From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jeremy Fitzhardinge Subject: Re: Freeze with 2.6.32.19 and xen-4.0.1rc5, acpi problems Date: Tue, 24 Aug 2010 01:49:34 -0700 Message-ID: <4C73879E.5020306@goop.org> References: <4C6FD90D.9080907@rocnet.de> <20100821140234.GX2804@reaktio.net> <4C704E75.2050200@rocnet.de> <4C722AC2.6080701@rocnet.de> <20100823110928.GE2804@reaktio.net> <20100823122918.GG2804@reaktio.net> <4C7379BB.3020007@rocnet.de> <20100824081607.GL2804@reaktio.net> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable Return-path: In-Reply-To: <20100824081607.GL2804@reaktio.net> List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Sender: xen-devel-bounces@lists.xensource.com Errors-To: xen-devel-bounces@lists.xensource.com To: =?ISO-8859-1?Q?Pasi_K=E4rkk=E4inen?= Cc: xen-devel@lists.xensource.com, Claus Rosenberger , Keir Fraser List-Id: xen-devel@lists.xenproject.org On 08/24/2010 01:16 AM, Pasi K=E4rkk=E4inen wrote: > On Tue, Aug 24, 2010 at 09:50:19AM +0200, Claus Rosenberger wrote: >>>>> 2.6.31.9 but thats not a pvops kernel. >>>>> >>>> Does someone have ideas why the system would silently lockup (freeze= ) >>>> without those "acpi=3Dht noapic noirqbalance" options?=20 >>>> >>>> Afaik this is an Intel DQ45CB motherboard, which has been used by ma= ny people/developers. >>>> >>> Oh, one more thing..=20 >>> >>> Claus: Please try those options separately, >>> to figure out which one of those is the important one. >>> >>> -- Pasi >>> >> >> I checked out these options, following result >> >> - acpi=3Dht noapic =3D> worked >> - noapic =3D> didn't work, disk errors while booting, no f= unctional system >> - acpi=3Dht apic=3Ddebug =3D> worked >> >> So it seems i definitly need the option acpi=3Dht or acpi=3Doff or som= ething like that. >> > Keir, Jeremy: Any idea why acpi=3Dht is needed to make Intel DQ45CB (Q4= 5 chipset) work? > > Without "acpi=3Dht" the system freezes randomly without any log/debug/s= erialconsole output.. At a random guess, there's something strange about the SCI interrupt.=20 When booting native, does "acpi" get irq 9 or something else? Is there a BIOS setting relating to SCI or ACPI interrupts? J