Hi, We have the same problem with the kernel 2.6.12.
We have both 100 MCM 4+16 and 100 LX FOX boards both running 2.6.12. We tried USB to RS232 converter from acmesystems.it. Both boards (MCM and LX) hangs after smth was written to /dev/ttyUSB0 like echo 12345 > /dev/ttyUSB0 Sometimes it manages to work for a while, but hangs after a time. "Hangs" means console on /dev/ttyS0 does not respond. It also hangs after stty changes serial port settings. Questions: Is the configuration correct? (it follows) Is it correct to change ttyUSB0 settings in the same way as ttyS0, for example? Details: ======== One time I managed to get the following from dmesg right before it hanged: drivers/usb/host/hc_crisv10.c: Got epid_attn for epid 1 with no urb. drivers/usb/host/hc_crisv10.c: R_USB_EPT_DATA = 0x0 drivers/usb/host/hc_crisv10.c: R_USB_STATUS = 0x17 I enabled the following USB features in kernel configuration: CONFIG_ETRAX_USB_HOST=y CONFIG_ETRAX_USB_HOST_PORT2=y CONFIG_USB=y CONFIG_USB_DEVICEFS=y CONFIG_USB_STORAGE=y CONFIG_USB_SERIAL=y CONFIG_USB_SERIAL_FTDI_SIO=y CONFIG_USB_SERIAL_PL2303=y I connected the USB to RS232 converter and to my workstation. When the FOX board starts it tells the following: usbcore: registered new driver usbserial drivers/usb/serial/usb-serial.c: USB Serial Driver core v2.0 drivers/usb/serial/usb-serial.c: USB Serial support registered for FTDI SIO drivers/usb/serial/usb-serial.c: USB Serial support registered for FTDI 8U232AM Compatible drivers/usb/serial/usb-serial.c: USB Serial support registered for FTDI FT232BM Compatible drivers/usb/serial/usb-serial.c: USB Serial support registered for FTDI FT2232C Compatible drivers/usb/serial/usb-serial.c: USB Serial support registered for USB-UIRT Infrared Tranceiver drivers/usb/serial/usb-serial.c: USB Serial support registered for Home-Electronics TIRA-1 IR Transceiver usbcore: registered new driver ftdi_sio drivers/usb/serial/ftdi_sio.c: v1.4.2:USB FTDI Serial Converters Driver drivers/usb/serial/usb-serial.c: USB Serial support registered for PL-2303 pl2303 1-2:1.0: PL-2303 converter detected usb 1-2: PL-2303 converter now attached to ttyUSB0 usbcore: registered new driver pl2303 drivers/usb/serial/pl2303.c: Prolific PL2303 USB to serial adaptor driver v0.12 Best regards, Alexey Luchko.
