[ltp] External modem connection problem - COM2 not found

[Bradley W. Langhorst]

glevine@us.ibm.com wrote:
> 
> Wei Ye,
> 
> Misery likes company. I have the same problem on my 600E. I haven't found a
> way out yet. Anyone else?
> 
> *********************************
> Geoff Levine
> 
> "ye, wei" <yw@alabanza.net> on 07/21/2000 05:20:42 PM
> 
> Please respond to linux-thinkpad@www.bm-soft.com
> 
> To:   linux-thinkpad@www.bm-soft.com
> cc:
> Subject:  [ltp] External modem connection problem - COM2 not found
> 
> Hi -
> 
> I have a problem about COM2, when I tried to connect ISP with my
> external modem.
> I have a 600X laptop, and an USR external 56K modem. It runs very well
> under Windows,
> and the serial port is detected as COM2.
> 
> However when I enter Linux(Redhat6.1), I couldn't find COM2(/dev/ttyS1):
> 
> [yw@yw driver]$ cat /proc/tty/driver/serial
> serinfo:1.0 driver:4.27
> 0: uart:16550A port:3F8 irq:4 baud:9600 tx:3 rx:0
> 1: uart:unknown port:2F8 irq:3
> 2: uart:unknown port:3E8 irq:4
> 3: uart:unknown port:2E8 irq:3
> 4: uart:unknown port:1A0 irq:9
> ...
> [yw@yw driver]$
> 
> I tried a few different kernels, from 2.2.12 to 2.2.14, all of them have
> PPP built with and PNP enabled.
> During the boot session, PPP enable information is printed out.
> I tried to dial out with minicom, it doesn't work at all no matter what
> I try /dev/ttyS0 - /dev/ttyS3,
> /dev/modem, or /dev/cua*.
> 
> Contrast to the laptop, I have another desktop computer, the COM2 is
> ready very well.
> 
> Is there anyone know a way to fix this problem?
> 
> Thanks for advance!
> 
> --
> 
> Sincerely,
> 
> Wei Ye
> 
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It is possible that your stuff works under windows because you have set
up various deviced to share interrupts.  Since that's not supported (at
least in this case) under linux something does not work.  What you might
try is manually setting the IRQ of all the devices you need using the
dos mode ps2.exe utility and writing them down.  When booting watch for
the sections that tell you about detected com ports 
(use shift pg-up if it is going too fast)

good luck

brad
-- 
Bradley W. Langhorst
Scientific Programmer
Whitehead Institute - Center for Genome Research
email: bwlang@genome.wi.mit.edu
tel:   617-252-1918
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