New micro PC problems

Not sure what that does, but it had no effect... The first error pops up immediately on opening LinuxCNC and the Smart Serial port 0: Dolt not cleared from previous servo thread follows close behind. Other errors pop randomly if I leave the window open long enough

Can you launch LinuxCNC and then (in a terminal) type:

halcmd show param *.tmax
 and post the results here
 

Sure thing:

Parameters:
Owner Type Dir Value Name
36 s32 RW 0               hm2_7i97.0.read-request.tmax
36 s32 RW 7031644   hm2_7i97.0.read.tmax
36 s32 RW 56740        hm2_7i97.0.write.tmax
29 s32 RW 6012          motion-command-handler.tmax
29 s32 RW 23456        motion-controller.tmax
39 s32 RW 14320        pid.s.do-pid-calcs.tmax
39 s32 RW 14072        pid.x.do-pid-calcs.tmax
39 s32 RW 5820          pid.y.do-pid-calcs.tmax
39 s32 RW 10496        pid.z.do-pid-calcs.tmax
30 s32 RW 7064596    servo-thread.tmax


Looks like I have a real problem on hm2_7i97.0.read??

Any ideas what could cause this? Is my 7i97T defective?

Try another 5V power supply for the Mesa 7i97.
And another network cable.

36 s32 RW 7031644   hm2_7i97.0.read.tmax

Looks like multiple ms of response time, it could be cable or power related
but most likely a problem with the host PC (either setup, OS dependent or inherent
in the PC hardware)

If you get a red init light after LinuxCNC loses communication, the problem
is _not_ power related.

Please review th e heading  Network latency on page 3 of the guide I've been updating ?
docs.google.com/document/d/1jeV_4VKzVmOI...diY/edit?usp=sharing

Thank you all of you.  After reviewing your document Rod, I realized my m.2 network card (wireless) was Realtek.  Uninstalling this solved the problem.  I ordered an Intel M.2 wireless card and will give that a shot.  If that also has a problem I'll try USB, then I'll just accept that I don't get wireless.

Usually USB WIFI dongles are fine, conversely MiniPCIE WIFI cards
are often horrible for network latency. I suspect this is because
they include BIOS ROMs that contain unspeakably bad code...

I suspect that the unspeakably bad code means that the m.2 is not much different to pcie.
However I have noticed in more recent distros, performance has imnproved in one instance my Gigabyte Brix ran  horrific latency with the pcie card installed when I first started so I ran a USB wifi dongle.  On Bookwoem its now fine.