Re: getting my serial ports back? ;-)

From: Alexander Koch (efraim@clues.de)
Date: Sat Jan 11 2003 - 07:52:08 EST


Hi Russel,

On Sat, 11 January 2003 09:44:35 +0000, Russell King wrote:
> Argh. What I suspect has happened here is:
>
> - the serial driver probed the ports tts/0 and tts/1 at I/O 0x3f8 and
> 0x2f8, and found two UARTS there. So it claimed IO resources at
> these addresses.
>
> (please show earlier messages in the boot log to confirm this.)

I have attached the dmesg from the 2.5.55 boot.

> - PNP came along, and noticed that 0x3f8 and 0x2f8 were used, so re-
> located the ports to 0x3e8 and 0x2e8, and told the serial driver
> about them.
>
> Since the serial driver knew there were ports at tts/0 and tts/1, it
> allocated tts/2 and tts/3 to the "PNP" ports.

>From reading that log explicitely, yes, PNP finds the same
ports again.

> A "get you working" fix should be to tell gpm.conf to use /dev/tts/2

Ah, this works, thanks lots!

> As for the -17 (EEXIST) error with devfs, I'd need to see the other
> serial messages earlier in the boot log to work out what's going on,
> as well as the kernel version the messages came from.

2.5.55 and 2.5.53 both have this and their log diffs not
at anything related to serial/pnp, etc.

Hope this helps a little for debug. If you need more
information please let me know.

Thanks lots,
Alexander



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