From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754490AbYJAUeS (ORCPT ); Wed, 1 Oct 2008 16:34:18 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1753124AbYJAUeJ (ORCPT ); Wed, 1 Oct 2008 16:34:09 -0400 Received: from gprs189-60.eurotel.cz ([160.218.189.60]:57149 "EHLO gprs189-60.eurotel.cz" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751767AbYJAUeI (ORCPT ); Wed, 1 Oct 2008 16:34:08 -0400 Date: Wed, 1 Oct 2008 22:33:46 +0200 From: Pavel Machek To: Jeremy Fitzhardinge Cc: Matthew Garrett , carbonated beverage , linux-kernel@vger.kernel.org Subject: Re: Thinkpad brightness keys kill X on 2.6.26.5 Message-ID: <20081001203346.GB1613@elf.ucw.cz> References: <20080925060244.GA18945@net-ronin.org> <20080930231952.GB15903@ucw.cz> <48E2CB5A.1050809@goop.org> <20081001095322.GA27987@srcf.ucam.org> <48E3C152.1000102@goop.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <48E3C152.1000102@goop.org> X-Warning: Reading this can be dangerous to your mental health. User-Agent: Mutt/1.5.18 (2008-05-17) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed 2008-10-01 11:28:34, Jeremy Fitzhardinge wrote: > Matthew Garrett wrote: >> On Tue, Sep 30, 2008 at 05:59:06PM -0700, Jeremy Fitzhardinge wrote: >> >> >>> On my shiny new X200 running Fedora Rawhide, I'm finding that the >>> brightness control keys work OK, but the backlight remains stuck off >>> after a resume. The machine is working fine but the backlight is >>> just off; I can see the display under a bright light. Switching >>> consoles and poking about in /sys/class/backlight/acpi_video?/ didn't >>> help. >>> >> >> Intel graphics, right? > > Yes. The new, erm , X4500? > >> The DRM layer should handle full resume on modern Intel hardware, but >> there's the potential for bugs. This is entirely unrelated to ACPI, >> though. >> > > OK, that's a good clue. I poke at acpi to change the brightness, so I'd > assumed that acpi would also handle turning the backlight on/off. > > I'm using the rawhide rather than standard kernel, but I'd thought they > were fairly similar. I believe vanilla and rawhide kernels are _very_ different in this area. On your config, s2ram -f -a 3 may be the right thing after all ;-). Pavel -- (english) http://www.livejournal.com/~pavelmachek (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html