Was attachment 64759 [details] [review] ever applied to kernel's git? While I don't know if the
current bug is still happening for radeon HD 6450 cards, it was fixing bug
43655  (which was considered as a duplicate, but it was not as explained in the
last comment of that bug because it works for HD 6950).

If not, please let me know because I'm still experiencing bug 43655 with kernel
3.9.0-rc4 and attachment 64759 [details] [review] can't be applied on kernel's current git version
(was applying on 3.7, not sure about 3.8, definitively not on 3.9).