Comment 8 for bug 771758

I have tried pretty much all combinations of the brcm80211, wl, and acer_wmi modules on my Lenovo IdeaPad U160 and here's what I've found. The brcm80211 module/driver doesn't work under any conditions.

If I boot normally, with the acer_wmi and wl modules loaded automatically, then wifi doesn't work because of rfkill but I can't unblock them until I "sudo modprobe -r acer_wmi". Then wifi works fine. If I blacklist acer_wmi, wifi doesn't work again because of rfkill, but this time I can't unblock it until I "sudo modprobe acer_wmi" and then remove it again with "sudo modprobe -r acer_wmi".

So it seems like the acer_wmi module is doing some sort of necessary initialization without which the wl module and rfkill can't work. Hope that helps track down the real bug.

In the meantime, what's "the right way" to do this dance of loading and unloading acer_wmi automatically at startup?