Hmm - but sometimes I seem to have the opposite problem: I post that I've had problem X and I've done this, that & the other, then I've asked someone and tried A, B and C, all to no avail. By this time it's a long post and I don't get any replies at all; possibly because I've done everything already, but maybe just because no-one can be bothered to read the whole post.
Or else they obviously don't read the whole post and reply "why don't you try B?" despite the fact that I've already said I've done it, so I end up saying "I've already tried that" anyway.
So I'd say: say everything in the original post only if you can fit it into 2 or 3 short paragraphs.