I have a arduino clone that is not being assigned a /dev/tty by Debian Stretch (Stable). It does have the ch340g chip. I have tried the driver from the manufactures site with no joy. Would the lack of a bootloader cause this problem?


  • Trying a random manufacturer driver makes no sense on a Linux system, the proper CH34x driver is already in the mainline kernel sources. To figure out what is actually wrong you should start with dmesg and lsusb. Mar 11, 2018 at 19:19
  • Been there done that. And the source is from the Actual board manufactures site. usb 2-1.3: new full-speed USB device number 14 using ehci-pci [136679.079624] usb 2-1.3: device descriptor read/8, error -32 [136679.207639] usb 2-1.3: device descriptor read/8, error -32 [136679.314532] usb 2-1-port3: unable to enumerate USB device
    – rbees
    Mar 11, 2018 at 19:24
  • 1
    this information should have been in your question when you posted it . ... please update your question with this info (use the edit button)
    – jsotola
    Mar 11, 2018 at 20:07
  • What is actually wrong with the board is a different question than was asked. Though again, despite being irrelevant to the actual issue, with Linux you all but never want to use a manufacturer's driver, and definitely not when there's a known-good and actually code reviewed one in the mainline kernel sources. Mar 11, 2018 at 20:16

1 Answer 1


No. On Arduino-style boards which use distinct chips for the main processor (ATmega328p) and Serial interface (CH34x/ATmega8u2/ATmega16u2/FT2232 etc) the presence or absence of a bootloader on the main processor has no bearing on the recognition of a USB/Virtual Serial device by a host.

However on ATmega32u4 and some ARM-based boards it can.

Since you are describing a classic board with distinct chips, whatever your actual issue is, it is something else.

  • Figured as much. I was just hoping that when a new board gets here I could install a bootloader to it and have it start working. So I expect that the chip is bad and I have a brick. To bad it would cost as much to send it back as it cost in the first place.
    – rbees
    Mar 11, 2018 at 19:27
  • If you desolder the USB chip the ATmega processor might still be good. Mar 11, 2018 at 20:15

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