From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from e.frontend.um.mediaways.net (e.frontend.um.mediaways.net [62.53.231.247]) by ozlabs.org (Postfix) with SMTP id 3BBB12BDF2 for ; Fri, 26 Nov 2004 21:35:54 +1100 (EST) Message-ID: <41A70567.8050000@petig-baender.de> Date: Fri, 26 Nov 2004 11:28:55 +0100 From: Christof Petig MIME-Version: 1.0 To: Frank Murphy References: <200411232008.16854.murphyf+xfree86@f-m.fm> In-Reply-To: <200411232008.16854.murphyf+xfree86@f-m.fm> Content-Type: text/plain; charset=us-ascii; format=flowed Cc: linuxppc-dev@ozlabs.org, debian-x@lists.debian.org Subject: Re: G3 iBook LCD brightness in X under kernel 2.4.25 and 2.6.8 List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Frank Murphy schrieb: > I'm trying to migrate from a 2.4 to a 2.6 kernel, but I have one last problem > keeping me with 2.4.25. There's a problem with adjusting screen brightness > under X (4.3.0.dfsg.1-8). > > I'm running pbbuttonsd 0.6.6-2 with gtkpbbuttons 0.6.4-3 (which are tools that > enable the LCD to be dimmed and brightened with keyboard pressed). When I'm > running the Debian kernel-image 2.4.25-8 and I press the brightness up or > down keys, I get the on-screen indication from gtkpbbuttons and the LCD dims > or brightens as expected in both X and on the console. However, when I boot > into kernel-image 2.6.8-6 or 2.6.9-1 and press the brightness keys, I get the > on-screen indication in X, but the LCD doesn't change brightness. However, if > I switch to a VT with a console, the brightness changes to what I tried to > change it to. Also, pressing the brightness buttons works fine when I press > them while in the console. > > My video card is a Mach64, and I'm using the 'ati' driver for X. One guess I > have is that in 2.6, lots more things are built as kernel modules. I'd like > to try build any needed video stuff in, but I don't know what it could be. > Does anyone here have an idea what controls screen brightness in X? Your mouse pointer might get some noisy spots on brightness change, ever noticed? I would blame the kernel first (since 2.4 works well). > The reason this is important for me is that the LCD is not dimmed when I close > the lid for sleep, which kind of ruins the point of sleep. > > Does anyone have an idea of what else I need to do to get screen dimming to > work under X with Linux 2.6? Try to ask on the ppc-kernel list (CCed). I suspect that nobody has reimplemented power management for mach64 in 2.6. The fact that lid closing does not put the display to sleep keeps me locked in 2.4, too (though I experienced that 2.6 is way faster). I played with the thought of fixing it myself (like I plan to fix DRI DMA some time) but was unable to allocate ressources (and enough motivation) So take this as a "I have the problem, too" posting Christof