From mboxrd@z Thu Jan 1 00:00:00 1970 From: Bastien ROUCARIES Subject: Re: [VT-d reboot problems] Re: [PATCH] x86 / reboot: Blacklist Dell OptiPlex 990 known to require PCI reboot Date: Tue, 14 Feb 2012 19:17:02 +0100 Message-ID: References: <201111160019.51303.rjw@sisk.pl> <201201091700.09318.roucaries.bastien@gmail.com> <20120116004110.GA21240@srcf.ucam.org> <4F1478B0.6080200@zytor.com> <20120131121513.GE32010@elte.hu> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: QUOTED-PRINTABLE Cc: Avi Kivity , Sheng Yang , KVM devel mailing list , LKML , Matthew Garrett , "Rafael J. Wysocki" , Thomas Gleixner , x86@kernel.org, "H. Peter Anvin" To: Ingo Molnar Return-path: In-Reply-To: <20120131121513.GE32010@elte.hu> Sender: linux-kernel-owner@vger.kernel.org List-Id: kvm.vger.kernel.org On Tue, Jan 31, 2012 at 1:15 PM, Ingo Molnar wrote: > > (added KVM folks to the Cc:) > > * Bastien ROUCARIES wrote: > >> Ping^2 >> >> Bastien >> On Mon, Jan 23, 2012 at 11:28 AM, Bastien ROUCARIES >> wrote: >> > On Mon, Jan 16, 2012 at 8:21 PM, H. Peter Anvin wr= ote: >> >> On 01/16/2012 03:27 AM, Bastien ROUCARIES wrote: >> >>>> >> >>>> Does it work if you disable VT-d in the firmware? If so, then a= dding it >> >>>> to the reboot method blacklist is the wrong fix - we need to fi= gure out >> >>>> why VT-d interferes with Dell's reboot code. >> >>> >> >>> Yes it work >> >>> >> >> >> >> This is particularly so since we are very close to having a full = Dell >> >> model catalogue in the kernel... >> > >> > Ping ? Do you need some dump ? testing ? > > So disabling VT-d in the BIOS fixes the reboot problem and > Matthew Garrett suggests we should figure out why and how VT-d > on this Dell box interferes with the reboot method. > > Thanks, > > =C2=A0 =C2=A0 =C2=A0 =C2=A0Ingo