Comment 4 for bug 285815

I am seeing this same bug on my MacBook Pro 5,1 with Ubuntu 8.10 using the mactel-support ppa with all relevant packages from the PPA installed and kernel modules loaded. This includes the updated package of gnome-power-manager from the PPA, and the only way to fix the problem is to disable the 'Use ambient light to adjust LCD brightness' option in g-p-m. Perhaps the light sensor reading is not correct? I am familiar with linux kernel development and debugging (just not on the MacBook Pro - this is my first) am just not too sure where to start debugging this one - any ideas?