esp32s3 pauses when PC sleeps

[krismc]

My early experiences with esp32s is that they will continue to run, squirting diagnostic prints about program flow out the usb port after the PC has gone to sleep. I figured this was because a sleeping PC keeps 5v on the USB to power the esp32 & that there was no handshaking usb involved.

So recently I got a https://www.waveshare.com/esp32-s2.htm?sku=21179 an s3 with an lcd. I'd had some problems with prints to the usb not restarting after a deepsleep so the lcd was a better alternative.

Today I had a non deepsleeping program running with prints going to both the usb & the lcd & I happened to be present when the PC went to sleep. To my great surprise the run of prints to the lcd stopped. At first I thought a spike from the PC power down had glitched the esp32 & locked up the program but when I woke up the PC via the keyboard code execution on the esp32 resumed & the lcd prints continued from where they had paused.

Has anybody else encountered this behaviour in a repl (I was using atom)? Is there vendor code in the esp32 monitoring some usb line that changes state when the PC powers down & pausing my code or what? I mean I've often wished for the ability to pause program execution to have a think about some anomaly before resuming but I never figured sleeping my PC would be the way to achieve that.

[projectgus]

What MicroPython version are you using?

In particular, it looks like this board uses the native USB for its serial connection and this bug sounds similar to this: #18000 - that issue was fixed in MicroPython v1.26.1 patch release.

[krismc]

I'm on 1.24.1, I'll try the later version, tnx