Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757022Ab0LPUhK (ORCPT ); Thu, 16 Dec 2010 15:37:10 -0500 Received: from mga01.intel.com ([192.55.52.88]:52475 "EHLO mga01.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756267Ab0LPUhH (ORCPT ); Thu, 16 Dec 2010 15:37:07 -0500 Message-Id: <5b55a1$ivkrie@fmsmga002.fm.intel.com> X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.59,356,1288594800"; d="scan'208";a="637169230" Date: Thu, 16 Dec 2010 20:37:03 +0000 To: Domenico Andreoli , torvalds@linux-foundation.org Subject: Re: Linux 2.6.37-rc6 Cc: linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, alexdeucher@gmail.com, airlied@linux.ie In-Reply-To: <20101216173011.GA2689@vixen> References: <20101216173011.GA2689@vixen> From: Chris Wilson Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2263 Lines: 51 On Thu, 16 Dec 2010 18:30:11 +0100, Domenico Andreoli wrote: > Hi, > > On Wed, Dec 15, 2010 at 07:10:28PM -0800, ext Linus Torvalds wrote: > > > > Go forth and test. And please do remember to ping bugzilla (or > > developers) about any regressions you find, whether new or old. > > I have some problem with i945, display remains blank. I also tried > adding i915.modeset=0 but nothing changed. Machine is well alive and > responds to basic commands like Ctrl+Alt+F1 and Ctrl+Alt+Del but I have > not other machine to enter via network. If i915.modeset=0 doesn't restore the display then something is extremely fishy. Do you see any console output before the i915.ko is loaded? > [ 1.284262] [drm] Initialized drm 1.1.0 20060810 > [ 1.284334] i915 0000:00:02.0: PCI INT A -> GSI 16 (level, low) -> IRQ 16 > [ 1.485212] vgaarb: device changed decodes: PCI:0000:00:02.0,olddecodes=io+mem,decodes=io+mem:owns=io+mem > [ 1.485642] [drm] initialized overlay support > [ 2.526011] No connectors reported connected with modes > [ 2.526053] [drm] Cannot find any crtc or sizes - going 1024x768 The issue appears to be that no outputs are being detected. I presume that you have instead a VGA connected to the box and that the regression is in fact e7dbb2f2. If I'm guessing rightly: diff --git a/drivers/gpu/drm/i915/intel_crt.c b/drivers/gpu/drm/i915/intel_crt.c index 8df5743..14c276e 100644 --- a/drivers/gpu/drm/i915/intel_crt.c +++ b/drivers/gpu/drm/i915/intel_crt.c @@ -148,7 +148,9 @@ static void intel_crt_mode_set(struct drm_encoder *encoder, dpll_md & ~DPLL_MD_UDI_MULTIPLIER_MASK); } - adpa = ADPA_HOTPLUG_BITS; + adpa = 0; + if (INTEL_INFO(dev)->gen >= 4) + adpa |= ADPA_HOTPLUG_BITS; if (adjusted_mode->flags & DRM_MODE_FLAG_PHSYNC) adpa |= ADPA_HSYNC_ACTIVE_HIGH; if (adjusted_mode->flags & DRM_MODE_FLAG_PVSYNC) -- Chris Wilson, Intel Open Source Technology Centre -- 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/