"error finishing read" with Mesa 7i92T on fresh install

I'm experiencing the following on a fresh install of LinuxCNC from the iso (2.9.3):

this happens intermittently, but typically within a few seconds of jogging the machine around after enabling it. No motors are hooked up nor anything attached to the 7i92T other than +5V power. If I enable the machine but don't move any axes it will eventually happen after some number of minutes. I'm using a generic mini PC and have tried two identical PCs with a fresh LinuxCNC install and have the same problem on each. I've also switched ethernet cords with the same result.

I've read through this thread forum.linuxcnc.org/27-driver-boards/4691...error-finishing-read and nothing really conclusive came out of it. I do also get a real time error on LinuxCNC startup or shortly after, but doing latency tests in pncconf shows fairly good numbers. I don't have the specifics in front of me but I can get them.

 I have not tried switching the +5V supply but that is my next step.

Any thoughts on how I can further diagnose this?

Thanks!

Scott

Can you run this command:

sudo chrt 99 ping -i .001 -q 10.10.10.10
 hit control C
then run it again
sudo chrt 99 ping -i .001 -q 10.10.10.10
wait about a minute and hit control C again
 and copy paste the result here
(Those commands assume you have the 7I92T IP address set for
10.10.10.10,  if not, use 192.168.1.121 in the ping commands)

Also run
lshw -class network
to determine what Ethernet hardware you have