Groups > linux.kernel > #1502067

console issue since 3.6, console=ttyS1 hangs

From	Nathan Zimmer <nzimmer@sgi.com>
Newsgroups	linux.kernel
Subject	console issue since 3.6, console=ttyS1 hangs
Date	2016-10-17 17:00 +0200
Message-ID	<sthyp-4Nc-27@gated-at.bofh.it> (permalink)
Organization	linux.* mail to news gateway

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A cluster client recently tried to update from Sles11 to Sles12 and found in
some cases the boxes would hang in early boot.  It came down to console=ttyS1
on the command line.  After a bisection I found it happended in here:

commit 835d844d1a28efba81d5aca7385e24c29d3a6db2
Author: Sean Young <sean@mess.org>
Date:   Fri Sep 7 19:06:23 2012 +0100

    8250_pnp: do pnp probe before legacy probe


I found I can revert the part of the patch in 8250.c (now 8250_core.c) and
the hangs do not happen.

Bios of the offending box ( I don't know if there a bios update )
Version 2.15.1234. Copyright (C) 2012 American Megatrends, Inc.
BIOS Date: 02/05/2014 13:45:09
Ver: ma2e2054.16I

I don't have much more info but will collect anything that is asked.
Any help would be appeciated.

Nate

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console issue since 3.6, console=ttyS1 hangs Nathan Zimmer <nzimmer@sgi.com> - 2016-10-17 17:00 +0200
  Re: console issue since 3.6, console=ttyS1 hangs Sean Young <sean@mess.org> - 2016-10-17 17:20 +0200
    Re: console issue since 3.6, console=ttyS1 hangs Nathan Zimmer <nzimmer@sgi.com> - 2016-10-17 18:50 +0200
      Re: console issue since 3.6, console=ttyS1 hangs Nathan Zimmer <nzimmer@sgi.com> - 2016-10-18 18:50 +0200
        Re: console issue since 3.6, console=ttyS1 hangs Sean Young <sean@mess.org> - 2016-10-18 20:10 +0200
          Re: console issue since 3.6, console=ttyS1 hangs Sean Young <sean@mess.org> - 2016-10-19 17:10 +0200
            Re: console issue since 3.6, console=ttyS1 hangs Nathan Zimmer <nzimmer@sgi.com> - 2016-10-20 00:20 +0200
              Re: console issue since 3.6, console=ttyS1 hangs Sean Young <sean@mess.org> - 2016-10-20 22:20 +0200
                Re: console issue since 3.6, console=ttyS1 hangs Nathan Zimmer <nzimmer@sgi.com> - 2016-10-21 18:00 +0200
                Re: console issue since 3.6, console=ttyS1 hangs Sean Young <sean@mess.org> - 2016-10-24 16:00 +0200
                Re: console issue since 3.6, console=ttyS1 hangs Sean Young <sean@mess.org> - 2016-10-25 22:50 +0200
                Re: console issue since 3.6, console=ttyS1 hangs Nathan Zimmer <nzimmer@sgi.com> - 2016-10-26 20:20 +0200

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