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Looking into cable modem problems in Ubuntu recently, I came across a few horror stories about Comcast, the American ISP. Technicians who have never heard of Linux and insist they can only install the Internet to a Windows computer, that sort of thing. So it was a surprise to come across this blog post by a guy called Linus.
I guess it all depends on who you are, or possibly what you know.

So I need to provision it (ie letting Comcast know about the new modem MAC address), so I call up Comcast. It being a Sunday afternoon, I was expecting that I'll just have to wait for Monday to get it sorted out. But no, not only is there a friendly tech who is greeting me with neither silly muzak nor waiting, but she's happy to get my all provisioned and up and running with a new cable modem in minutes (ok, so it took more than a couple of minutes, but a lot of it was literally waiting for the new cable box to boot up a few times).

The clue in the image above is the telephone number: just call and ask for the ISP to provision your modem seems to be the answer.