SUSE 9.1 and serial port problem

Posted on 2004-11-24
Last Modified: 2013-12-15
I have installed SuSE 9.1 on a HP Netserver, and applied patches using on-line update.

I try to connect to a modem, but get no reply from modem. Have tried several types of serial devices, and my comm-package ("Modem is not ready") as well as minicom (no response).

Server is a rack, no keyboard or monitor when booting. I have tried exchanging the hardware, same result - must be OS-related.

From boot.msg:
<6>Serial: 8250/16550 driver $Revision: 1.90 $ 48 ports, IRQ sharing enabled
<4>ttyS0 at I/O 0x3f8 (irq = 4) is a 16550A

Boot logging started on /dev/tty1(/dev/console) at Wed Nov 24 15:25:31 2004

<notice>run boot scripts (setserial boot.proc)
Configuring serial ports...
/dev/ttyS0 at 0x03f8 (irq = 4) is a 16550A
Configured serial ports
done<notice>exit status of (setserial boot.proc) is (0 0)  

Using cat /proc/interrupts I get no lines with "serial", if I start the comm-program, I get:

         10          XT-PIC  serial

There seems to be no other leg-file entries related to this.

I have had the system running using same modem and software with an old SuSE 8, so I may be missing some banal change in SuSE 9.x

Question by:torstena
    LVL 38

    Expert Comment

    > I try to connect to a modem, but get no reply from modem
    So it is an external modem.
    What brand/model it is? Did you install driver install for it?
    I think you need to install the driver first.


    Author Comment

    Yes, I try to connect to an external modem.

    Or any serial devide for that matter. When my modem did not respond to "AT"-command I tried to connect to other devices (incl. a PC with terminal program). I simply cannot get anything out on the serial port. I should not need to worry about drivers until I can at least get simple communication of "AT" type functioning.


    Author Comment

    The problem have been resolved.

    The problem was caused by the default setting in the server BIOS of COM1 being a Management Port.

    SuSE 8.2 did not detect this, and therefore allowed the port to be used as a standard COM port.

    SuSE 9.x detects the special state of the port, and thus do not allow it to be used as a COM port. The setserial utility detects the port correctly but access is not allowed (no errormessages given). Once the port was set to standard serial port in the BIOS (press F2 wheen booting) it works.

    LVL 38

    Expert Comment


       Glad to know your problem resolved.
    You can ask for the points refund.


    LVL 2

    Accepted Solution

    Closed, 250 points refunded.
    Friendly Neighbourhood Community Support Admin

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