Quote from: MrMik on November 17, 2022, 12:10:53 PM

Obviously the CHMOD 777 command did not work, which is why I asked the question when I was stuck being unable to execute the miner software. I still don't understand why, but no problem, it will eventually become clearer.

I am not sure myself why, but it just needs to be executed as root (as you say in your next post), it's not a permission problem.

Quote from: MrMik on November 17, 2022, 12:10:53 PM

I had no idea what CHMOD 777 does, I just knew it because some customer support person told me to use it when I had issues with a VPN not wanting to cooperate.

We're all here to learn!

Quote from: MrMik on November 17, 2022, 12:10:53 PM

That is of course very sensible advice, but I have already added several fans and built a contraption that will let me test what kind of fans and fan speeds will work best for various conditions.
When I use the Full Package Apollo (with my contraption) and set the temperature curve to 65/70degC, the built-in fan continues to run at around 1800rpm and the temperature stays below 60C, but I can still hear it. It's much quieter, but not as good as what I am aiming for.
But with the Standard Apollo I cannot (yet) set the temp curve even a little higher to get the built-in fan to spin at it's apparent minimum speed of 1800rpm. So it is louder than a Full Package Apollo with the same added fan contraption.

I see. So, the start_apollo.sh script actually includes a ton of comments for customization and tuning.
https://github.com/jstefanop/Apollo-Miner-Binaries/blob/main/linux-aarch64/start_apollo.sh

Unfortunately, setting the fan speed seems unsupported on the standard units.
On the full unit, the fan is recognized as a system fan and controlled that way: https://github.com/jstefanop/apolloapi/blob/master/scripts/os_stats#L44
I don't think that works through USB, though.

Quote from: MrMik on November 17, 2022, 12:10:53 PM

The contraption has 2 SPDT switches and 2 trimpots to adjust the reduced fan speed for 2 fans. It put's the power supply under the Apollo and uses exhaust air from the power supply to cool the Orange Pi. That might be a bad idea, but I will soon have some measurement data to clarify that.

In case you are very confident about your fan set up, you could of course always unplug and remove the stock fan, though that would probably kill your warranty.. Wink