I've been using a good old powerbook (g3, bronze keyboard) with Debian Linux for years now. Woody (3.1) was still hard to install because of keyboard issues. Etch (4.0) and Lenny (5.0) were very easy to install and use.
I recently tried Debian squeeze (6.0) which works fine if I don't install any xorg / window manager components (text console only). Once the machine tries to load X, I run into trouble, likely with the graphics card driver, and the machine hangs with just a thin, horizontal line of garbage approx. 3/4 down the screen. Jumping to the text consoles (F1...F6) is no option, the only thing that works at this point is the the power button for shutting it down.
I've fixed a similar problem with "vga=791" in the grub boot options on i386 notebooks, but what do I do about this on the PowerBook?