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What was the last thing you did before you got this message?
Has it always given you this error?
Since I don't use Gentoo, I have to ask, what is on line 254 in the modules file? You can use Vi, pico, or something to edit this file to see what line 254 looks like
Check out my bookmarks below for a quick tutorial on Vi.
If you have pico you can do this at a prompt: