On Saturday 27 November 2004 2:02, Benjamin Herrenschmidt wrote: > On Fri, 2004-11-26 at 11:28 +0100, Christof Petig wrote: > > > 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. > > What machine model precisely ? If it's an iBook, only the very first one > had a mach64 based chip and indeed used atyfb-based brightness control, > that might have been broken...
It's a first generation iBook SE (Special Edition). The SE means that it came with a 6GB HD, more RAM, and a slightly faster CPU (366MHz), but it does have a Mach64. > > > 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? > > Some earlier models have PMU-controlled brightness, independently on the > video card... So I don't think it's an "early model" because it came out later than the fruit-colored iBooks (it's grey and white, not <color>-berry like the real first gen iBooks). > > Your mouse pointer might get some noisy spots on brightness change, ever > > noticed? I would blame the kernel first (since 2.4 works well). > > Ah ? Haven't noticed that ? what machine ? > > > > 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? > > You may be missing the atyfb kernel driver. So I've tried this using the stock Debian 2.6.8 and 2.6.9 PPC kernels with the same results. $ grep ATY /boot/config-2.6.9-powerpc CONFIG_FB_ATY128=y CONFIG_FB_ATY=y CONFIG_FB_ATY_CT=y CONFIG_FB_ATY_GX=y # CONFIG_FB_ATY_XL_INIT is not set It seems that the atyfb module is compiled in. Is there another way to check? Frank
