What is the problem?
After months of problem-free activity, I'm suddenly having all kinds of problems connecting Octoprint, and when it does connect, then connecting to my CR10 Mini. When the printer is plugged in, I get extraordinarily long ping times to the Pi from my computer, consistently over 1000ms. When the printer is unplugged, the pings are typically <5ms. Sometimes, my browser (Chrome running under Linux Ubuntu 14.04) won't connect to octopi.local, nor to the explicit wired and wireless addresses (I use static IP addressing, so those don't change). Other times it will connect to the Pi and start the Octoprint interface, but Octoprint won't connect to the printer ("Failed to autodetect serial port, please set it manually"). And every once in while, it will all connect and work. I've not determined any repeatability.
I'm wondering if it's a hardware problem and I need a new Pi. But if the problem is the USB port on my printer....
What did you already try to solve it?
I've tried rebooting and power cycling the Pi, rebooting and power cycling my router, using both wired and wireless interfaces, changing USB cables, changing USB ports, even downloading a new OctoPi image on a different SD card.
Additional information about your setup (OctoPrint version, OctoPi version, printer, firmware,
serial.log or output on terminal tab, ...)
I'm running Octoprint 1.3.10 and OctoPi 0.15.1 and 0.16. My printer is a CR10-Mini. I connect via Chrome under Ubuntu 14.04.