From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S966845AbdKQW7g (ORCPT ); Fri, 17 Nov 2017 17:59:36 -0500 Received: from mx1.mailbox.org ([80.241.60.212]:48645 "EHLO mx1.mailbox.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S935287AbdKQW72 (ORCPT ); Fri, 17 Nov 2017 17:59:28 -0500 To: linux-kernel@vger.kernel.org From: Rainer Fiebig Subject: Re: Bug 103796 - 4.9.62: intermittent flicker after upgrade from 4.9.61 Message-ID: Date: Sat, 18 Nov 2017 00:00:26 +0100 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Yes, it's the i915-backports that cause the problem: - diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c     index 49de476..277a802 100644 - diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h     index a19ec06..3ce9ba3 100644 After reversing *both* (else the kernel won't compile) the flicker is gone, no more messages in dmesg. All else OK so far. Please do yourself and us users with older Intel CPU/GPU a favour and don't backport i915-stuff anymore for 4.9! It's risky and probably needless: until 4.9.60/61 everything was absolutely fine. Keep in mind that 4.4 is also unusable with those processors b/c of i915-problems (as you probably know). And I have a premonition now concerning 4.14. ;) -- The truth always turns out to be simpler than you thought. Richard Feynman