Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752342AbaFFW2J (ORCPT ); Fri, 6 Jun 2014 18:28:09 -0400 Received: from terminus.zytor.com ([198.137.202.10]:38651 "EHLO mail.zytor.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752092AbaFFW2H (ORCPT ); Fri, 6 Jun 2014 18:28:07 -0400 Message-ID: <53924070.3030209@zytor.com> Date: Fri, 06 Jun 2014 15:28:00 -0700 From: "H. Peter Anvin" User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:24.0) Gecko/20100101 Thunderbird/24.5.0 MIME-Version: 1.0 To: Tony Luck , Linux Kernel Mailing List Subject: Re: Garbage characters on serial console (Linus "next") References: In-Reply-To: X-Enigmail-Version: 1.6 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 06/06/2014 03:07 PM, Tony Luck wrote: > Pulled from Linus' "next" branch (HEAD = > 2b03adc1911d1c84cb7fad8b424234f589547cb3) > and built & booted on ia64. I see a lot of random characters on the > serial console. Suspiciously starting right after reporting the serial > line has been found. > > Here's what the output looks like when I "vi" the saved file: > > io scheduler noop registered^M > io scheduler deadline registered^M > io scheduler cfq registered (default)^M > pci_hotplug: PCI Hot Plug PCI Core version: 0.5^M > Serial: 8250/16550 driver, 4 ports, IRQ sharing enabled^M > 00:02: ttyS0 at I/O 0x3f8 (irq = 44, base_baud = 115200) is a 16550A^M > <80>^\þÇ^@üþ^\à^\<8c>àüðð^\<80><80>üðøþ<80>à<8e>^@üà^\àðÀ<80>^@<8e>à^@à<80><80>^\^\ÿ^\^@^\þþà^@à^\ðð^\<80><80>üþ<80>ü<80>þðøüà<8e>^\à<80>ð^@ÿ<80>üðà^@à<8e>ð<80><80><80><80>þðþ<80>üþ^\à^\^\<80>þÇü^\øà<8e>^@^\à^\^\^\ð<8e><80>ðà<8e><80>^\^@^@^\^\<8e><8e>^\àþþ^\<8e>^@^\<80>^@þ^\ÿ^\à<80>^@^\^\ø^\^\à^L^@<8e>ð^\<80>^\^\ü^\ø^\ÿ > > Output continues with alternating blocks of legible text and garbage. > System eventually boots (with a legible "login:" prompt). > Looks like the baud rate changed... -hpa -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/