From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757461Ab0IUWK7 (ORCPT ); Tue, 21 Sep 2010 18:10:59 -0400 Received: from rcsinet10.oracle.com ([148.87.113.121]:49030 "EHLO rcsinet10.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756351Ab0IUWK6 (ORCPT ); Tue, 21 Sep 2010 18:10:58 -0400 Date: Tue, 21 Sep 2010 15:10:33 -0700 From: Randy Dunlap To: Uwe Bonnes Cc: linux-kernel@vger.kernel.org Subject: Re: Any SYSRQ key to force mode switch to console mode when using KMS? Message-Id: <20100921151033.80e61747.randy.dunlap@oracle.com> In-Reply-To: <19601.1301.803816.92851@elektron.ikp.physik.tu-darmstadt.de> References: <19601.1301.803816.92851@elektron.ikp.physik.tu-darmstadt.de> Organization: Oracle Linux Eng. X-Mailer: Sylpheed 2.7.1 (GTK+ 2.16.6; x86_64-unknown-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, 15 Sep 2010 19:40:37 +0200 Uwe Bonnes wrote: > Hello, > > is there any SYSRQ key that forces the video system to console mode, > especially when using KMS and allows to work on. sysrq-v help message says: force-fb(V) = "Restore framebuffer console" > Since going to KMS on a Thinkpad R50 with ATI Radeon RV250 via going from > Opensuse-11.2 to Opensuse-11.3 I experience frequent situations where I am > left with a black screen, with only ALT-SYSREQ-C switching the screen back > on and hard reboot as only chance to escape that situation. > > Situations that result in a black screen are: > > * Going with the mouse over the NOSCRIPT buttom in firefox. Load goes up and > screen goes black after some seconds. xorg.log ends with "Backtrace", but no > backtrace output... > > * Calling pm-hibernate on a system that has hibernated before. First > pm-hibernate/wake-up-per power buttom sequence is successfull. > > Disabling KMS results in very slow "kaffeine" full screen output... > > pm-hibernate and firefox/noscript worked pre-KMS on opensuse-11.2. > > Some traces of other people hitting the NOSCRIPT xorg crash and others > hitting the black unresponsive screen with KMS on RV250 are > found on the net, but I didn't find a conclusive resolution. > > Opensuse default kernel and the recent Opensuse 2.6.36-rc3 kernel-of-the day > were tested with no difference > > Thanks > > PS: I only follow linux-kernel via gmane.org, so if you need fast feedback, > please CC me. --- ~Randy *** Remember to use Documentation/SubmitChecklist when testing your code ***