iBook2 doesn't resume properly after sleep

[Xesc Arbona <xesc@bulma.net>]

Hi,

I have a problem with an iBook2rev2 (750FX). When I try to resume it
after a sleep, all seems to be ok, when the X screen doesn't appear. It
resumes all the usb and airport stuff, but it doesn't go further and I
have to reboot the machine. I can't neither change to TTY1 nor do
anything.

Any ideas to solve it? I think causes could be pbbuttonsd or the kernel,
but I'm not sure.

Thank you for your attention.

Regards,

-- 
Xesc