Active3 months ago
I have a USB to serial adapter. It works OK with my desktop computer, but no on my laptop. My desktop PC is a generic computer (Athlon 64 X2 6000+ on board MSI K9AGM, 6 USB 2.0 ports, no USB 3.0 ports), and my laptop is an HP ENVY4-1015DX (2 USB 2.0 ports, 1 USB 3.0 port)
![Ubuntu Linux Usb Serial Adapter Ubuntu Linux Usb Serial Adapter](/uploads/1/2/4/9/124916431/906350254.jpg)
USB-Serial Port adapter (RS-232) in Ubuntu Linux There are two other articles on a serial port adapter for Windows. Below is the instructions for Linux and how to connect your serial adapter while using Linux. This should work for most people using Linux and a serial adapter or usb to rs232 driver which is being discussed. Welcome to the Linux Mint forums! For help, knowledge, and fellowship. HL-340 USB-Serial adapter - new line added Bus 001 Device 001: ID 1d6b:0002 Linux.
Dec 22, 2011 5) The FTDI serial USB driver in Linux contains many product IDs for Sealevel devices. However, the newest devices may not be currently included in the driver. The driver allows a single vendor and product pair to be passed at module load time. Using these parameters, it is unnecessary to recompile the driver.
My desktop has Ubuntu 12.04.2 64 bits, kernel 3.5.0-37. When I plug it into any USB port on this PC, I got this in kern.log:
However, when I plug exactly the same adapter with the same USB cable into any port on my laptop (it doesn't matters if I plug it into a USB 2.0 or USB 3.0 port), I got:
My laptop has Ubuntu 12.04.3 64 bits, kernel 3.8.0-30.
I see that the main difference is that, in my PC, Ubuntu uses driver ohci_hcd, and in my laptop Ubuntu uses xhci_hcd. I've tried doing:
And also tried:
However, none of these works. In first case, no error at modprobe, but system still uses xhci_hcd. In second case, on modprobe it gives me an error:
What else could I do to solve my issue? Thanks!
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Usb To Serial Adapter Linux
2 Answers
I've found that my Serial-to-USB converter (ch341-uart) doesn't works with USB 3.0 ports. Unfortunately, my HP Envy doesn't have a USB 2.0 hub, all ports are reported as USB 3.0 ports to OS. Seems like this device isn't supported under USB 3.0. However, I've got a USB 2.0 hub. If I connect this hub to any port, and then connect the Serial converter to this hub, it works OK, even using xhci_hcd:
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if anyone have problems with ch341 drivers on Ubuntu 14.04 I have a patched driver and it works with 3.13.X kernel:
thanks to:
Usb To Serial Adapter Linux Ubuntu
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