From mboxrd@z Thu Jan 1 00:00:00 1970 From: Robert Hancock Subject: Re: 2.6.24: Serial disabled in BIOS but serial modules still loaded (probably PnP related) Date: Sun, 25 Nov 2007 12:39:24 -0600 Message-ID: <4749C15C.6020805@shaw.ca> References: Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Return-path: Received: from idcmail-mo1so.shaw.ca ([24.71.223.10]:59163 "EHLO pd2mo1so.prod.shaw.ca" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753525AbXKYSj7 (ORCPT ); Sun, 25 Nov 2007 13:39:59 -0500 In-reply-to: Sender: linux-serial-owner@vger.kernel.org List-Id: linux-serial@vger.kernel.org To: Andrey Borzenkov Cc: linux-serial@vger.kernel.org, linux-kernel@vger.kernel.org, linux-acpi@vger.kernel.org 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. Probably a BIOS bug. It still lists the port in PnP data even though the hardware is disabled, so the kernel still tries to load the serial driver for it, which finds there's no port there. -- Robert Hancock Saskatoon, SK, Canada To email, remove "nospam" from hancockr@nospamshaw.ca Home Page: http://www.roberthancock.com/