Re: Serial port problems in 2.3.19 [UPDATED]

Bradley Baetz (bbaetz@student.usyd.edu.au)
Tue, 12 Oct 1999 22:05:40 +1000

tytso@mit.edu wrote:
>
> Date: Mon, 11 Oct 1999 22:50:32 +1000 (EST)
> From: Bradley Baetz <bbaetz@uuscss.cs.usyd.edu.au>
>
> I recently upgraded from 2.2.12 to 2.3.19. Now my serial port doesn't work
> properly, unless I do an explicit
>
> setserial /dev/modem autoconfig
>
> What kind of UART do you have in your serial port? Can you tell me
> something about it? Is it built into motherboard, is it an ISA or PCI
> card, etc.?
16550A, built into the motherboard. I've only got ttyS0 and ttyS1. None
of the bios options I found seemed to affect this. (They were only io
Port/IRQ and enable/disable settings)
>
> setserial -a shows no difference after running the autoconfig command.
> This happens with both serial ports. Haven't tried a serial mouse yet,
> only my modem.
>
> What does setserial -a say?

setserial -a /dev/ttyS0:
/dev/ttyS0, Line 0, UART: 16550A, Port: 0x03f8, IRQ: 4
Baud_base: 115200, close_delay: 50, divisor: 0
closing_wait: 3000, closing_wait2: infinte
Flags: spd_normal skip_test

setserial -a /dev/ttyS1:
/dev/ttyS1, Line 1, UART: 16550A, Port: 0x02f8, IRQ: 3
Baud_base: 115200, close_delay: 50, divisor: 0
closing_wait: 3000, closing_wait2: infinte
Flags: spd_normal skip_test

It says this in both 2.2.13pre15 and 2.3.19, before and after the
setserial command.

2.3.19 was the first 2.3 kernel I've tried since 2.3.3 or so. (As I said
above, I only recently switched kernel series). I can try backing out
the serial changes that went in during 2.3.16 if you want, but I've got
an assignment due tommorrow, so I won't be able to until then.

>
> - Ted
Thanks.

Bradley

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