What kind of USB to serial device do you have? It works for me for just the USB/serial cable with nothing connected to it: lsusb grep -i serial Bus 002 Device 004: ID 067b:2303 Prolific Technology, Inc.

PL2303 Serial Port sudo setserial -av /dev/ttyUSB0 /dev/ttyUSB0, Line 0, UART: 16654, Port: 0x0000, IRQ: 0 Baud_base: 460800, close_delay: 0, divisor: 0 closing_wait: infinite Flags: spd_normalPS: I cannot change any settings though. Maybe that is simply determined by whatever pace programs or devices communicate through it. I wonder if my USB cable is USB 1.0 and adummy's is USB 2.0. The one I got is just to communicate with an ancient Garmin GPS45 (from mid-1990's) at 4800 baud.

Although, I have not figured out how to do that in Linux yet (programs seem to use minimum 9600 baud). Well I guess this solves my problem my computer doesn't see the 4 ttyUSB* connections as serial ports.

Setserial /dev/ttyS4: Cannot set serial info. Invalid argument # setserial /dev/ttyS5 irq 5 port 0x118 uart 16550A Cannot set serial info: Invalid argument. Strange thing. $ setserial -v /dev/ttyUSB0 Cannot get serial info: Invalid argument. I'm using prolific USB-RS232 converter: # lsmod grep pl2303 pl2303.

Cannot change baud rate on usb serial. Sudo setserial -av /dev/ttyUSB0 Cannot get serial info: Invalid argument $ ls -l /dev/ttyUS. Able to set baudrate. Cannot set baud rate on USB serial port for. Recognized and set up as /dev/ttyUSB0. TtyUSB0 -a Cannot get serial info: Invalid argument $ sudo setserial.

Lsusb gives: Bus 008 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 007 Device 002: ID 1bc7:1004 Bus 007 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 006 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 005 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 004 Device 002: ID 0461:4d64 Primax Electronics, Ltd Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1. Guyver Dark Hero Avi. 1 root hub Bus 002 Device 002: ID 058f:6363 Alcor Micro Corp. Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 001 Device 003: ID 050d:845a Belkin Components Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub lsusb grep -i serial doesn't return anything.

Date: Fri, 03 Jun 2005 15:17:51 +0200 Package: setserial Version: 2.17 I'm trying to use an USB-to-Serial device, model: 'U232-P9' (see ). Date: Fri, 3 Jun 2005 22:03:28 +0200 Hello On Fri, Jun 03, 2005 at 03:17:51PM +0200, Peer Janssen wrote: >Package: setserial >Version: 2.17 >>>I'm trying to use an USB-to-Serial device, model: 'U232-P9' (see >). Date: Sat, 7 Jul 2012 11:33:31 +0200 (CEST) Package: setserial Version: 2.17-48 setserial gets the information via an ioctl() call. In case the driver for your device does not support TIOCGSERIAL, the 'invalid argument' is returned. On the other hand statserial uses TIOCMGET, so depending on the kernel one or the other feature might not work.

Anyway, setserial is only needed to set some internal register of the hardware. In order to set the baudrate you should use stty. So I close this bug now. If you have any questions please contact me or reopen this bug. Bug archived. Request was from Debbugs Internal Request to internal_control@bugs.debian.org.

(Sun, 05 Aug 2012 07:27:13 GMT) (,, ). Send a report that.

Debian bug tracking system administrator. Last modified: Thu Feb 15 07:; Machine Name: buxtehude Debbugs is free software and licensed under the terms of the GNU Public License version 2. The current version can be obtained from. Copyright © 1999 Darren O. Benham, 1997,2003 nCipher Corporation Ltd, 1994-97 Ian Jackson, 2005-2017 Don Armstrong, and many other contributors.