Pc reboot / 5i25(6i25) & 7i77

My understanding is that your computer reboots only when you run Linuxcnc?
You could install the latest Linuxcnc and test your lathe  with your current setup files (ini, hal, ui …)

""""""
-Check if the ram memory is detected correct in the bios.
-Replace ram memory, check cpu temperature (old thermal paste?)
-Another/Newer kernel
-maybe it's just a defect in the mb or cpu
""""""
Ram is detected ok in the bios and we had three different mb where reboot issue
is present, when zen 3 Ryzen prosessor is installed (Ryzen 5 5600G or Ryzen 7 5700X).

We have been also tested with latest release of linuxcnc (2.9.2 and 2.9.3) with
rt-kernel and realtime kernel (5.4.258).


"""
Remove the lathe power plug, try again.
"""
We have started linuxcnc without lathe hw plugged in and it start until error of
missing I/O-information about door etc. When lathe hw is connected to 6i25 pc reboot
at line addf hm2_5i25.0.read servo-thread.

When we comment that line out, we can start linuxcnc, but all is not working ok
(we can see I/O information etc, but could not start machining).


"""
My understanding is that your computer reboots only when you run Linuxcnc?
You could install the latest Linuxcnc and test your lathe  with your current setup files (ini, hal, ui …)
"""
We have tested latest versions and still have reboot issue with zen 3 prosessor. Latest versions
works ok with older pc hw and we can machining with setup from old pc (ini, hal etc.).

We also tested old hdd (old linuxcnc and ubuntu) with new pc hw (zen 3) and have this same reboot
issue with it. Old hdd with old linuxcnc&ubuntu works ok when Ryzen 5 1600 or older cpu is in use.

Otherwise all tested pc works ok and those tested pc's have been used several months in other use
without issues.
 

Kernel 5.4 is not that new, there have been some issues with Ryzen CPUs. So if Tommylight's solution doesn't work you could try this rt kernel 6.10

drive.google.com/drive/folders/1L28lG0zD...2XQJx?usp=drive_link