No matter what I do I cannot get the port to show in the Arduino IDE when I run it using Linux Mint. I have done the dialout command but the Port is always greyed out. Cable and board are fine when used on a Windows system.
I am seriously considering giving up on Linux as I have wasted a lot of time on this problem. Does anyone know what can be done to fix this?
Is the board recognised when you use lsusb.
Does the port show in dmesg?
With dmesg it shows: for usb0 ch341 2-1.1:1.0: device disconnected
That makes me think it's drawing too much current from the USB port or something similar - or at least the USB port thinks your device is. I guess you've tried other cables and different USB ports too?
Disconnect Arduino from computer. Open a terminal and type:
dmesg -w |grep -i usb
What do the last few lines look like? Here's mine:
[ 5.837993] logitech-hidpp-device 0003:046D:1025.0005: input,hidraw2: USB HID v1.11 Mouse [Logitech M510] on usb-0000:00:14.0-11/input2:2
[ 16.180210] usbcore: registered new interface driver btusb
[ 16.322298] usbcore: registered new interface driver rtl88x2bu
Plug the Arduino in;
What do the last few lines look like? Here's mine:
[ 246.259076] ftdi_sio 3-7.3:1.0: FTDI USB Serial Device converter detected
[ 246.259109] usb 3-7.3: Detected FT-X
[ 246.260101] usb 3-7.3: FTDI USB Serial Device converter now attached to ttyUSB0
Type [CNTRL + c] to exit dmesg.
Or BRLTTY or modem manager throwing spanners in the wheels.
In the last 3 lines there is a line interface 0 claimed by ch341 while 'brltty' sets config #1 followed by ch341-uart ttyUSB0: ch341-uart converter now disconnected from ttyUSB0
This leads me to the conclusion that if I remove Braille it would work. How do you remove the braille?
Oh blessed relief! Removing BRLTTY did the trick. Now the port is available and I can upload Arduino sketches to a board. Thank you JCA34F, xfacta and sterretje for your help. This has caused me a lot of wasted time and I wonder why Linux Mint doesn't warn new users that about this sort of issue - maybe it does somewhere and I missed it?
Linux is not for the faint hearted 
It's a known problem and searching this site or the web will find many similar threads (and solutions); you must just figure out the correct search terms.
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