https://bugs.freedesktop.org/show_bug.cgi?id=110897
--- Comment #48 from Richard Thier u9vata@gmail.com --- Btw I saw that mesa codes handle my RC410 as one having RV350 (is_rv350 is true), but unlike R400 family chip. I have no idea if that is right, but if the kernel part do differently than the userland part that is clearly wrong that is sure!
I kind of have a feeling this card is closer to R300 family than R400, but these are the questions that I have problems answering myself :-(
In any ways. I think the wrong rXX_start function is called and r300_start shoud have been called instead in my case originally... Now I am looking where to fix this as it seems like an easy patch after properly finding the issue source.
Actually if this is the case I am only lucky that this manifests itself only in this subtle details because that means a whole minor family different code is running for my card and it takes only luck that it works...