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DateSun, 25 Nov 2007 18:24:07 +1030
FromDavid Newall <>
SubjectRe: 2.6.24: Serial disabled in BIOS but serial modules still loaded (probably PnP related)
Michael H. Warfield wrote:
> On Sat, 2007-11-24 at 23:36 +0300, Andrey Borzenkov wrote:
> 
>> I have no COM port on notebook (without port replicator which I do not have)
>> so COM is disabled in BIOS. No ttyS* is detected during boot (and no device
>> created) but I just noticed that serial modules are still loaded. Well, this
>> partially defeats the purpose of disabling COM port - the intention was to
>> free resources by *not* loading unneeded modules ...
>> 
>
> 
>> This may have something to do with (ACPI) PnP which apparently believes COM is alive.
>> Notebook is Toshiba Portege 4000.
>> 
>
> 	Nice...  What's this then?
>
> 
>> 00:09 PNP0501 16550A-compatible serial port
>>     state = active
>>         io 0x3f8-0x3ff
>>         irq 5
>> 

This doesn't mean that a port (ie connector) is present.  My notebook 
also has the electronics without the physical connector.
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