Re: serial line

Riley Williams (rhw@bigfoot.com)
Wed, 14 Oct 1998 16:23:24 +0100 (GMT)


Hi there.

> I've just tried 2.1.125 after 2.0.36pre13.

> I have my mouse at ttyS0, nothing at ttyS1 and an internal modem at ttyS3.
> Though in 2.0.* they work fine, in 2.1.125 I cannnot open both ttyS1 and
> ttyS3, trying to open the second one I get Device or resource busy.
> (I didn't compile plug-n-pray, nor support for >4 serial lines.)

> Boot message is the same at the two kernels:

> Serial driver version 4.xx with no serial options enabled

> ttyS00 at 0x03f8 (irq = 4) is a 16550A
> ttyS01 at 0x02f8 (irq = 3) is a 16550A
> ttyS03 at 0x02e8 (irq = 3) is a 16550A

> (pci sis 486 main board, amd 5x86 133MHz processor)

You appear to have ttyS01 and TTYS03 on the same interrupts, which
isn't usually a good idea and probably is the reason for the problem.
I also note that the device names have changed - in the 2.0 series
kernels, they are ttyS1 and ttyS3 respectively - so if there's any
"setserial" commands in your startus scripts, they'll not work as
they're pointing to the wrong devices...

ALAN: Have those device names really changed between the 2.0 and 2.1
series kernels?

Best wishes from Riley.

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