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@Sigma1912 has posted a way to fix the problem on github but that means to build everything from the sources (www.linuxcnc.org/docs/html/code/building-linuxcnc.html).
If that is not "in your blood" you may have to wait for 2.9.7... I don't know if you could (or should) install my .deb file.
 

I'm updating to Debian 13 and I see it's downloading version 6.12.48 now.
I'm really excited—this issue has been bothering me for nearly half a year, and I hope it gets resolved.

It was just an "apt upgrade", I am using debian trixie on that computer.
It may not be the kernel for you. It may not have been for me either, I messed around with many things that day.
You can always try an "apt update" followed by "apt upgrade". That should install the latest kernel and many more upgraded apps.

The messages you get is what I got using Realtek network interface.
What network interface do you have? Find out with "lspci"
 

PCW wrote:

If using a THCAD for ohmic sensing has issues with water. the most likely issue
is that the sense  resistor is too high a value.

I agree and I am pretty sure i mentioned somewhere a long time ago that a lower value resistor should be used for sensing. Something that will result in 20-50mA current should do just fine, maybe more as the water used will get lower resistance the more cuts are done and as it evaporates.

Thanks everyone for the feedback. I’ll keep you posted as things progress.

Thank you for your response!
I'd like to try your method and hope it can resolve my current issue.
I haven't worked on updating the preempt-rt kernel before.
Are there any tutorial posts you could recommend to me?
Also, where can I download the 6.12-48 version you mentioned?

Current Kernel: Linux debian 6.1.0-23-rt-amd64