From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753495AbaCFVtM (ORCPT ); Thu, 6 Mar 2014 16:49:12 -0500 Received: from nm14-vm0.bullet.mail.bf1.yahoo.com ([98.139.213.164]:39358 "EHLO nm14-vm0.bullet.mail.bf1.yahoo.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751697AbaCFVtG (ORCPT ); Thu, 6 Mar 2014 16:49:06 -0500 X-Yahoo-Newman-Id: 516403.1817.bm@smtp206.mail.bf1.yahoo.com X-Yahoo-Newman-Property: ymail-3 X-YMail-OSG: mTMsJEcVM1kEqEJIiZ_X3eDqbAEcz.rRI5SZlnDH.vnTKUQ 3yIBOIAlpAAxOMGOUN9COwArrDQU9nLOu1ZuepJhRR6Hz0FZ5CCBgrTXNAQp IxGNes64BThZ2_iE.cj7BGvA8ByVFJdvrUc.2ejzloYrb7U1ejzlDoT7toMY FAkfS94Rf0G_zNl0k5fH_xnW.0CEpqen93kCrI4sCJZyzj8bAPCt60hqSdn3 TjzZgmUbbGNo3lixITm2Eu6ZfndXCyDmK4tcpVRE6bc2B54xlXcotUqNZGMe FKIREC1wvnFrzrQNKyeUhaFbjj6Sf7NRwQ2IRJOfIjSfKOE.mRBJuQvKVQh7 Efh8jQv5bmbE3u_6oOSMBUjH6RWDPZUyuPjaho2UP0ff9ba8VbfoCVWTylYQ xzNE_He9zUPdgCqGfY743o7FM2F9YjnJ8PD0tS6weRrG64sTPrdeD1AesGDi cK2uYLSmarkRypgNsyYlFkPn3seN6gBHw0XsJQ8wtGNhjdmv1J37miEpNf1I lMozgwklh.t1YTBQBpxr7u0_0.9NTJdlFRKFoZsAZRC90v2uY3QDUdVXxRFu xAOXIagVhglEtBKdIdH4adjTNvDjUu4nBMhY7huK4xZ2o5BKQaTOmqKj47Cx jp_ZHOYVonlObLjK4i.jYXIScyvTyxC.J0Y.NTBMmuVjGIG_ReXJUaA-- X-Yahoo-SMTP: u9r3j8eswBBsV5z1r5v0bR9cjPS77vatbJK.6sw- X-Rocket-Received: from [163.238.113.35] (draconicpenguin1@163.238.113.35 with plain [98.139.211.125]) by smtp206.mail.bf1.yahoo.com with SMTP; 06 Mar 2014 13:49:05 -0800 PST Message-ID: <5318ED51.4060400@yahoo.com> Date: Thu, 06 Mar 2014 16:49:05 -0500 From: Brian Wong User-Agent: Mozilla/5.0 (Windows NT 6.3; WOW64; rv:24.0) Gecko/20100101 Thunderbird/24.3.0 MIME-Version: 1.0 To: KY Srinivasan , linux-kernel@vger.kernel.org Subject: Re: Hyper-V Synthetic Video Frame Buffer Driver may distort top two lines of console References: <5318DD7A.2080706@yahoo.com> <5318E311.8000303@yahoo.com> In-Reply-To: <5318E311.8000303@yahoo.com> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 3/6/2014 4:05 PM, Brian Wong wrote: > On 3/6/2014 3:41 PM, Brian Wong wrote: >> I've identified another possible bug in the Hyper-V drivers: When the >> Hyper-V Synthetic Video Frame Buffer Driver is built into the kernel, >> and the VM is paused and continued, the top two lines of the console may >> become distorted. See the image at http://imgur.com/kIExFP3. >> >> Can someone look into it? > > Just to clarify, I can confirm this bug under both the patched Gentoo > 3.10.32 kernel and the vanilla 3.13.5 kernel (see the image at > http://imgur.com/mYUTzgt). Is the framebuffer somehow getting corrupted? > The problem also reproduces under Kali Linux with kernel 3.12.6, but only on virtual consoles that are not hosting a graphical X session. The problem does not appear in X. -- Brian Wong http://www.fierydragonlord.com