Comment 51 for bug 776999

Can you still change the brightness after going with a 32b installation, or using the "noapic" parameter?

I reinstalled with precise 32bits and it doesn't freeze anymore, but the brightness control doesn't work either. The indicator shows up in the right top corner and the slider moves about, but the actual brightness doesn't change.

I'll try rebooting with acpi_backlight=vendor later.