From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752603Ab3KAOVU (ORCPT ); Fri, 1 Nov 2013 10:21:20 -0400 Received: from 8bytes.org ([85.214.48.195]:38403 "EHLO mail.8bytes.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751508Ab3KAOVT (ORCPT ); Fri, 1 Nov 2013 10:21:19 -0400 Date: Fri, 1 Nov 2013 15:21:15 +0100 From: Joerg Roedel To: Peter Senna Tschudin Cc: iommu@lists.linux-foundation.org, "linux-kernel@vger.kernel.org" , Thomas Gleixner , Ingo Molnar , "H. Peter Anvin" , x86@kernel.org, Seiji Aguchi , Konrad Rzeszutek Wilk Subject: Re: VT-d and x2apic: broken resume after suspend to ram Message-ID: <20131101142115.GK17455@8bytes.org> References: <20131101130702.GA3348@8bytes.org> 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) X-DSPAM-Result: Whitelisted X-DSPAM-Processed: Fri Nov 1 15:21:17 2013 X-DSPAM-Confidence: 0.9993 X-DSPAM-Probability: 0.0000 X-DSPAM-Signature: 5273b8dd20864815789901 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, Nov 01, 2013 at 02:21:07PM +0100, Peter Senna Tschudin wrote: > On Fri, Nov 1, 2013 at 2:07 PM, Joerg Roedel wrote: > > Which kernels have you tried? Does it happen with all of them or is > > there a kernel-version where this started? > > I'm using 3.11.6-200.fc19.x86_64. I always had VT-d enabled, and > suspend / resume never worked on Linux. I did not know that disabling > VT-d could be a workaround to the resume issue until yesterday. > > Does this have anything in common to: > https://bugzilla.redhat.com/show_bug.cgi?id=752613 This is probably not related. As far as I can see this issue was about boot problem with discrete graphics while your problem is related to suspend/resume. The next thing I would try on your machine is to get some kernel debug messages from resume. This might be hard to get, since your notebook has probably no serial port. But you can try to boot with no_console_suspend on the kernel cmdline and see if it gives you any output on resume. Maybe some of the VT-d guys can take a look too? Joerg