Re: [newbie] No serial port access on ThinkPad X21 Ultraba

[Mikkel L. Ellertson]

Dennis Myers wrote:
On Tuesday 06 July 2004 08:31 am, nut megger wrote:
Story: continued three month long serial device saga.
Problem: cannot use external modem on serial port on
ThinkPad X21 Ultrabay
Latest attempts (using Fedora Core 2, Mandrake 10.0,
Mandrake 9.1, SuSe 9.1):
1. BIOS: serial port enabled
dmesg | grep tty recognizes ttyS0 at I/O 0x3F8 (IRQ=4)
is a 16850A
minicom cannot see modem on ttyS0 (no error message,
no nothing, echo on)
2. BIOS: serial port moved to 2E8 IRQ3
dmesg | grep tty recognizes ttyS3 at I/O 0x2E8 (IRQ=3)
is a 16850A
minicom cannot see modem on ttyS3 (no error message,
no nothing, echo on)
Conclusion: still cannot use Linux to access external
modem on serial port of ThinkPad X21 UltraBay
Aside: I’m getting real good at loading different
Linux distributions from scratch (fedora core 2 is the
easiest and quickest)

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If I recall correctly IRQ 3 should be ttyS2.   ttyS0 is IRQ 1, ttyS1 is IRQ 2 
etc. HTH

No, ttyS0 is normaly IRQ4, ttyS1 is IRQ 3.  ttyS2 and ttyS3 are up in 
the air, depending on the hardware.  ttyS2 is sometimes 3, and ttyS3 is 
sometime 4.  On more flexable hardware, they may be 5 or 7.  Realy nice 
pardware gives you even more choice...

Mikkel
--
  Do not meddle in the affairs of dragons,
for you are crunchy and taste good with Ketchup!

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