On Fri, 26 Nov 2004 11:28:55 +0100, "Christof Petig" said: > 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).
I have noticed it, acutally. I don't know what it means exactly, but it seems that some small set of pixels near the cursor is affected. These corrupted pixels then move around with the cursor as 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 Well, that's something. What is your hardware? I have an original iBook (actually, it's the 1.5 generation that came with a slightly faster CPU and a bigger HD). Frank
