Hi all. I am attaching the RS232-TTL via a serial-USB converter on my machine.
However, when I connect a putty-session with my embedded-device, I see strange issues (garbage characters transmitted from embedded-device to putty; nothing can be read from putty into embedded-device). It seems that there is some issue with the driver. Lots of these lines are seen in dmesg :: ######################################################################################## [ 8657.022997] ch341-uart ttyUSB0: usb_serial_generic_read_bulk_callback - nonzero urb status: -71 ######################################################################################## Other informations :: ######################################################################################## ajay@ajay-HP-15-Notebook-PC:~$ lsusb Bus 001 Device 002: ID 8087:8001 Intel Corp. Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 003 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub Bus 002 Device 003: ID 05c8:036e Cheng Uei Precision Industry Co., Ltd (Foxlink) Bus 002 Device 002: ID 0bda:b001 Realtek Semiconductor Corp. Bus 002 Device 011: ID 1a86:7523 QinHeng Electronics HL-340 USB-Serial adapter Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub ######################################################################################## ######################################################################################## ajay@ajay-HP-15-Notebook-PC:~$ lsmod | grep ch341 ch341 13761 1 usbserial 38972 3 ch341 ######################################################################################## ######################################################################################## ajay@ajay-HP-15-Notebook-PC:~$ uname -a Linux ajay-HP-15-Notebook-PC 3.16.0-30-generic #40~14.04.1-Ubuntu SMP Thu Jan 15 17:45:15 UTC 2015 i686 i686 i686 GNU/Linux ######################################################################################## Any chance this can be made to work? Any upgrade that might solve the issue? We will be grateful for ideas. Thanks and Regards, Ajay -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
