Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751077AbcKEXoi (ORCPT ); Sat, 5 Nov 2016 19:44:38 -0400 Received: from eddie.linux-mips.org ([148.251.95.138]:58262 "EHLO cvs.linux-mips.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750708AbcKEXog (ORCPT ); Sat, 5 Nov 2016 19:44:36 -0400 Date: Sat, 5 Nov 2016 23:44:34 +0000 (GMT) From: "Maciej W. Rozycki" To: Peter Hurley cc: Nathan Zimmer , Sean Young , Linux kernel mailing list , "linux-serial@vger.kernel.org" , Greg Kroah-Hartman , Alan Cox , "Rafael J. Wysocki" Subject: Re: console issue since 3.6, console=ttyS1 hangs In-Reply-To: Message-ID: References: <20161024135235.GA29984@gofer.mess.org> <20161024214925.GA143272@stormcage.americas.sgi.com> <20161025204139.GA22268@gofer.mess.org> <20161027201916.GA7718@gofer.mess.org> <20161031202706.GA10263@gofer.mess.org> <20161102152951.GA107664@stormcage.americas.sgi.com> <20161104213348.GA30383@stormcage.americas.sgi.com> User-Agent: Alpine 2.20 (LFD 67 2015-01-07) MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 829 Lines: 19 On Fri, 4 Nov 2016, Peter Hurley wrote: > > These bios screens do not have any mention of PNP settings. > > I am getting output over the console (via ipmi) until the boot hangs. > > Yeah, probably the device actually decodes io address access anyway, > but in the disabled state probably has not routed IRQ. > > I have no idea how to help you with the bios, sorry. I'd look out for serial port, Super-I/O or COM1 port (which is how PC-DOS named the device some 35 years ago) settings rather than anything to do with PNP. Typically you'd be able to choose from a few classic combined I/O space address and IRQ assignments in addition to a `Disabled' setting. There might be a genuine BIOS bug there as well of course as serial ports seem to be less used these days and the issue may have escaped validation. Maciej