Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S265025AbTFTXP1 (ORCPT ); Fri, 20 Jun 2003 19:15:27 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S265030AbTFTXP0 (ORCPT ); Fri, 20 Jun 2003 19:15:26 -0400 Received: from air-2.osdl.org ([65.172.181.6]:54975 "EHLO mail.osdl.org") by vger.kernel.org with ESMTP id S265025AbTFTXPG (ORCPT ); Fri, 20 Jun 2003 19:15:06 -0400 Subject: Re: 2.5.72: wall-clock time advancing too rapidly? From: Andy Pfiffer To: Andreas Haumer Cc: john stultz , "linux-kernel@vger.kernel.org" In-Reply-To: <3EF32223.6000207@xss.co.at> References: <1056039012.3879.5.camel@andyp.pdx.osdl.net> <1056058206.18644.532.camel@w-jstultz2.beaverton.ibm.com> <3EF32223.6000207@xss.co.at> Content-Type: text/plain Organization: Message-Id: <1056151705.1162.114.camel@andyp.pdx.osdl.net> Mime-Version: 1.0 X-Mailer: Ximian Evolution 1.2.4 Date: 20 Jun 2003 16:28:25 -0700 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2448 Lines: 78 On Fri, 2003-06-20 at 08:02, Andreas Haumer wrote: > john stultz wrote: > > On Thu, 2003-06-19 at 09:10, Andy Pfiffer wrote: > >>By "racing ahead rapidly", I mean this: > >> > >> % date ; sleep 60 ; date > >> Thu Jun 19 09:04:29 PDT 2003 > >> Thu Jun 19 09:05:29 PDT 2003 > >> % > >> > >>returns in 35 seconds (measured with my eyeballs and cheap wristwatch). > >> > > Well, variants on a theme. Can I get more hardware info? Is this a > > laptop? Are we running w/ Speed Step? > > > I had this symptom recently on an Asus PR-DLS533 mainboard > (ServerWorks GCLE chipset) with linux-2.4.21 and found out > it happens only if I had BIOS "USB legacy support" enabled. > As soon as I disabled this BIOS option, the phenomenon > disappeard. Update: 1) USB legacy support setting in the BIOS had no effect on the problem. 2) adding "clock=pit" (as suggested elsewhere) worked around the problem. So, does this fit the symptoms of: http://bugme.osdl.org/show_bug.cgi?id=827 The system is not a laptop, and SpeedStep related issues should not be messing things up here. % cat /proc/cpuinfo processor : 0 vendor_id : GenuineIntel cpu family : 6 model : 8 model name : Pentium III (Coppermine) stepping : 10 cpu MHz : 0.000 cache size : 256 KB fdiv_bug : no hlt_bug : no f00f_bug : no coma_bug : no fpu : yes fpu_exception : yes cpuid level : 2 wp : yes flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 mmx fxsr sse bogomips : 794.62 % lspci 00:00.0 Host bridge: ServerWorks CNB20LE Host Bridge (rev 06) 00:00.1 Host bridge: ServerWorks CNB20LE Host Bridge (rev 06) 00:01.0 VGA compatible controller: S3 Inc. Savage 4 (rev 04) 00:02.0 Ethernet controller: Intel Corp. 82557/8/9 [Ethernet Pro 100] (rev 08) 00:09.0 Ethernet controller: Intel Corp. 82557/8/9 [Ethernet Pro 100] (rev 08) 00:0f.0 ISA bridge: ServerWorks OSB4 South Bridge (rev 50) 00:0f.1 IDE interface: ServerWorks OSB4 IDE Controller 00:0f.2 USB Controller: ServerWorks OSB4/CSB5 OHCI USB Controller (rev 04) 01:03.0 SCSI storage controller: Adaptec AIC-7892P U160/m (rev 02) - 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/