From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from atrey.karlin.mff.cuni.cz ([195.113.26.193]:50259 "EHLO atrey.karlin.mff.cuni.cz" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750949AbbGAJva (ORCPT ); Wed, 1 Jul 2015 05:51:30 -0400 Date: Wed, 1 Jul 2015 11:51:27 +0200 From: Pavel Machek To: Ville =?iso-8859-1?Q?Syrj=E4l=E4?= Cc: Imre Deak , intel-gfx@lists.freedesktop.org, "Rafael J. Wysocki" , Ilya Tumaykin , Dirk Griesbach , Mikko Rapeli , Paul Bolle , Jani Nikula , Daniel Vetter , stable@vger.kernel.org Subject: Re: [PATCH] drm/i915: apply the PCI_D0/D3 hibernation workaround everywhere on pre GEN6 Message-ID: <20150701095127.GB7969@amd> References: <1435673207-23030-1-git-send-email-imre.deak@intel.com> <20150630172706.GA28262@amd> <20150701090207.GR5176@intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20150701090207.GR5176@intel.com> Sender: stable-owner@vger.kernel.org List-ID: > > > - Embedded panels have a well defined shutdown sequence. We don't > > > have > > > any good reason to not follow this, in fact for some panels the > > > subsequent reinitialization could be problematic in case of a hard > > > power-off. (Thanks to Jani for this info) > > > > Please cite concrete example. I have yet to see machine that would not > > power up on forced power down. In fact, I argue that such machine > > would be very broken, and that such machine does not exist. While we > > have these real machines broken: > > > > > + * Lenovo Thinkpad X301, X61s, X60, T60, X41 > > > + * Fujitsu FSC S7110 > > > + * Acer Aspire 1830T > > > > What makes you think that BIOS writers will do something different for > > Gen6+ hardware? X301 is not that old. > > Thinkpad X1 Carbon (IVB) is perfectly happy with the D3, so clearly > something changed for Lenovo at least. And most machines (old and new) > have no problems whatsoever with the D3. Well, one machine being happy does not matter that much... as going to D3 has no real benefits. > It might be interesting to see if hibernate even works in Windows > without some vendor driver on these machines. I don't have windows nearby.. Pavel -- (english) http://www.livejournal.com/~pavelmachek (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html