this is what i get

[sud]

when i type sudhanshu@sudhanshu-desktop:~$ sudo kate /etc/apt/sources.list

I get::

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

kded: cannot connect to X server :0.0
kded: ERROR: KUniqueApplication: Registering failed!
kded: ERROR: Communication problem with kded, it probably crashed.
qstring_to_xtp result code -2
ScimInputContextPlugin()
Qt: Locales not supported on X server
QInputContext: no input method context available
QInputContext: no input method context available
kate: WARNING: Can't open /root/share/apps/konqueror/bookmarks.xml
qstring_to_xtp result code -2
qstring_to_xtp result code -2
qstring_to_xtp result code -2
qstring_to_xtp result code -2
qstring_to_xtp result code -2
qstring_to_xtp result code -2
qstring_to_xtp result code -2
QInputContext: no input method context available
QInputContext: no input method context available
qstring_to_xtp result code -2
qstring_to_xtp result code -2
qstring_to_xtp result code -2
qstring_to_xtp result code -2
qstring_to_xtp result code -2
qstring_to_xtp result code -2
qstring_to_xtp result code -2
qstring_to_xtp result code -2
qstring_to_xtp result code -2
qstring_to_xtp result code -2
qstring_to_xtp result code -2
qstring_to_xtp result code -2
WHAT SHOULD I DO?
PLEASE HELP
SUD

[claydoh]

Re: this is what i get

some gui apps don't like sudo, so try using 'kdesu' which is a graphical login prompt for that purpose.

The top half of the error you are getting is more of a warning as Kubuntu has wacom tablet settings as part of our xorg.conf even if we don't have that sort of device, so it is just noticing that. You will see the same using kdesu, but try that and see if that opens the file up for you.