Setting a custom max voltage/max clock doesn't seem to affect lower power states when it should

[pinbuck]

GPU: rx 580

The problem: Undervolting requires all previous power stages to have the same max voltage and max clock to do its intended goal: reducing noise, thermals, and power consumption

pine@BOXOFDOOM:~$ cat /sys/class/drm/card1/device/pp_od_clk_voltage
OD_SCLK:
0: 300MHz 750mV
1: 600MHz 769mV
2: 900MHz 918mV
3: 1145MHz 1137mV
4: 1215MHz 1150mV
5: 1257MHz 1150mV
6: 1300MHz 1150mV
7: 1250MHz 1100mV
OD_MCLK:
0: 300MHz 750mV
1: 1000MHz 800mV
2: 2000MHz 950mV
OD_RANGE:
SCLK: 300MHz 2000MHz
MCLK: 300MHz 2250MHz
VDDC: 750mV 1200mV

Steps to reproduce problem: Set core clock, core voltage, and memory clock to less than previous power states' clocks within LACT GUI

The solution: Similar to CoreCtrl or MSI Afterburner, when the user sets a max number, all previous stages should be no higher than that number.

Also, 0xfffd7fff should probably be the right ppfeaturemask to recommend in the readme for AMD gpus, while undervolting/overclocking, it leaves power saving features which 0xfffffff turns off.

[ilya-zlobintsev]

You're right, it currently only affects the highest power state. This should be relatively easy to fix.

Regarding the feature mask: when you enable overdrive from LACT with the button, it does apply only what is necessary for overdrive (it takes the current mask and adds overdrive). I suppose the instructions for setting a boot option manually could include this as well.

[ilya-zlobintsev]

This has been fixed.

[pinbuck]

Thanks, very good project 🫡