I have two systems running linux mint. Laptop running LM 18.1 cinnamon with arduino 1.8.13; also have older desktop running LM 18.1 cinnamon but with arduino 1.8.12
Used the desktop for a previous esp8266/nodemcu project. It is slow, so I thought I'd switch to faster laptop. Using the same usb cable on both systems with the same nodemcu, and with esp 2.7.3 board manager on both systems--- only the old desktop system can find the nodemcu on a serial port so that i can flash it.
On the newer laptop i have serial ports listed, but nothing is ever checked when i plug in the board. Plugging direct into laptop usb ports, no hubs.
Restarted computer, restarted arduino ide, unplugged board, reset board, tried board flash button, no pins connected to the board. Rechecked I could flash with old desktop...I could. Dialout permission is ok.
Looking for advice.