input device 166
  Major opcode:  144
  Minor opcode:  3
  Resource id:  0x0
Failed to open device
Link points to "/tmp/ksocket-root"
Xlib: connection to ":0.0" refused by server
Xlib: No protocol specified

kdeinit: Can't connect to the X Server.
kdeinit: Might not terminate at end of session.
Link points to "/tmp/kde-root"
Xlib: connection to ":0.0" refused by server
Xlib: No protocol specified

kded: cannot connect to X server :0.0
DCOP aborting call from 'anonymous-4870' to 'kded'
kded: ERROR: Communication problem with kded, it probably crashed.
ScimInputContextPlugin()
Xlib: connection to ":0.0" refused by server
Xlib: No protocol specified

Xlib: connection to ":0.0" refused by server
Xlib: No protocol specified

Xlib: connection to ":0.0" refused by server
Xlib: No protocol specified

kio_uiserver: cannot connect to X server :0.0
DCOP aborting call from 'kate-4861' to 'kio_uiserver'
ERROR: KUniqueApplication: Registering failed!
ERROR: Communication problem with kio_uiserver, it probably crashed.
QObject::disconnect: Unexpected null parameter
~ScimInputContextPlugin()

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