(Oops)
im going on what i heard on other responses in different forums
on linuxquestions.org:
well, you have to provide correct refresh rates for your monitor.
your xorg is not correctly configured. best you can do is to try to
connect in a root console. I don't know about how to do that
in ubuntu, but if someone can tell you here, do that, than when
you are root (superuser) type 'xorgconfig', hit the enter key
and answer the questions you'll see on screen.
have your monitor specs ready and when prompted, enter them.
hopefully at reboot you will avoid this annoying message.
and on ubuntuforums.org:
You need to edit the "Monitor" section of your xorg.conf file.
Make sure that the HorizSync and VertRefresh values are correct.
At the command line enter this to edit the file by hand:
Code:
$ sudo nano -w /etc/X11/xorg.conf
the latter comes up with as an unrecognized file command. and im not sure what to do.