CentOS 5 Hardware :: NetMOS PCI 9835 Dual Serial Card - Can't Use The Serial Ports

Feb 21, 2009

On my CentOS 5.2 install I've installed a dual-port serial card based on the NetMOS 9835 chipset. I've followed the serial instructions, but everything they tell me to do is already done - see setserial outputs below. I've compared these values to the lspci output (below, NetMos card is at the bottom of the output) for the card and it appears right. Problem being, I can't use the serial ports. Oh and I did use search, and looked at every 9835-related article before posting this :)


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Ubuntu :: Serial MIDI - Doesn't See Any Serial Ports?

Jun 21, 2011

I have a bit of a dilemma. I'm attempting to use a microcontroller to send MIDI messages over a virtual serial port. I want to (eventually) read them with Mixxx. I'm using an FTDI chip, so I get a /dev/ttyUSB0. I've tried spikenzielabs' Serial-Midi program, but it doesn't see any serial ports. NOTEMIDI looks really old and won't compile on my 10.04 LTS machine.

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Hardware :: On PCI Serial Port Card I-440 Work Only Two Ports From 4?

Jan 16, 2010

Label on card: "I-440 PCI 4S1P IO Card"

# lspci -v


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CentOS 5 Hardware :: One Port Of Serial Card Can't Work

May 18, 2010

I add one serical card which is extended to 4 serial ports to my host, but in centos 5.4, only 3 (In my machine, is ttyS1, ttyS2 and ttyS3,ttyS0 is another serial port) of my host can be used, and /dev/ttyS4 doesn't work.

$ sudo cat /dev/ttyS4
cat: /dev/ttyS4: No such device or address

The card info is as follows:

Host> lspci -vvv
03:01.0 Serial controller: Oxford Semiconductor Ltd OX16PCI954 (Quad 16950 UART) function 0 (Uart) (prog-if 06 [16950])
Subsystem: AFAVLAB Technology Inc Unknown device 2150


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Hardware :: Serial Ports Through USB Hub

Oct 30, 2010

I need to talk to several serial ports. I was thinking of having a bunch of USB to serial cables and then plugging all of them into a USB hub, which goes to the computer. What I want to know is, will I see each serial port as a separate thing? With 1 USB to serial cable and no hub, I see /dev/ttyUSB0. With this hub, will I see /dev/ttyUSB0, /dev/ttyUSB1, etc?

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General :: Windows With Putty Via USB Serial Cable To Serial Port - Output Ok, Input Isn't?

Jan 13, 2010

I am trying to get two way serial communications going between a Windows XP system and a Linux system (RHEL 5).I have /sbin/agetty -L 9600 ttyS0

in /etc/inittab. I am using a generic USB to serial adaptor on Windows (Unitek) and a null modem cable. I have putty configured for 9600 baud, 8 bits, no parity, one stop bit, no flow control.I get the login prompt from agetty in the putty window but input does not work; I see weird characters in the putty screen. I can echo output into the device from windows and see it, but

cat < /dev/ttyS0. just prints out weird characters from what I type.

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Debian Hardware :: How To Get Old Serial-touchscreen To Work With USB / Serial Adapter

Oct 9, 2015

I am hoping to be able to get an old serial-touchscreen to work with a usb/serial adapter. I had this touchscreen working some years ago on different hardware. I would like to hook it to the machine I am setting up as a multimedia host with mythtv among other things.

Following the instructions I left behind when I got this to work way back when does not work. See [URL] ....

This info is a work around to get the xserver to see the touchscreen. [URL] ....

I do know that the touchscreen works as I am able to get garbage on the screen as in the first part of my howto. But I have not had any success getting xorg to see it. I wish I had posted a copy of the xorg.conf at the time, but......

There is an issue with the current xserver in testing that I am hoping the next update (in unstable) will fix when it gets pushed to testing. That is that Code: Select all# X -configure fails with a segfault. So I am not able to generate the xorg.conf needed to get it to work. I was going to post a bugreport, that is when I found out there is an update in unstable, so I am waiting for it to get pushed at the moment.

Anyway I am hoping that I can link /dev/ttyUSB0 to /dev/tty0 and get it to work. I would like some kind of guess as to my chances of success before I go to all the work of getting the monitor hooked to the host.

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Hardware :: OMAP4 Does Not Find USB Serial Ports?

Jul 27, 2010

I am setting up my OMAP4 board. I pluged power cable and USB port.But my OMAP4 blaze does not find ttyUSB*. I tried the same OMAP4 on other Linux machine and it is connecting to /dev/ttyUSB2. Do you know any thing I need to configure on my Linux

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Software :: Reading/Writing To Serial Ports (Rs-232)?

Dec 5, 2008

I am about to write a program to listen and read data from /dev/ttyS0 and write the data to /dev/ttyS1 after processing. Also, the same time I need to listen to /dev/ttyS1 and write to /dev/ttyS0 if any data arrived at /dev/ttyS1.

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Software :: Connect A Serial Cable To The Serial Port?

Mar 23, 2010

We have a new machine with RedHat enterprise 5 on it. I need to connect a serial cable to the serial port and talk to another system (old alpha system) instead of using a VT connected to the alpha.Does RedHat come with anything like Keaterm/hyperterm/etc etc?

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OpenSUSE Hardware :: Permissions For Accessing Serial Ports?

Feb 3, 2010

I am unable to access a serial port as normal user in OS 11.2. The ownership for the port,/dev/ttyS0 belongs to root:dialout. Group dialout has RW permissions.So,I guess the user has to belong to 'dialout' group.Even after a user is included in dialout port,still the user is unable to access,"Permission is Denied".

Before OS 11.2,I used to make the users members of group "uucp" to get serial port access.I tried that also in OS 11.2,without luck.So,I have to be root to access it. This requirement itself seems to be one of the fossils of old time Linux where for normal usage of PC resources,one needed elevated privileges.I guess the trend now is to let the user do all PC work,but in a safe way.

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Ubuntu :: Dump Serial Ports To Text Files With Timestamp?

Jun 1, 2010

I have a computer with 4 RS232 com-ports (MSI MS-9A19).

To each com-port, I have instruments attached that transmit data like this:


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Ubuntu Servers :: Serial Ports On Client Side Ltsp Setup?

Dec 12, 2010

I have recently installed an ltsp system, client and server. Everything works except i cannot get my client side serial ports to work or register for that matter. Can anyone point me to the steps i should take to get these working.

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Debian Hardware :: Setup A PCI To Serial Port Card?

Jan 13, 2010

I recently purchased a new PCI to Serial card to get 2 serial ports so I can connect my external serial modem and operate hylafax. The machine that I placed this card is a Debian 2.6.26-19lenny2 which is operating just fine. Further more the motherboard is ASUS P5QL-CM. I have managed to place the pci card on an available slot and powered on. I then tried to follow the instructions that the supplier of the card had regarding installation of drivers and this is what I get:

First they asked to untar the contents and make clean. the result is :

debiansrv:/temp/golden# make clean
cd driver;
make clean
make[1]: Entering directory `/temp/golden/driver'
rm -f *~
rm -f *.o


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Hardware :: PCI To Serial Quad 8-port Controller Card Chipset - ITE 8871 ?

Oct 14, 2010

I've just installed a multiport serial card. This is an 8 port serial-only card. The main chipset on it is an ITE IT8871F.

I've got questions : Is there a driver I should try force loading on it (and if so, what options to use)?

PCI to Serial Quad 8-port Controller Card
Chipset: ITE 8871


Ubuntu 10.10 Linux Server - Linux ubuntu 2.6.35-22-generic

lspci -vv show:

lshw show:

lspci -xxx show:

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CentOS 5 :: Using USB Port For Serial Terminal?

Apr 27, 2009

The /dev directory on my system shows the following entries:



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CentOS 5 Networking :: How To Ssh To The Serial Port On A PC

Jan 16, 2010

I would like to be able to ssh to a TCP port on my server and be directly connected to the serial port @ 115200 Null modem config. Does any body know how one can do this?

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CentOS 5 Server :: Serial Console Does Not Work?

Apr 16, 2009

I configured the serial consol on centos5 as follows

# dmesg |grep tty
Kernel command line: ro root=/dev/VolGroup00/LogVol00 console=tty0 console=ttyS0,9600n8
serial8250: ttyS0 at I/O 0x3f8 (irq = 4) is a 16550A
serial8250: ttyS1 at I/O 0x2f8 (irq = 3) is a 16550A[code]......

But I could not consol Centos server from my labtop (win xp) Is there missing or wrong configurations ?

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CentOS 5 :: Developing Using API - Get The Volume Serial Number?

Oct 29, 2009

how do i get the volume serial number using the API on CentOS?for example, on Microsoft Windows i use this function(API - Kernel32.dll):

BOOL GetVolumeInformation One of function's parameter is a pointer to a variable that receive the volume serial number;

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CentOS 5 :: Cannot Open Putty With USB To Serial Adapter

Aug 4, 2010

Im a very basic Linux/ Centos user. I have Putty installed and a USB to serial adapter. All settings seem to be right as far as speed, etc, but I'm not sure how to list the device to open for the program. The default location it gives is "/dev/ttyS0" Trying to find where the USB is located using the "/sbin/lsusb" command gives me-

Bus 001 Device 001: ID 0000:0000
Bus 002 Device 001: ID 0000:0000
Bus 003 Device 001: ID 0000:0000
Bus 004 Device 002: ID 0557:2008 ATEN International Co., Ltd UC-232A Serial Port [pl2303]
Bus 004 Device 001: ID 0000:0000

So I think this means that it is on bus 4 correct? So how do I list this for putty to open the device.

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CentOS 5 Hardware :: Serial Modem U.S Robotics Not Recognized?

Jan 20, 2009

on my server (fax server)with Cento O.S 5.2 final kernel 2.6.18-92.el5 the external serial modem 56k us robotic is not recognized.Kudzu not notes the modem.PS .On the same server ,same modem ,same serial but with Centos 4.5 ,this as regular detect.

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CentOS 5 :: Detecting And Mounting Serial Mouse/trackball?

May 7, 2009

I am attempting to use a serial trackball in CentOS 5.3 and have run out of ideas. The mouse is connected to COM2 (/dev/ttyS1). I have tried to configure it through xorg.conf using every protocol I could find including "auto" and tried the same again using "inputattach". The mouse communicates at 1200 baud, so I've tried using stty to set the port to that baud rate and still no luck. Is there a test tool that can be used to see if the serial connection is functioning? If not, are there any other ideas?

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CentOS 5 Hardware :: 5.5 - Does Currently Not Support Oxford's OXPCIe952-F Serial Controller Chip

Jan 27, 2011

Is it possible that CentOS 5.5 does currently not support Oxford's OXPCIe952-F serial controller chip? We've added one of those PCIe x1 cards to one of our servers since we need additional serial interfaces but it doesn't seem to work. Instead of three serial ports (the server comes with one already, the controller adds two more) we still only have ttyS0:


root/linux2$ zgrep ttyS /var/log/*
/var/log/dmesg:serial8250: ttyS0 at I/O 0x3f8 (irq = 4) is a 16550A
/var/log/dmesg:00:08: ttyS0 at I/O 0x3f8 (irq = 4) is a 16550A


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General :: Dual GPU Video Card Switches DVI Ports During Boot Up Sequence

Apr 23, 2011

I have an image generator (IG) running 64-bit Ubuntu Linux, GNOME & the SAGE application all running through an NVIDIA Quadra FX4500-X2 (dual GPU). Had to install a new FX4700-X2 (and the latest drivers) because 4500's are unavailable. The computer works fine except but I cannot watch the whole boot up sequence on the same DVI port anymore.On the 4500, all video came out the lower DVI port of the GPU with the PCI-X connector (let's call that the "a" GPU). But on the 4700 card, the screens you see during boot are divvied up between the lower DVI port of each GPU. The POST screen through Ubuntu splash screen comes out the "b" GPU while the "a" GPU is blank. The SAGE Initialization page and SAGE Desktop comes out the "a" GPU while the "b" GPU is blank.

I logged in as root and looked for a GNOME menu allowing me to force all video through the same GPU & DVI port, but couldn't find anything remotely close. Any suggestions on where I can look? Technically this IG is working, but I want to fix this to avoid future wild goose chases. The system uses 52 of these IG's.

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CentOS 5 Hardware :: Driver For Ich8 Serial Ata Storage Controller 2820 Driver

Feb 17, 2010

I am attempting to load CentOS 5 on an Acer 6900 desktop and I'm not even getting out of the starting gate. I am familiar with using linux but not the install procedure which is why I am beginning to dive into this. However, when I bring the system up off the Linux boot disk and go to install it's not even giving me the option of the controller so I can begin installing the os from the dvd-rom. This is what acer lists as the controller for the 6900: ich8 serial ata storage controller 2820 linux driver. I cannot find this driver for linux anywhere.

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Server :: Hdd Serial No

Apr 6, 2010

hi all,

How to find out server's HDD Serial no tried below command but didnt work,

#hdparm -I /dev/sda

so please help & Thanks in Advance.

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General :: Determine The Serial # Of The New Hdd?

Jan 20, 2010

I have cloned my linux OS onto a new hdd. Now even tho the system will boot, it directs me to the login screen and asks me to fix the location of the root dir because it is looking for /dev/disk/by-id with a very long serial #. I presume this is the old hdd serial #. How can I determine the serial # of the new hdd and change it in fstab? Is this the correct idea? Is it just......ls /dev/disk/by-id???

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General :: Serial Communication In Between VM And ESX?

Apr 28, 2010

I am in verse to understand the serial communication between guest and host.I have just added a serial port through VI Client selecting "Use serial port on host"(host being ESX host).If I am on VM and run :

ll > /dev/ttyS0

I understand that it should get displayed through ESX Host. So On ESX Host, I typed:

cat /dev/ttyS0

But nothing worked !

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Server :: Using Of SOA Serial Number?

Feb 19, 2011

Except faster reading of zone records there is not other purpose of correct SOA number,right?

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Fedora Servers :: Serial Port On Fed 12

Mar 25, 2010

Can anyone one give me some pointers please, for talking to a serial port, if I use cutecom it always returns "could not open /dev /tty0 or 1 or 3 or 4, even tried ttys0 etc

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