From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755535Ab2AUKfL (ORCPT ); Sat, 21 Jan 2012 05:35:11 -0500 Received: from lo.gmane.org ([80.91.229.12]:37667 "EHLO lo.gmane.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754040Ab2AUKfI (ORCPT ); Sat, 21 Jan 2012 05:35:08 -0500 X-Injected-Via-Gmane: http://gmane.org/ To: linux-kernel@vger.kernel.org From: Lubos Kolouch Subject: i915 wakes from suspend to RAM with blank screen after commit cd9dde44f47501394b9f0715b6a36a92aa74c0d0 Date: Sat, 21 Jan 2012 10:32:14 +0000 (UTC) Message-ID: Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-Complaints-To: usenet@dough.gmane.org X-Gmane-NNTP-Posting-Host: 188.122.213.132 User-Agent: Pan/0.135 (Tomorrow I'll Wake Up and Scald Myself with Tea; GIT 30dc37b master) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hello, After upgrading kernel from 3.1.5 to 3.2.0 the notebook cannot wake from suspend to RAM properly. The problem stays even with 3.3-rc1. It wakes, but the screen is blank and computer needs to be rebooted. When woken, computer is working otherwise (can ping it, ssh to it etc.) I git bisected it to commit cd9dde44f47501394b9f0715b6a36a92aa74c0d0 is the first bad commit commit cd9dde44f47501394b9f0715b6a36a92aa74c0d0 Author: Adam Jackson Date: Fri Oct 14 12:43:49 2011 -0400 drm/i915/dp: Fix the math in intel_dp_link_required The previous code was confused about units, which is pretty reasonable given that the units themselves are confusing. Signed-off-by: Adam Jackson Signed-off-by: Keith Packard :040000 040000 3c0a0f38fc6482a401340e03fa3fbd687d11eda4 294673b782b3ecc93540f46f7721d385bd30cfac M drivers Reproducible: Always Steps to Reproduce: 1. suspend to RAM 2. start the computer Actual Results: Screen is blank Expected Results: Screen should be normal as before suspend