serial port mystery

From: Bill McCormick (wpmccormick_at_sbcglobal.net)
Date: 04/04/05

  • Next message: Claude Jones: "enable Posix" 
    Date: Sun, 03 Apr 2005 18:00:39 -0500
To: Fedora Core <fedora-list@redhat.com>

    Sometime ago I upgraded to FC3 from RedHat 9 to, among other reasons,
    get my VScom PCI 2 port serial card working.

    (RedHat 9 required a kernel re-compile)

    Anyway FC3 made it work. The two ports have been working for sometime on
    /dev/ttyS4 & 5. Now, inexplicably (after a reboot test) the 2 ports
    insist on using /dev/ttyS14 & 15.

    I removed my rc.serial ...

    <reference>
    [root@billinux ~]# cat /tmp/rc.serial
    setserial /dev/ttyS4 port 0xeca8 autoconfig
    setserial /dev/ttyS5 port 0xec98 autoconfig
    </reference>

    ... and still they come up as ttyS14 & 15.

    Somehow, the kernel must be doing this. But how? ACPI? Where is the
    config?
    How might this have changed? yum?
    Can I still use a rc.serial?
    How can I get the ports permissions set to 666?

    <reference from: dmesg>
    ACPI: PCI interrupt 0000:00:04.0[A] -> GSI 25 (level, low) -> IRQ 177
    ttyS0 at I/O 0x3f8 (irq = 4) is a 16550A
    ttyS14 at I/O 0xeca8 (irq = 177) is a 16550A
    ttyS15 at I/O 0xec98 (irq = 177) is a 16550A
    ttyS0 at I/O 0x3f8 (irq = 4) is a 16550A
    </reference> 

    -- 
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