Processing Serial. list() no show anything

Hi, I have had this problem for quite a long time, processing can’t find my serial list, even I


it shows nothing. Can I ask how to solve it? Or anyone knows how processing detects serial, maybe is my PC problem so I can further find my problem. Thx.


Operating system?
Are you using the Processing IDE from here?
Which version?

Do you have a serial COM port to detect and list?
Check your Device Manager if using Windows:


With an Arduino connected I see this:

When I disconnect the Arduino I see this: