There's a JJ Cale song by the same name. Since EVERYBODY covers JJ, there's a good chance it's the same song. I haven't heard JJ's version in ages, but Jackson Delta, an acoustic blues trio from Peterborough, Ontario used to do an excellent minor-key version. I've inserted the chords, in square brackets, in the first verse. The chords and melody stay the same throughout; unless specified, assume a minor chord. It sounds amazing with some very simple, loose finger-picking.

The Same Old Blues - by JJ Cale

[A]have you heard that rumour
that's been going around
[D]that you've got a man
way across [A]town
it's the same old [D]story
tell me why does it [A]end
with the [E]same old blues
the [D]same old [Cmaj]blues again[A]

well i wrote you a letter
you must have read it wrong
i stood at your doorway
when you were gone
it's the same old story
tell me why does it end
with the same old blues
the same old blues again

well you gave me the business
and i gave you mine
i got a lot of patience
i got a lot of time
it took a lot of courage
to let the telephone ring
got the same old blues
the same old blues again

i'm gonna climb me a mountain
gonna hi-ide out
i ain't talking to you
and i ain't coming out
it's the same old story
tell me why does it end
with the same old blues
the same old blues again

Hope this is the one you're looking for.

Paul