Tim Shepard writes:
> This weekend I finally figured out why the keyboard in my MacBook Pro
> stopped working between 3.4 and 3.5.
>
> When I turned on CONFIG_EXPERT it turned off CONFIG_HID_APPLE. There
> was no warning that selecting "Configure standard kernel features" will
> invisibly turn off needed things elsewhere in the configuration tree.
>
> Something needs to be fixed, but it's not obvious that any simple change
> will work without causing other troubles.
"diff" the before and after .config files. That's alerted me to unexpected
changes (not just "where did CONFIG_${foo} go?" but also "wtf is CONFIG_${bar}
doing there?") on numerous occasions.