RE: [TCLUG:1164] kernel won't detect serial port

["Schlough, Mark" <Mark.Schlough@nmb.norwest.com>]

> -----Original Message-----
> From:	Sanjay Chawla [SMTP:chawla@s1.arc.umn.edu]
> Sent:	Monday, September 14, 1998 10:31 AM
> To:	tclug-list@listserv.real-time.com
> Subject:	[TCLUG:1164] kernel won't detect serial port
> 
> Hi,
> 	I recently installed  RedHat Linux 4.2 on a separate
> hard drive on my Pentium 90 machine.
> 
> 	After I installed Linux and before I configured the
> PPP connection using "netcfg", I installed a new 
> 56k Zoom Fax/Modem(UART 16550).  On hindsight this was a mistake 
> becuase I should have first checked the internet connection using the 
> old modem!
> 
> 	I had problems installing the Zoom modem even on Windows
> but the tech. support at the company walked me through it and
> now the modem is installed on COM3 with IRQ=10.
> 
> 	The problem is now Linux does not detect the port 
> when it  boots. The kernel only detects tty0 and tty1.  I tried
> to recompile the kernel(2.0.30)  but that did not help.
> 
> 	I have read through the serial-HOWTO and PPP-HOWTO but
> I have not made any progress. 
> 
> 	When I use the setserial command:
> 
> setserial /dev/cua2 or /dev/ttyS2,
> 
> the UART attribute is returned as "unknown". 
> 
> 	Can anybody please suggest a solution. 
	[Schlough, Mark]  
	You may want to try 
	"cat /proc/interrupts " and "cat /proc/ioports" 
	This should tell you which ports are being used, and are recognized
by Linux.

	Do you have a symlink from /dev/modem to /dev/cua2 (assuming COM3)
if you don't I suggest you do that too.

	Hope this helps you on your way.

	Mark Schlough


> Thanks,
> 
> Sanjay 
> 
> 
> 
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