[Bug 29842] Radeon runs very hot

[Michel Dänzer]

On Fre, 2011-02-25 at 12:11 -0500, Phillip Susi wrote: 
> 
> It seems like the GPU is executing a few different microcode kernels
> that process commands placed into ring buffers.  When the ring buffers
> are empty and the gui is idle, it seems like the GPU is still busily
> executing an infinite loop checking for work in the ring buffers.

As has been pointed out by Alex, that's not true to the best of our
knowledge.

> Shouldn't the driver detect the idle condition and issue an
> r600_cp_stop() to halt execution and stop wasting power?

Feel free to try it, but I wouldn't expect it to make much if any
difference.


Did you check that your card runs significantly cooler in the other OS
before starting all this ruckus? (Though even if it does, the lack of
clock gating might explain the difference)


-- 
Earthling Michel Dänzer           |                http://www.vmware.com
Libre software enthusiast         |          Debian, X and DRI developer