Yes, I did, but I also read the rest of the posts.
As stated before:"That one is about the limit (<128), this one is about negative values (128-255) and how they (do not) work.", so it's not a duplicate.
Please read the entire posts and you'll understand the difference.
Okay, but (again) this one isn't about unsupported amplifiers. It's about the negative ones, wich are sometimes supported, but other times they're not, that's why (the writer of the wiki page and) I call them inconsistent.
That's the problem, they're not reliable, and I think they should be, because the way it is right now makes no sense.