Just tested a few more times after switching back to power-profiles-daemon-0.13-2.fc39.x86_64 so I can control the setting manually and I don’t think it is related to the epp setting.
base state - platform_profile: balanced, scaling_governor: powersave, epp: power - all cores can reach 4000+MHz. Kernel is 6.6.8-200.fc39.x86_64
- Test 1: reboot, still on power, all cores can reach 4000+MHz. epp starts out set to performance. set it back to power
- Test 2: reboot, on battery, cores 8-11 stuck at 1666MHz. Changing epp, platform_profile has no effect. Setting scaling_governor to performance lets all cores reach 4000+MHz. Set scaling_governor back to powersave and cores continue working normally.
- Test 3: reboot, on battery (epp was performance at time of shutdown) - all cores end up stuck at 544MHz. Toggle scaling_governor from powersave to performance and back to unlock core frequencies.
So far, the only thing I find that makes a difference is whether I’m on battery or not during boot (even this, I think I have not tested enough to prove), but at least epp does not seem to make a difference.
Note: to toggle the scaling_governor: sudo cpupower frequency-set -g performance && sudo cpupower frequency-set -g powersave
I’ll try to test some more this week.
@fw13amd were you able to determine if slow clock speeds are the cause of the lag you experience? I didn’t mean to highjack your thread…