Octoprint 1.7.0 fails to connect to printer, 1.6.0 is fine

General
1

Not sure it has been reported or not but 1.7.0 has connection problems, or at least it does for me.

I had been on 1.6.0 for some time ,and today I upgraded to octoprint 1.7.0 but now octoprint is unable to connect to my prusa mk2s+ printer. It times out waiting on a response from the printer as it goes through all the different baud rates, no matter how many times I try and even after several reboots of the pi itself. So, I have now downgraded back to version 1.6.0 and octoprint is able to connect to the printer just fine.

2

The only way we would be able to look into this is with the log files from the connection attempts, on both versions.

3

Also does the problem appear in safe mode in 1.7.0 or not ? Also please activate serial logging, as it could give us more detailed information about the issue

4

Thanks @Charlie_Powell, I am printing something right now, so I will collect logs from both versions after this completes.

5

Thanks @SwHawk I did not know there was a "Safe Mode". I will try that too after this print completes.

6

False alarm! For some reason, the upgrade to 1.7.0 changed the printer's port to /dev/USB (or something like that), but my printer is on /dev/ttyACM0... So, after I noticed that change, I was able to switch it to the correct port and it connected just fine.