On opensuse tumbleweed with kernel 5.10.1, the idle power consumption of my AMD graphic card (5700xt navi 10) increased from 8W to 29W over previous kernel versions. This is annoying as the graphic card periodically starts and stops the fan to deal with the increased temperature while simply displaying the desktop.

I only have one monitor attached (1920x1200@60Hz) but the VRAM clock is now set to 850MHz all the time, while it was as 100MHz with earlier kernels. Is there any way to revert to the old behaviour?

With 5.10.1-1-default: cat /sys/kernel/debug/dri/0/amdgpu_pm_info
GFX Clocks and Power:
        875 MHz (MCLK)
        800 MHz (SCLK)
        1300 MHz (PSTATE_SCLK)
        625 MHz (PSTATE_MCLK)
        725 mV (VDDGFX)
        29.0 W (average GPU)

GPU Temperature: 52 C
GPU Load: 0 %
MEM Load: 0 %

SMC Feature Mask: 0x00000623a3ddaffb
VCN: Disabled

Clock Gating Flags Mask: 0x38099f05
        Graphics Medium Grain Clock Gating: On
        Graphics Medium Grain memory Light Sleep: Off
        Graphics Coarse Grain Clock Gating: On
        Graphics Coarse Grain memory Light Sleep: Off
        Graphics Coarse Grain Tree Shader Clock Gating: Off
        Graphics Coarse Grain Tree Shader Light Sleep: Off
        Graphics Command Processor Light Sleep: Off
        Graphics Run List Controller Light Sleep: Off
        Graphics 3D Coarse Grain Clock Gating: Off
        Graphics 3D Coarse Grain memory Light Sleep: Off
        Memory Controller Light Sleep: On
        Memory Controller Medium Grain Clock Gating: On
        System Direct Memory Access Light Sleep: On
        System Direct Memory Access Medium Grain Clock Gating: On
        Bus Interface Medium Grain Clock Gating: On
        Bus Interface Light Sleep: On
        Unified Video Decoder Medium Grain Clock Gating: Off
        Video Compression Engine Medium Grain Clock Gating: Off
        Host Data Path Light Sleep: On
        Host Data Path Medium Grain Clock Gating: On
        Digital Right Management Medium Grain Clock Gating: Off
        Digital Right Management Light Sleep: Off
        Rom Medium Grain Clock Gating: Off
        Data Fabric Medium Grain Clock Gating: Off
        Address Translation Hub Medium Grain Clock Gating: On
        Address Translation Hub Light Sleep: On


With 5.9.14-1-default: cat /sys/kernel/debug/dri/0/amdgpu_pm_info
Clock Gating Flags Mask: 0x38099f05
        Graphics Medium Grain Clock Gating: On
        Graphics Medium Grain memory Light Sleep: Off
        Graphics Coarse Grain Clock Gating: On
        Graphics Coarse Grain memory Light Sleep: Off
        Graphics Coarse Grain Tree Shader Clock Gating: Off
        Graphics Coarse Grain Tree Shader Light Sleep: Off
        Graphics Command Processor Light Sleep: Off
        Graphics Run List Controller Light Sleep: Off
        Graphics 3D Coarse Grain Clock Gating: Off
        Graphics 3D Coarse Grain memory Light Sleep: Off
        Memory Controller Light Sleep: On
        Memory Controller Medium Grain Clock Gating: On
        System Direct Memory Access Light Sleep: On
        System Direct Memory Access Medium Grain Clock Gating: On
        Bus Interface Medium Grain Clock Gating: On
        Bus Interface Light Sleep: On
        Unified Video Decoder Medium Grain Clock Gating: Off
        Video Compression Engine Medium Grain Clock Gating: Off
        Host Data Path Light Sleep: On
        Host Data Path Medium Grain Clock Gating: On
        Digital Right Management Medium Grain Clock Gating: Off
        Digital Right Management Light Sleep: Off
        Rom Medium Grain Clock Gating: Off
        Data Fabric Medium Grain Clock Gating: Off
        Address Translation Hub Medium Grain Clock Gating: On
        Address Translation Hub Light Sleep: On

GFX Clocks and Power:
        100 MHz (MCLK)
        800 MHz (SCLK)
        1300 MHz (PSTATE_SCLK)
        625 MHz (PSTATE_MCLK)
        750 mV (VDDGFX)
        8.0 W (average GPU)

GPU Temperature: 35 C
GPU Load: 0 %
MEM Load: 0 %

SMC Feature Mask: 0x00000623a3ddaffb
VCN: Disabled