On Fri, 18 Jan 2008 17:29:49 -0500 Stefan Monnier wrote: > So it seems that the problem might be somewhere in thinkpad-acpi. > I'm running a stock Debian 2.6.23-1-686 kernel (ThinkPad ACPI Extras > v0.16). > > Any idea what's wrong? It's radeonhd blocking the brightness change, this is known upstream, but not fixed yet.