Bug ID: 102130
           Summary: pp_dpm_mclk always on level 1 (cant set to level 0) rx
           Product: DRI
           Version: unspecified
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: DRM/AMDgpu

I can't set memory state to 0 (300 MHz), it always stays at state 1 (2000 MHz).
If I set 

echo "manual" > power_dpm_force_performance_level
echo 0 > pp_dpm_mclk

the memory clock stays at level 1, and I get kernel message:

[  239.231304] amdgpu: [powerplay] 
                failed to send message 146 ret is 255 
[  239.995386] amdgpu: [powerplay] 
                failed to send pre message 201 ret is 255 

The hardware is "SAPPHIRE NITRO+ Radeon RX 480 OC" and it might be BIOS
related, since some rx 480 users does not have such problem.

Using Ubuntu 16.04.2 kernel 4.13-rc4.

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