I have connected a serial -> USB converter cable between a remote serial port and the local USB. I am trying to set the baud rate and all. See Background: later in the message for more details. Something looks wrong. I do not get any data. Here I have listed the steps for this as I see it: I see the 4 devices from lsusb: Bus 002 Device 006: ID 0403:6001 Future Technology Devices International, Ltd FT232 USB-Serial (UART) IC Bus 002 Device 007: ID 0403:6001 Future Technology Devices International, Ltd FT232 USB-Serial (UART) IC Bus 002 Device 008: ID 0403:6001 Future Technology Devices International, Ltd FT232 USB-Serial (UART) IC Bus 002 Device 009: ID 0403:6001 Future Technology Devices International, Ltd FT232 USB-Serial (UART) IC The kernel modules are loaded automatically (from lsmod): ftdi_sio 52936 4 usbserial 40904 9 ftdi_sio The ftdi_sio module lists the USB IDs as a recognized alias (from modinfo): alias: usb:v0403p6001d*dc*dsc*dp*ic*isc*ip* The four devices show up as: crw-rw---- 1 root dialout 188, 0 2010-04-19 10:27 /dev/ttyUSB0 crw-rw---- 1 root dialout 188, 1 2010-04-19 10:27 /dev/ttyUSB1 crw-rw---- 1 root dialout 188, 2 2010-04-19 10:27 /dev/ttyUSB2 crw-rw---- 1 root dialout 188, 3 2010-04-19 10:27 /dev/ttyUSB3 I am a member of the dialout group. I am running an application that I have used with serial ports to great effect. It is accessing these devices (lsof): wish 5103 rst 4u CHR 188,0 0t0 4838 /dev/ttyUSB0 wish 5108 rst 4u CHR 188,3 0t0 4854 /dev/ttyUSB3 wish 5115 rst 4u CHR 188,2 0t0 4868 /dev/ttyUSB2 wish 5120 rst 4u CHR 188,1 0t0 4882 /dev/ttyUSB1 The program sets the devices to be 38400 baud, no parity, one stop bit. Oddly, nothing is arriving on the port. So, I thought I would check with setserial that the port settings are as expected. setserial -g /dev/ttyUSB* /dev/ttyUSB0, UART: unknown, Port: 0x0000, IRQ: 0, Flags: low_latency /dev/ttyUSB1, UART: unknown, Port: 0x0000, IRQ: 0, Flags: low_latency /dev/ttyUSB2, UART: unknown, Port: 0x0000, IRQ: 0, Flags: low_latency /dev/ttyUSB3, UART: unknown, Port: 0x0000, IRQ: 0, Flags: low_latency Is this what setserial should report for this type of serial port? Maybe it does not work with USB serial ports? Background: I am trying to diagnose a Linux kernel boot problem with a diskless openSUSE 11.2 system at a remote location. I have used the ever popular kernel command line option on the remote: console=ttyS1,38400n8 splash=0 textmode=1 This has always worked for me. The person at the remote tells me that all listing on the console stops just when I would expect it to. So I am fairly certain the kernel is sending the data on the serial port. The serial port is connected to another openSUSE computer next to it. I am logged in to that one from a remote computer and running the serial port monitor (wish). But nothing arrives. The setserial listing is mysterious. Anyone used these sorts of devices? -- Roger Oberholtzer OPQ Systems / Ramböll RST Ramböll Sverige AB Krukmakargatan 21 P.O. Box 17009 SE-104 62 Stockholm, Sweden Office: Int +46 10-615 60 20 Mobile: Int +46 70-815 1696 -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org For additional commands, e-mail: opensuse+help@opensuse.org