Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754144AbbBRTEA (ORCPT ); Wed, 18 Feb 2015 14:04:00 -0500 Received: from tschil.ethgen.ch ([5.9.7.51]:38599 "EHLO tschil.ethgen.ch" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753641AbbBRTD7 (ORCPT ); Wed, 18 Feb 2015 14:03:59 -0500 Date: Wed, 18 Feb 2015 20:03:51 +0100 From: Klaus Ethgen To: Jani Nikula , Imre Deak Cc: linux-kernel@vger.kernel.org, dri-devel , "intel-gfx@lists.freedesktop.org" Subject: Re: [KERNEL] Re: [KERNEL] Regression bug in drm/i915, Wrong assumption in commit e11aa36 breaks suspend on at least lenovo x61 Message-ID: <20150218190347.GA12689@ikki.ethgen.ch> MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; x-action=pgp-signed In-Reply-To: <1424276692.27236.1.camel@intel.com> <87mw4bw7o7.fsf@intel.com> OpenPGP: id=79D0B06F4E20AF1C; url=http://www.ethgen.ch/~klaus/79D0B06F4E20AF1C.txt; preference=signencrypt User-Agent: Mutt/1.5.23 (2014-03-12) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 3655 Lines: 89 -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA512 Hi, Am Mi den 18. Feb 2015 um 16:39 schrieb Jani Nikula: > On Tue, 17 Feb 2015, Klaus Ethgen wrote: > > After solving the conflicts, I applied the revert (see attachment) to > > v3.18.7. I think it should also apply to the current head. With that > > patch, suspend is working again on that version. > > > > However, I have not to deep knowledge of that subsystem, so please, > > someone who have, have a deeper look into it. I especially do not know > > if the lines in .../intel_pm.c are correct or better leaving them as > > they are in v3.18.7. > > > > I want to have it working on a version that I know is stable before > > asking to pull it to head. > > Hi Klaus, we fear this patch may hide the actual cause. That might be. But that might be a second step, to find the actual cause. I think first the patch that causes the problem should be fixed/reverted to have a working kernel and the next step would be to find the real cause. I would happily help to solve both. > Would be useful to get a better description of what happens, Ask.. English is not my mother thong and I am not that good in finding descriptions. ;-) > along with a dmesg with drm.debug=14 module parameter set. Oh, I would be happy to be able to provide that. But if you look at the first mail in this thread, I asked days before how to debug that cause. The problem is that it stops in the middle of the suspend right after switching of screen. There is no way to get it back working after that and so no dmesg. I have to hard switch off the laptop after that. > This might clutter the mailing list, would you mind filing a bug at > [1] and attach the info there? One another account to just fill one bug? Or is there a way to fill the bug without creating an account? I would really like to not create another account. I still have that many from systems that forced me to create an account for just one bug report. Am Mi den 18. Feb 2015 um 17:24 schrieb Imre Deak: > In addition to the above could you also try the following patch and > provide a dmesg log on the bugzilla ticket - at this point only to try > to narrow down the issue?: > [PATCH] Yes, I can do that. But can you tell me how to get dmesg output when the problem happened? After that the box is unusable and I have to hard switch off it. There is no way to get any dmesg output after the bug happened. Regards Klaus Ps. I can forward the first two messages that I posted on kernel ML. That should also be available online. - -- Klaus Ethgen http://www.ethgen.ch/ pub 4096R/4E20AF1C 2011-05-16 Klaus Ethgen Fingerprint: 85D4 CA42 952C 949B 1753 62B3 79D0 B06F 4E20 AF1C -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 iQGcBAEBCgAGBQJU5OIMAAoJEKZ8CrGAGfas/MUL/1EYB/BKzdXl2JKyktSqt/TF ojXfGKXF6RPYukwIU4+ACXUVGWyZ2llWetbNxrP48MBjBHvXfPLUG0FcxagtE8hH yw61xt3uhO6YPso4fBBZfaCeiU2A5sO3RDb5yQ9kKdpK1GkrCQoG1VsQRKDFZGdl 99dEXQ4mMFMv27HR22YKtVnqW+Iwzdifu3NcdVw7ioqfZrMlRJSPmJQpJ7avfqFO qQzTOv9tFC2G29j6K1J4IeDRd5uagE/IoMQWMF1hvDJlx9iSr6dHSbq/7hZ6aOKZ nVWJ8mF5VB8ReqwI6j+akP+SgShCSG1HqdBJ57/Z2ygDys1N4Yr2EzJ1Ee8qyYp/ ibjwTbCfNKR4Ugq95WY8Dhpr9nUXDB+0pyVYjLvUABkkguDchQeQdUkY50IUodVh 82QkGoATJx+CLY7o+xNRj0W8m/e/VuSMPiJwxwNgJbmipPgG0JhlptRCO5Go8VCA woyPNWdaiLriPIo19mr2NTK8BlV2pT2HD6D7ehlJ7Q== =CE8V -----END PGP SIGNATURE----- -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/