From mboxrd@z Thu Jan 1 00:00:00 1970 From: Ingo Molnar Subject: [VT-d reboot problems] Re: [PATCH] x86 / reboot: Blacklist Dell OptiPlex 990 known to require PCI reboot Date: Tue, 31 Jan 2012 13:15:13 +0100 Message-ID: <20120131121513.GE32010@elte.hu> References: <201111160019.51303.rjw@sisk.pl> <201201091700.09318.roucaries.bastien@gmail.com> <20120116004110.GA21240@srcf.ucam.org> <4F1478B0.6080200@zytor.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: LKML , Matthew Garrett , "Rafael J. Wysocki" , Thomas Gleixner , x86@kernel.org, "H. Peter Anvin" To: Bastien ROUCARIES , Avi Kivity , Sheng Yang , KVM devel mailing list Return-path: Content-Disposition: inline In-Reply-To: Sender: linux-kernel-owner@vger.kernel.org List-Id: kvm.vger.kernel.org (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 wrote: > >> On 01/16/2012 03:27 AM, Bastien ROUCARIES wrote: > >>>> > >>>> Does it work if you disable VT-d in the firmware? If so, then adding it > >>>> to the reboot method blacklist is the wrong fix - we need to figure 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, Ingo