Under-power limit on RX 6700XT too high, possible kernel 6.7+ issue. (Archlinux, mesa/amdgpu)
I used to be able to set power limit via apps like corectrl to 115W and with that I was achieving huge efficiency(perf. vs power drawn was less than 10% vs -90W). Now the new minimum is 190W. This is not the app issue. I read on the net that it may be due to kernel v6.7+, so I tried with v6.6.10 and the cap_min range was again lower and I was able to get my 115W. I reported to regressions@lists.linux.dev already but I also wanted to report it here as it may have to do with amd's driver module. Here is an example of my cap set to 115W: https://www.reddit.com/r/Amd/comments/183gye7/rx_6700xt_from_230w_to_capped_115w_at_only_10/