PYNQ-Z1 hangs after a couple of minutes (same result for different SDcard images)

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Hello,

I recently tried my Pynq Z1 again. I wrote the recent Pynq 3.0.1 release to the SD card and waited for the board to boot. The leds are flashing, ping and ssh are working. I can also briefly access it using the Jupyter server/webpage.

However, after a certain amount of time (I would say about 2 and 3 minutes) the board hangs.
I monitor this with ping, at this point I don’t receive any messages from the Board.
Same if I use ssh and monitor the board with htop. It also hangs after some time.

Sometimes I can wait a couple of minutes and ping the board again but I will hang again after ping runs for 1-2 minutes.

I also tried an older release of Pynq (Version 2.5). The result is more or less the same.
I also tried different USB cables / ports. Same results. For now, I am at my wit’s end.
Does someone have some suggestions what might crash/bootloop the Board? Thanks for any help!

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For clarification, I have attached the ping output from my desktop machine (direct connection to the Pynq Z1 using a second ethernet interface).
Notice the icmp_seq jump from 119 to 413, from 588 to 882, and finally from 1057 to 1351

pynq_ping_crash.txt (39.5 KB)

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I think I was able to find the problem on my own. After switching the cable and not seeing any difference I booted into Windows. Here it works, I can ping the Pynq Z1 forever, so its a problem with my network interface on my machine, either power management, firmware or driver that is powering the network interface after some minutes down. Thanks for your time.

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