Hm, for me enabling the EPP driver, either manually or using the PPD patches seems to sometimes cause AMD CPU stuck in low-speed state after system resume. I can temporarily get out of that state by toggling the power profile and it also seems to randomly unstick itself, but I do think something isn’t quite right with EPP and as such those patches might cause performance regressions for some users? Anyone else experienced their CPU getting stuck at 544Mhz with those patches after suspend sometimes?
EDIT: Seems to be [Bug 218305] New: Ryzen 7 7840HS gets stuck at 544MHz frequency after a random number of suspend/resume cycles