From mboxrd@z Thu Jan 1 00:00:00 1970 From: David Newall Subject: Re: 2.6.24: Serial disabled in BIOS but serial modules still loaded (probably PnP related) Date: Sun, 25 Nov 2007 18:24:07 +1030 Message-ID: <47492A1F.4030106@davidnewall.com> References: <200711242336.43712.arvidjaar@mail.ru> <1195962922.5044.8.camel@canyon.wittsend.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <1195962922.5044.8.camel@canyon.wittsend.com> Sender: linux-serial-owner@vger.kernel.org To: mhw@WittsEnd.com Cc: Andrey Borzenkov , linux-serial@vger.kernel.org, linux-kernel@vger.kernel.org, linux-acpi@vger.kernel.org List-Id: linux-acpi@vger.kernel.org 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.