Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753905Ab0L2WNy (ORCPT ); Wed, 29 Dec 2010 17:13:54 -0500 Received: from rcsinet10.oracle.com ([148.87.113.121]:34505 "EHLO rcsinet10.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753156Ab0L2WNu (ORCPT ); Wed, 29 Dec 2010 17:13:50 -0500 Date: Wed, 29 Dec 2010 14:12:53 -0800 From: Randy Dunlap To: Jesse Barnes Cc: Linus Torvalds , Randy Dunlap , Linux Kernel Mailing List , dri-devel@lists.freedesktop.org, Jeff Chua , Alex Riesen Subject: Re: Linux 2.6.37-rc8 (no fb) Message-Id: <20101229141253.5ff91e3e.randy.dunlap@oracle.com> In-Reply-To: <20101229121601.179983b7@jbarnes-desktop> References: <20101229102127.06c0e505.randy.dunlap@oracle.com> <20101229121601.179983b7@jbarnes-desktop> Organization: Oracle Linux Eng. X-Mailer: Sylpheed 2.7.1 (GTK+ 2.16.6; x86_64-unknown-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2422 Lines: 58 On Wed, 29 Dec 2010 12:16:01 -0800 Jesse Barnes wrote: > On Wed, 29 Dec 2010 11:40:04 -0800 > Linus Torvalds wrote: > > > On Wed, Dec 29, 2010 at 10:21 AM, Randy Dunlap wrote: > > > > > > The only significant difference that I can see in the kernel message log > > > is this: > > > > Hmm. I suspect that difference should have gone away with commit > > 92971021c6328 (Revert "drm: Don't try and disable an encoder that was > > never enabled"), but clearly that didn't fix your blank screen. > > > > Does reverting commit 448f53a1ede54eb854d036abf54573281412d650 > > ("drm/i915/bios: Reverse order of 100/120 Mhz SSC clocks") fix it for > > you? It does for some people.. > > > > Chris - why did that lvds_ssc_freq thing suddenly start mattering? Can > > we please just disable spread-spectrum entirely? Or perhaps only if we > > notice that it was enabled already? Or something? > > Randy, Jeff and Alex, does the below help at all? If so, it may be the > minimal fix we want for 2.6.37. > > diff --git a/drivers/gpu/drm/i915/intel_bios.c b/drivers/gpu/drm/i915/intel_bios > index 2b20786..d27d016 100644 > --- a/drivers/gpu/drm/i915/intel_bios.c > +++ b/drivers/gpu/drm/i915/intel_bios.c > @@ -263,6 +263,9 @@ parse_general_features(struct drm_i915_private *dev_priv, > dev_priv->int_tv_support = general->int_tv_support; > dev_priv->int_crt_support = general->int_crt_support; > dev_priv->lvds_use_ssc = general->enable_ssc; > + /* force disable until we can parse this correctly */ > + if (IS_GEN5(dev) || IS_GEN6(dev)) > + dev_priv->lvds_use_ssc = 0; > > if (dev_priv->lvds_use_ssc) { > if (IS_I85X(dev)) > > > -- Ugh, looks like I have confused things horribly. Sorry about this. 2.6.37-rc8 with no patches works for me. My original report was incorrect -- I was using -rc7 when I thought I was using -rc8. :( Regrets, --- ~Randy *** Remember to use Documentation/SubmitChecklist when testing your code *** desserts: http://www.xenotime.net/linux/recipes/ -- 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/