https://bugzilla.kernel.org/show_bug.cgi?id=37112

--- Comment #9 from Hrvoje Senjan hrvoje.senjan@gmail.com 2012-06-05 06:33:47 --- (In reply to comment #6)

(In reply to comment #5)

...

My first guess is , that kernel changes memory clock too low - with fglrx lowest memory clock is at 400MHz , but with radeon module/low frequency it changes it to 300MHz.

Please, edit drivers/gpu/drm/radeon/radeon_pm.c, find:

...

if (rdev->asic->set_memory_clock && (mclk != rdev->pm.current_mclk)) {

and make it

...

if (0) {

Does it help?

@Rafał Any progress on this bug? It's a reall pain to recompile kerenels without powersaving :(