From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753351Ab2DRNT4 (ORCPT ); Wed, 18 Apr 2012 09:19:56 -0400 Received: from cantor2.suse.de ([195.135.220.15]:34417 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751456Ab2DRNTy (ORCPT ); Wed, 18 Apr 2012 09:19:54 -0400 Date: Wed, 18 Apr 2012 15:19:53 +0200 Message-ID: From: Takashi Iwai To: Alex Deucher Cc: David Airlie , dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org Subject: Re: [REGRESSION] 3.4-rc* radeon: No DVI-A output after commit e00e8b5e760cb In-Reply-To: References: User-Agent: Wanderlust/2.15.6 (Almost Unreal) SEMI/1.14.6 (Maruoka) FLIM/1.14.9 (=?UTF-8?B?R29qxY0=?=) APEL/10.7 Emacs/23.3 (x86_64-suse-linux-gnu) MULE/6.0 (HANACHIRUSATO) MIME-Version: 1.0 (generated by SEMI 1.14.6 - "Maruoka") Content-Type: text/plain; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org At Wed, 18 Apr 2012 14:39:54 +0200, Takashi Iwai wrote: > > Hi, > > I noticed that one machine here gives only the blank output with > 3.4-rc's. The bisection lead me to affecting commit: > > commit e00e8b5e760cbbe9067daeae5454d67c44c8d035 > Author: Alex Deucher > Date: Fri Mar 16 12:22:09 2012 -0400 > > drm/radeon/kms: fix analog load detection on DVI-I connectors > > Reverting this commit helped, it goes back to normal. > > On this system, the VGA monitor is connected to DVI over a VGA-DVI > connector (and even VGA-switcher). So, yeah, it's a strange setup. > But a regression is a regression. Looking at the commit again, it appears like a simple logic failure. It should be "&&" instead of "||". Takashi