Serial Port Bug?

Karl Larsen k5di at
Tue Nov 27 23:37:25 UTC 2007

Tom Horsley wrote:
> On Tue, 27 Nov 2007 08:48:21 -0700
> Karl Larsen <k5di at> wrote:
>> This made me think the new 
>> computer which has a serial port that is not working.
> I could certainly be a busted serial port, but there are
> billions of other possibilities as well (unfortunately :-).
    Now I am sure it is there but not working it seems. I read the 
proper voltages on the pins of the serial port, and the dmesg does find 
a serial driver on the computer.

> Did you install Xen on the system and are you running the
> Xen kernel? I know that Xen likes to steal the serial port
> even from the Dom0 for use as a console in the xen
> microkernel.
    No Xen here.

> There could also be udev permission problems (though you
> probably would have still seen something about ttyS* in
> dmesg in that case). You might have to add your user to
> group "uucp" to access the serial port.
    Yes I did that months ago and it is still good.
> If you have any of the various livecd distributions around,
> you might try booting them to see if they can see a serial
> port.
    I will try my umbuntu cd later and see if it can use the the port.

    I need to find anything else that uses the serial port.



	Karl F. Larsen, AKA K5DI
	Linux User

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