From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752245AbcGSEva (ORCPT ); Tue, 19 Jul 2016 00:51:30 -0400 Received: from smtp-out3.iol.cz ([194.228.2.91]:51394 "EHLO smtp-out3.iol.cz" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751953AbcGSEv1 (ORCPT ); Tue, 19 Jul 2016 00:51:27 -0400 Subject: Re: Kernel stability on baytrail machines To: Pavel Machek Cc: Ezequiel Garcia , One Thousand Gnomes , linux-kernel@vger.kernel.org, linux-pm@vger.kernel.org, dri-devel@lists.freedesktop.org, intel-gfx@lists.freedesktop.org References: <606d9b223f3c12775d108b98c4df72ae@feix.cz> <20160409160119.GA19362@xo-6d-61-c0.localdomain> <20160409201417.4436d4bd@lxorguk.ukuu.org.uk> <20160712194158.GA4834@laptop> <20160712212448.GA19237@amd> <864e7ac7-8041-9a81-819c-d6b60b59dd0f@feix.cz> <20160713104802.GA18296@atrey.karlin.mff.cuni.cz> From: Michal Feix Message-ID: <7f521bff-0fbf-a2f4-e779-c9bc40c7cd84@feix.cz> Date: Tue, 19 Jul 2016 06:51:17 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Thunderbird/45.2.0 MIME-Version: 1.0 In-Reply-To: <20160713104802.GA18296@atrey.karlin.mff.cuni.cz> Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Dne 13.7.2016 v 12:48 Pavel Machek napsal(a) >>>> Are there any updates on the status of this issue? >>>> >>>> The current bugzilla report [1] marks this as a power management >>>> issue. However, many reports indicate that it would only freeze >>>> when running X, so it's not completely clear if it's related to >>>> the gfx driver too. >>> Does >>> >>> "intel_idle.max_cstate=1" >>> >>> fix it for you? >> Yes, it does. >>> If you feel it is X-only problem, you may want to provide details >>> about your graphics subsystem (DRM enabled? framebuffer only?) and >>> probably cc. >> It's not X-only problem. Happens even in console mode, which is KMS >> switched during boot though. >>> ...actually... you may want to verify if it happens in unaccelerated X. >> As it happens even in console mode, is this relevant test? > No, no need to test with X. > > Would it be possible to test in good old VGA mode? For past few days I updated to 4.6.3 kernel and tested with X and without X, in console mode and no KMS. My machine is way more stable than with previous 4.5.* and 4.4.* kernels I tried. With 4.6.3 kernel and X running, I had only one freeze during Firefox session with video playback. For the rest of two days of testing, no hang. I was not able to hang the machine during another 2 days of testing with 4.6.3 kernel and console mode with KMS disabled. It's fair to say, that stress testing of GFX is quite limited when running in console mode :-). I tried hard with mplayer with libcaca and with repeated kernel compilation task. No hang occured. My conclussion is that 4.6.3 is surelly a huge improvement, compared to 4.5 and 4.4. kernels regarding Bay trail stability issue. Michal Feix