Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753624Ab0L2U6Z (ORCPT ); Wed, 29 Dec 2010 15:58:25 -0500 Received: from mirapoint3.brutele.be ([212.68.199.148]:40272 "EHLO mirapoint3.brutele.be" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753407Ab0L2U6W (ORCPT ); Wed, 29 Dec 2010 15:58:22 -0500 X-Greylist: delayed 368 seconds by postgrey-1.27 at vger.kernel.org; Wed, 29 Dec 2010 15:58:22 EST Message-ID: <4D1B9F53.4000004@tvcablenet.be> Date: Wed, 29 Dec 2010 21:51:31 +0100 From: =?ISO-8859-1?Q?Fran=E7ois_Valenduc?= User-Agent: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.2.13) Gecko/20101219 Lightning/1.0b3pre Thunderbird/3.1.7 MIME-Version: 1.0 Newsgroups: gmane.linux.kernel,gmane.comp.video.dri.devel 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) References: <20101229102127.06c0e505.randy.dunlap@oracle.com> <20101229121601.179983b7@jbarnes-desktop> In-Reply-To: <20101229121601.179983b7@jbarnes-desktop> Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 8bit X-Junkmail-Status: score=10/50, host=mirapoint3.brutele.be X-Junkmail-SD-Raw: score=unknown, refid=str=0001.0A0B020A.4D1B9F54.01C8,ss=1,fgs=0, ip=0.0.0.0, so=2010-06-24 23:00:37, dmn=2009-09-10 00:05:08, mode=single engine X-Junkmail-IWF: false Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2171 Lines: 49 Le 29/12/10 21:16, Jesse Barnes a ?crit : > 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)) > > I also encountered the black screen problem after commit 448f53a1. I can confirm that the above patch solves the problem. Fran?ois Valenduc -- 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/