[expert] Modem Busy? IRQ conflict?

[Riley, Patrick (Patrick)** CTR **]

Hi everyone, I'm about ready to explode because I can't get this problem
figured out.  I just recently switched to Mandrake 7.1 from Redhat 6.2 and
I'm 


trying to dial through KPPP and I keep getting "modem is busy".  I also try
to go dial out through other things (minicom, and so on) and I get pretty
much the same response.  I had this modem working fine under Redhat by just
adding the "setserial /dev/ttyS0 port 0xdc00 irq 5" line but now it won't
work with 


Mandrake.  What could have changed?  Is something conflicting with my modem
(by the way, it is NOT a winmodem)? It's a US Robotics 56k Model 


2977.  I've copied some of my system info below if it might help.  I would
appreciate any help that anyone could give on how I might get this working.



Thanks.
My machine is a Athlon 650, 128Mb RAM, Abit Ka7 if it helps.

***********************
less /proc/interrupts

           CPU0
  0:     193956          XT-PIC  timer
  1:       1735          XT-PIC  keyboard
  2:          0          XT-PIC  cascade
  5:         12          XT-PIC  usb-uhci, usb-uhci
  8:          1          XT-PIC  rtc
 10:     361084          XT-PIC  emu10k1
 11:          0          XT-PIC  eth0
 12:      79640          XT-PIC  PS/2 Mouse
 13:          1          XT-PIC  fpu
 14:       6561          XT-PIC  ide0
 15:          5          XT-PIC  ide1
NMI:          0

******************

lspci -v

00:08.0 Serial controller: US Robotics/3Com 56K FaxModem Model 5610 (rev 01)
(prog-if 02 [16550])
        Subsystem: US Robotics/3Com USR-56k Internal FAX Modem (Model 2977)
        Flags: medium devsel, IRQ 5
        I/O ports at dc00
        Capabilities: [dc] Power Management version 2
        
******************

less /proc/pci

PCI devices found:
  Bus  0, device   0, function  0:
    Host bridge: VIA Technologies VT 8371 [KX133] (rev 2).
      Medium devsel.  Master Capable.  No bursts.
      Prefetchable 32 bit memory at 0xd0000000 [0xd0000008].
  Bus  0, device   1, function  0:
    PCI bridge: VIA Technologies VT 8371 PCI Bridge (rev 0).
      Medium devsel.  Master Capable.  No bursts.  Min Gnt=12.
  Bus  0, device   7, function  0:
    ISA bridge: VIA Technologies VT 82C686 Apollo Super (rev 34).
      Medium devsel.  Master Capable.  No bursts.
  Bus  0, device   7, function  1:
    IDE interface: VIA Technologies VT 82C586 Apollo IDE (rev 16).
      Medium devsel.  Fast back-to-back capable.  Master Capable.
Latency=32.
      I/O at 0xd000 [0xd001].
  Bus  0, device   7, function  2:
    USB Controller: VIA Technologies VT 82C586 Apollo USB (rev 16).
      Medium devsel.  IRQ 5.  Master Capable.  Latency=32.
      I/O at 0xd400 [0xd401].
  Bus  0, device   7, function  3:
    USB Controller: VIA Technologies VT 82C586 Apollo USB (rev 16).
      Medium devsel.  IRQ 5.  Master Capable.  Latency=32.
      I/O at 0xd800 [0xd801].
  Bus  0, device   7, function  4:
    Host bridge: VIA Technologies VT 82C686 Apollo Super ACPI (rev 48).
      Medium devsel.  Fast back-to-back capable.
  Bus  0, device   8, function  0:
    Serial controller: Unknown vendor Unknown device (rev 1).
      Vendor id=12b9. Device id=1008.
      Medium devsel.  IRQ 5.
      I/O at 0xdc00 [0xdc01].
  Bus  0, device  13, function  0:
    Ethernet controller: Winbond NE2000-PCI (rev 0).
      Medium devsel.  Fast back-to-back capable.  IRQ 11.
      I/O at 0xe000 [0xe001].
  Bus  0, device  17, function  0:
    Multimedia audio controller: Unknown vendor Unknown device (rev 8).
      Vendor id=1102. Device id=2.
      Medium devsel.  Fast back-to-back capable.  IRQ 10.  Master Capable.
Latency=32.  Min Gnt=2.Max Lat=20.
      I/O at 0xe400 [0xe401].
  Bus  0, device  17, function  1:
    Input device controller: Unknown vendor Unknown device (rev 8).
      Vendor id=1102. Device id=7002.
      Medium devsel.  Fast back-to-back capable.  Master Capable.
Latency=32.
      I/O at 0xe800 [0xe801].
  Bus  1, device   0, function  0:
    VGA compatible controller: NVidia Unknown device (rev 17).
      Vendor id=10de. Device id=2d.
      Medium devsel.  Fast back-to-back capable.  IRQ 10.  Master Capable.
Latency=32.  Min Gnt=5.Max Lat=1.
      Non-prefetchable 32 bit memory at 0xd4000000 [0xd4000000].
      Prefetchable 32 bit memory at 0xd6000000 [0xd6000008].

**********************

setserial /dev/ttyS0 port 0xdc00 irq 5

**********************

ls -l /dev/modem

lrwxrwxrwx  1 root    root    10 Sep 7 11:36 /dev/modem -> /dev/ttyS0

**********************

setserial /dev/ttyS0

/dev/ttyS0, UART: 16550A, Port: 0xdc00, IRQ: 5

**********************