sio problems

[Stefan Lambrev]

Sven Esbjerg wrote:
> I have a Soltek MB with a Celeron CPU which I use for FreeBSD 7 testing.
> Recently I wanted to use the serial port to communicate with a gsm phone. To
> my suprise this did not work and odd errors were reported - like phone not
> connected when the phone could tell me there was a connection.
>
> [esbjerg at bishop]% uname -an
> FreeBSD bishop.xbsd.net 7.0-BETA2 FreeBSD 7.0-BETA2 #0: Sun Nov  4 15:17:28
> CET 2007     root at bishop.xbsd.net:/usr/obj/usr/src/sys/GENERIC  i386
>
> I looked at the boot messages and saw:
>
> sio0: configured irq 4 not in bitmap of probed irqs 0
> sio0: port may not be enabled
> sio0: configured irq 4 not in bitmap of probed irqs 0
> sio0: port may not be enabled
> sio0: <16550A-compatible COM port> port 0x3f8-0x3ff irq 4 flags 0x10 on acpi0
> sio0: type 16550A
> sio0: [FILTER]
> sio1: configured irq 3 not in bitmap of probed irqs 0
> sio1: port may not be enabled
> sio1: configured irq 3 not in bitmap of probed irqs 0
> sio1: port may not be enabled
> sio1: <16550A-compatible COM port> port 0x2f8-0x2ff irq 3 on acpi0
> sio1: type 16550A
> sio1: [FILTER]
>
> I google for a while but without much luck. 
> I have checked the BIOS settings which are irq 4 and 3F8 for port 1 and irq 3
> and 2F8 for port 2. This should be correct but still FreeBSD reports
> otherwise.
>
> I suspect this has something to do with acpi(?).
> Could anyone give me hints on how to debug and correct this problem?
>   
I do not know solution for your case, but as workaround you can try to 
remove device sio from kernel
and replace it by device uart. (or use modules)
Sometimes uart works better for me, but not aways :)

P.S. your serial will be then accessible through /dev/cuau[0-9]
> --
> Sven Esbjerg
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