How exactly did you use this command I mean what file did you edit to put this command?
I used this to try setting frequency to 100:
./cgminer -o stratum+tcp://solo.ckpool.org:3333 -u ADDRESS -p x --gekko-compacf-freq 100
I also tried the same with --gekko-compac-freq 100 instead. Nothing, it stayed the same, 200. Then, I wrote a config file, like in the github issue you shared. I let cgminer create the default by pressing 'W', and then I changed this line:
"gekko-compacf-freq": "200",
To:
"gekko-compacf-freq": "100",
Still, I run "./cgminer" and encounter the same issue. I haven't tried changing gekko.conf in kano's files. I'm trying to lower the voltage by counterclockwise switch, and see how this goes. I also don't have bat files, I'm in Linux Mint.
Edit: This is a screenshot of what I'm getting right now. As you can see, it stills tries to push it to 200 frequency for some reason, even though it tries to drop it (see where it says "200->190"): https://ibb.co/RGSf1fQw.