[Bug 40762] Kernel crashes when activation powersaving feature of mobility radeon x1400

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https://bugzilla.kernel.org/show_bug.cgi?id=40762

--- Comment #1 from Keivan Moradi <k.moradi@gmail.com> ---
I still have this problem in linux kernel 3.4.55 in ubuntu 12.04.2

- When I activate dynpm kernel craches. 
- In the profile mode also I get the same error as I did before.

I have noticed that the kernel do not changes the GPU and Vram frequencies
correctly in the profile mode. 

This is what I get when I set it to mid:
# echo mid > /sys/class/drm/card0/device/power_profile
# cat /sys/kernel/debug/dri/0/radeon_pm_info

default engine clock: 432000 kHz
current engine clock: 209250 kHz
default memory clock: 396000 kHz
current memory clock: 135000 kHz
PCIE lanes: 1

This is what I get when I set it to low:
# echo low > /sys/class/drm/card0/device/power_profile
# cat /sys/kernel/debug/dri/0/radeon_pm_info
default engine clock: 432000 kHz
current engine clock: 324000 kHz
default memory clock: 396000 kHz
current memory clock: 135000 kHz
PCIE lanes: 1

This is what I get when I set it to high:
# echo high > /sys/class/drm/card0/device/power_profile
# cat /sys/kernel/debug/dri/0/radeon_pm_info
default engine clock: 432000 kHz
current engine clock: 432000 kHz
default memory clock: 396000 kHz
current memory clock: 396000 kHz
PCIE lanes: 0

If you look at the above values, it is obvious that the default clock of mid
and low should be replaced with each other.

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