Odd, I've been running every precise kernel for a while now on a MacBook Air 4,1 without ever seeing issues with the keyboard.
Please try the following when the keyboard is not working, using an external keyboard. Install the input-utils package, then run 'sudo lsinput' and look for the one that has a name similar to "Apple Inc. Apple Internal Keyboard." If the device is not there, attach the output from lsmod, lsusb -v, and dmesg. If the hid_apple module isn't loaded, try loading it and see if the keyboard works and what sort of output is produced in dmesg. If the input device does show up in lsinput, run 'sudo input-events <n>' where <n> is the input device number for the keyboard. Then push some keys on the built-in keyboard and see if input-events produces any output. It's probably worthwhile to attach dmesg in this case too and to look check it for any errors related to hid_apple. ** Changed in: linux (Ubuntu) Status: Confirmed => Incomplete -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/903655 Title: Macbook Air 4,1 keyboard unusable after upgrading to Precise To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/903655/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs