Remote login, graphically?

[Andreas Schildbach]

Hello everyone,

I have installed Ubuntu on my mother's machine. Now, I'd like to solve 
some of her technical problem remotely. I can already login via SSH and 
fix things with a text editor.

Now, I'd like to start several X programs on her machine, but have the 
user interface on my machine. I have tunneled X through SSH with:

ssh -X ...

I can start "xeyes", and it appears on my monitor. However, when I start 
"firefox", I get the following error after some time waiting:

$ firefox
The program 'firefox-bin' received an X Window System error.
This probably reflects a bug in the program.
The error was 'BadWindow (invalid Window parameter)'.
   (Details: serial 1057 error_code 3 request_code 20 minor_code 0)
   (Note to programmers: normally, X errors are reported asynchronously;
    that is, you will receive the error a while after causing it.
    To debug your program, run it with the --sync command line
    option to change this behavior. You can then get a meaningful
    backtrace from your debugger if you break on the gdk_x_error() 
function.)

Also, I'd like to start "from scratch" and login to her machine via GDM, 
in a way so I have the complete gnome environment. Is this possible?

And lastly, is this also possible in a way that she can see what I am 
doing, or I can see what she is doing?

Regards,

Andreas