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Yes, iov2 has been removed in master.
Simple cases (like yours seems to be) can be handled by a ngc remap for M6 while more complex situations can be handled by a python remap of M6 and or T.

If you just need a safety interlock you might be able to simply add some hal logic that inhibits the relevant output pins until certain conditions are met.

That error report still refers to the 'pid.s.do-pid-calcs' not being found. Maybe you attached the wrong file?

Yes, exactly. But do you know of any example configs or even discussions on how to implement a homing origin switch? I don't think I have found any.

I didn’t think the J1900 had hyper threading. I didn’t see it but I will look agian.

In BIOS hyperthreading must be disabled, and TPM also.
And in case you find "aggressive link management" regarding PCI-E, also disable.

I went through the google dock and enlisted the help of ChatGPT and this is what I did and the results.

• CPU: Intel Celeron J1900 @ 1.99GHz (4 cores)
• Kernel: 6.3.0-rt11-linuxcnc (upgraded from 6.1.0)
• NIC: Realtek RTL8111/8168/8411 (using r8168-dkms driver 8.051.02)
• Power Supply: Switched to a more stable supply from the plasma table

What I Did:

1. Installed the 6.3.0-rt11-linuxcnc kernel.
2. Installed and configured the r8168-dkms driver.
3. Disabled EEE on the NIC (r8168.EEE=0).
4. Set kernel boot parameters:

isolcpus=1,2,3 nohz_full=1,2,3 rcu_nocbs=1,2,3 pcidle.max_cstate=1 processor.max_cstate=1 idle=poll


5. Assigned IRQ 91 (NIC) to CPU core 1.
6. Set all CPUs to performance governor (persistent in rc.local).
7. Confirmed BIOS settings: C-states disabled, Turbo Boost off, EIST off.