What is the progress of this issue?

I have this bug for a long time since I set DPM on for my HD3650(RV635 chip).
My current kernel is 3.13.0-48-generic from Ubuntu.

Few days ago I set this two kernel parameters: radeon.hard_reset=1
radeon.lockup_timeout=20000, but I'm not sure that it helps.

I think that workoround with setting high performance level is not a solution,
because it same as turning off DPM at all. People say that this workaround
doesn't make GPU too hotter, but I think it's not true for every graphic card.
HD3650 with performance profile (before DPM was developed I used profiles) make
it very hot, cooler buzz loudly trying to decrease GPU temperature.