[lug] ttySx - ppp woes with cdpd modem

[D. Stimits]

I recall seeing something similar a very long time ago. I wish I could
remember the exact problem and solution; about all I remember is I
solved it with a setserial command to the port, that used the skip_test
option. If you know exactly what that port should be set to (check
current settings via setserial -a on the ttySx), try running setserial
on it to specify the minimum info you can, along with skip_test option.
A sample of minimum info would be the uart (probably uart 16550A), a
base address, and an irq. This might not help at all, but the setserial
command will be ignored at the next reboot anyway, so it won't hurt. If
your modem is PCI based, you can probably get more info on it via lspci
and /proc/pci.

"Ferdinand P. Schmid" wrote:
> 
> HI,
> Now that I have my ssh problems all cleaned up I am banging my head
> against another problem:
> 
> I would like to set up a wireless modem (DART 300 from Sierra wireless)
> with a linux PC via a serial port /dev/ttyS1.  The modem automatically
> signs on to the ISP and works fine in Windows.  Yet no matter how I
> twist and turn it I can't get it to work in Linux.
> If I manually connect the modem (using minicom) I can successfully log
> on to my ISP.  Then when I try to bring up my ppp interface by issuing
> the command:
> 
> /usr/sbin/pppd -d -detach /dev/ttyS1 19200 &
> 
> I get:
> sent [LCP ConfReq id=0x1 <asyncmap 0x0> <magic 0xfd238409> <pcomp>
> <accomp>]
> sent [LCP ConfReq id=0x1 <asyncmap 0x0> <magic 0xfd238409> <pcomp>
> <accomp>]
> sent [LCP ConfReq id=0x1 <asyncmap 0x0> <magic 0xfd238409> <pcomp>
> <accomp>]
> sent [LCP ConfReq id=0x1 <asyncmap 0x0> <magic 0xfd238409> <pcomp>
> <accomp>]
> sent [LCP ConfReq id=0x1 <asyncmap 0x0> <magic 0xfd238409> <pcomp>
> <accomp>]
> sent [LCP ConfReq id=0x1 <asyncmap 0x0> <magic 0xfd238409> <pcomp>
> <accomp>]
> sent [LCP ConfReq id=0x1 <asyncmap 0x0> <magic 0xfd238409> <pcomp>
> <accomp>]
> sent [LCP ConfReq id=0x1 <asyncmap 0x0> <magic 0xfd238409> <pcomp>
> <accomp>]
> sent [LCP ConfReq id=0x1 <asyncmap 0x0> <magic 0xfd238409> <pcomp>
> <accomp>]
> sent [LCP ConfReq id=0x1 <asyncmap 0x0> <magic 0xfd238409> <pcomp>
> <accomp>]
> LCP: timeout sending Config-Requests
> Connection terminated.
> Receive serial link is not 8-bit clean:
> Problem: all had bit 7 set to 0
> 
> If I specity my options file for ppp parameters then I get Exit2 without
> any further explanation.
> 
> The modem is fixed at 19200 baud serial communication speed and hardware
> flow control.
> 
> Any ideas anybody - what am I doing wrong or what am I missing?
> 
> Thanks,
> Ferdinand
> 
> --
> Ferdinand Schmid
> Architectural Energy Corporation
> http://www.archenergy.com
> (303) 444-4149
> 
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