Cat Ttys0 Input/output Error
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Linux Serial Port
site for users of Linux, FreeBSD and other Un*x-like operating systems. Join them; it only takes a minute: Sign up Here's how it works: Anybody can ask a question Anybody can answer The best answers are voted up and rise to the top cat /dev/ttyS0 Input/output error up vote 2 down vote favorite I minicom created infrared receiver as in LIRC manual (http://www.lirc.org/receivers.html). And tested it on windows using program called Terminal. When I switched on RTS pin DCD pin was also switched on and when I used remote controll DCD was blinking. So everything works with hardware. Next I tried using the same hardware on Linux Mint 17 on same computer as in http://lifehacker.com/5527752/control-your-desktop-pc-with-a-remote-using-lirc but with no luck: piotrek-H87-HD3 piotrek # cat /dev/ttyS0 cat: /dev/ttyS0: Input/output error I also followed http://www.commandlinefu.com/commands/view/10218/ttys0-terminal-on-serial-connection. In this tutorial there was the same error I had so I tried looking in BIOS setup but serial ports were enabled. Why isin't it working? Some information data: piotrek-H87-HD3 piotrek # cat /proc/tty/driver/serial serinfo:1.0 driver revision: 0: uart:16550A port:000003F8 irq:4 tx:0 rx:0 1: uart:unknown port:000002F8 irq:3 2: uart:unknown port:000003E8 irq:4 3: uart:unknown port:000002E8 irq:3 4: uart:16550A port:0000F080 irq:19 tx:34 rx:0 CTS|DSR|CD 5: uart:unknown port:00000000 irq:0 6: uart:unknown port:00000000 irq:0 7: uart:unknown port:00000000 irq:0 8: uart:unknown port:00000000 irq:0 ... //EDIT I was wo
Search Tutorials/Articles Search HCL Search Reviews Search ISOs Go to Page... LinuxQuestions.org > Forums > Linux Forums > Linux - Hardware cat /dev/ttyS0: Input/output error User Name Remember Me? Password Linux - Hardware This forum is for Hardware issues. Having trouble installing a piece of hardware? Want to know if that peripheral is compatible with Linux? Notices Welcome to LinuxQuestions.org, a friendly and active Linux Community. You are currently viewing LQ as a guest. By joining our community you will have the ability to post topics, receive our newsletter, use the advanced search, subscribe to threads and access many other special features. Registration is quick, simple and absolutely free. Join our community http://unix.stackexchange.com/questions/192075/cat-dev-ttys0-input-output-error today! Note that registered members see fewer ads, and ContentLink is completely disabled once you log in. Are you new to LinuxQuestions.org? Visit the following links: Site Howto | Site FAQ | Sitemap | Register Now If you have any problems with the registration process or your account login, please contact us. If you need to reset your password, click here. Having a problem logging in? Please visit this page to clear all LQ-related http://www.linuxquestions.org/questions/linux-hardware-18/cat-dev-ttys0-input-output-error-397212/ cookies. Introduction to Linux - A Hands on Guide This guide was created as an overview of the Linux Operating System, geared toward new users as an exploration tour and getting started guide, with exercises at the end of each chapter. For more advanced trainees it can be a desktop reference, and a collection of the base knowledge needed to proceed with system and network administration. This book contains many real life examples derived from the author's experience as a Linux system and network administrator, trainer and consultant. They hope these examples will help you to get a better understanding of the Linux system and that you feel encouraged to try out things on your own. Click Here to receive this Complete Guide absolutely free. Search this Thread 12-28-2005, 10:22 AM #1 lionking_x Member Registered: Aug 2003 Posts: 36 Rep: cat /dev/ttyS0: Input/output error I am trying to setup heartbeat for high-availibility between two SuSE SLES9 linux servers. I need serial communication between two hp-dl360 machines via the serial port. I use a null-modem cable to do this. The serial device on one of my systems gives me an error when i just do a simple cat /dev/ttyS0. The error is below , mymachine-p:~ # cat /dev/ttyS0 cat: /dev/ttyS0: Input/output error This happens on all the seria
1 #1 2013-04-05 14:35:39 Hexorg Member Registered: 2009-02-23 Posts: 27 [Solved] Using serial port (can't start communication) Hello everyone. I'm trying to connect to a switch through a built-in to motherboard serial port using minicom. I have arch running on vanilla kernel. `zgrep https://bbs.archlinux.org/viewtopic.php?id=160908 -i serial /proc/config.gz` tells me that CONFIG_SERIAL_8250=y, but `dmesg | grep tty` shows only tty0 active. I can't see anything serial port related with neither lspci, lshw, nor lsusb.I do have /dev/ttyS[0-3] but if I try to cat any of them it gives me input/output error. `setserial /dev/ttyS0` says "/dev/ttyS0, UART: unknown, Port: 0x03f8, IRQ: 4". Setting uart to 8250 with setserial did not help :-\I also tried starting agetty@ttyS0.service, no luck output error either.It seems like it *should* work out-of-box. But I can't communicate with the switch :-\Can someone please help me get the serial port working?TL;DR:-> Hardware serial port-> Vanilla kernel-> `dmesg | grep tty` shows only tty0-> `setserial /dev/ttyS0` says "/dev/ttyS0, UART: unknown, Port: 0x03f8, IRQ: 4"-> cat: /dev/ttyS0: Input/output error-> Minicom stays dark.-> Thanks for help! Last edited by Hexorg (2013-04-05 15:12:43) Offline #2 2013-04-05 15:12:08 Hexorg Member Registered: 2009-02-23 Posts: 27 ttys0 tcgetattr input Re: [Solved] Using serial port (can't start communication) Nevermind... Someone had serial port disabled in BIOS... Offline #3 2013-04-05 15:12:38 ewaller Administrator From: Pasadena, CA Registered: 2009-07-13 Posts: 13,471 Re: [Solved] Using serial port (can't start communication) It looks like your system is expecting the serial port to exist on the old ISA bus. Most modern architectures use a LPC (Low Pin Count) bus to provide ISA bus services. The kernel sets up the four legacy MSDOS COM: ports of 0x3f8, 0x2f8, 0x3e8 and 0x02e8 sharing iqq's 3 and 4 and maps them to /dev/ttyS[[0-3]; regardless of whether there is really hardware there.The question is: How is your serial port actually implemented? Do you know for certain that it is implemented as an legacy ISA device ? (Even though the hardware layer may be on the LPC bus?). If it is, is this a BIOS machine? Are the ports enabled in BIOS, mapped to the addresses the Linux kernel expects? Any chance the serial ports are implemented on a USB or PCI bus interface instead?Edit: Too slow.... At least I was on the right path Last edited by ewaller (2013-04-05 15:13:12) Nothing is too wonderful to be true, if it be consistent with the laws of nature -- Michael FaradayYou assume people are rational