Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S966317Ab3DQRtv (ORCPT ); Wed, 17 Apr 2013 13:49:51 -0400 Received: from mail-ia0-f169.google.com ([209.85.210.169]:42075 "EHLO mail-ia0-f169.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S966137Ab3DQRts (ORCPT ); Wed, 17 Apr 2013 13:49:48 -0400 Date: Wed, 17 Apr 2013 13:49:44 -0400 From: Josh Boyer To: Bjorn Helgaas Cc: Stephan von Krawczynski , richard -rw- weinberger , LKML , Greg KH , "linux-acpi@vger.kernel.org" , "Rafael J. Wysocki" Subject: Re: No serial since kernel 3.8 Message-ID: <20130417174944.GB5788@zod.gha.chartermi.net> References: <20130416162047.2f9b83fe.skraw@ithnet.com> <20130416145953.GA8184@zod.gha.chartermi.net> <20130416181432.a28e0465.skraw@ithnet.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.21 (2010-09-15) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2831 Lines: 72 On Wed, Apr 17, 2013 at 11:38:30AM -0600, Bjorn Helgaas wrote: >[+cc Rafael & linux-acpi] > >On Tue, Apr 16, 2013 at 10:14 AM, Stephan von Krawczynski > wrote: >> On Tue, 16 Apr 2013 10:59:53 -0400 >> Josh Boyer wrote: >> >>> On Tue, Apr 16, 2013 at 04:55:25PM +0200, richard -rw- weinberger wrote: >>> >On Tue, Apr 16, 2013 at 4:20 PM, Stephan von Krawczynski >>> > wrote: >>> >> Hello, >>> >> >>> >> can some kind soul please explain how I can get my serial port back under >>> >> kernel 3.8.X. Earlier kernels showed: >>> >> >>> >> Jan 10 13:57:18 mybox kernel: [ 0.712829] serial8250: ttyS0 at I/O 0x3f8 >>> >> (irq = 4) is a 16550A >>> >> >>> >> But 3.8.4: >>> >> >>> >> Mar 26 10:39:14 admin kernel: [ 0.603647] serial 00:0a: disabled >>> >> >>> >> Only kernel is replaced, no change in distro >>> >> Is there some kernel boot parameter needed now? >>> >> I tried 3.4.X and it works, even 3.7.X works... >>> > >>> >So, 3.8.3 worked and 3.8.4 introduced a regression? >>> >If so please confirm. >>> > >>> >CC'ing gregkh, just in case... >>> >>> We had a report of this in Fedora that was fixed with 3.8.7. An upstream >>> change had been brought back to the 3.8.x series, and it was subsequently >>> reverted. 3.8.7 picked up the revert. >>> >>> josh >> >> 3.8.7 does not work either. I just checked it. I tried shared and not shared IRQ: >> >> Apr 16 17:47:05 mybox kernel: [ 0.604826] Serial: 8250/16550 driver, 8 ports, IRQ sharing disabled >> >> and another test: >> >> Apr 16 18:07:08 mybox kernel: [ 0.601203] Serial: 8250/16550 driver, 8 ports, IRQ sharing enabled >> >> I must say that 3.8.7 does not even tell the "serial 00:0a: disabled" any more. >> This is no special board, it is a pretty mainstream asus xeon board with onboard serial. >> Loading 3.4.24 (just an example) makes the port work immediately. >> Anything else I can test? > >3.7.6 works, and 3.8.3, 3.8.4, 3.8.7 all fail. So it looks like a >regression between 3.7.6 and 3.8.3. > >The "serial 00:0a: disabled" message is from PNP, so I added Rafael >and linux-acpi. Complete dmesg logs from 3.7.6 and 3.8.4 would be a >place to start. Also maybe an acpidump, since the 00:0a PNP device >probably came from PNPACPI. You could attach all these to a >https://bugzilla.kernel.org report if you want a place to stash them. > >Josh, do you have a pointer (URL) to the Fedora issue so we can rule >that in or out? https://lkml.org/lkml/2013/4/2/426 is the upstream thread. Seems that was narrowed down to 3.8.4 though, not 3.8.3. josh -- 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/