I am running Ubuntu 16.04 and using Arduino IDE 1.8.9.
I am using the Arduino mkr1000. I'm not sure what I need to do but this is almost insane.
It does this thing when it works where it changes between ACM0 and ACM1 so almost every upload the port needs re-selected.
Sometimes it has more character. I am currently able to get it to show up using the method of pressing reset twice rapidly. However after the upload states it is done and "cpu reset" the device disappears.
I am using the built in LED to indicate the start of the sketch running.
When it drops off the com port it is inaccessible and doesn't light the led at the beginning of setup. Pressing reset once has no effect. Only the pressing twice has any effect, but then the mkr1000 is in programming mode? and the serial port wont open a terminal.
Please help, I have looked and can't find any information that helps.