Dear kernel developers, I have a MacBookPro12,1 A1502 with a very annoying problem. Every time it boots, the screen stays black for about 90 seconds, and the keyboard is unresponsive for an additional 40 seconds. Both the internal keyboard and (if present) external USB keyboard are unresponsive. This is a big problem because I use LUKS full-disk encryption, and I can't put in the password without the keyboard working. On every boot, I get something like: starting version 232 A password is required to access the cryptroot volume: Enter passphrase for /dev/sda4: [ 13.697887] usb 2-3: device not accepting address 2, error -62 [ 24.790929] usb2-3: device not accepting address 3, error -62 [ 36.097301] usb2-3: device not accepting address 4, error -62 [ 47.403659] usb2-3: device not accepting address 5, error -62 [ 47.430395] usb2-port3: unable to enumerate USB device After the final error message, the keyboard starts working and I can input my password. The dmesg log contains an additional error, "xhci_hcd 0000:00:14.0: Timeout while waiting for setup device command", interspersed with the "device not accepting address" errors. Resetting the SMC and the NVRAM did not help. I am confident that this is a common problem because I have found various other users complaining about it: https://bbs.archlinux.org/viewtopic.php?pid=1613363#p1613363 https://bbs.archlinux.org/viewtopic.php?pid=1451053#p1451053 https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1668105 https://bugzilla.kernel.org/show_bug.cgi?id=115741 Mine is an older MacBook model that is not prohibitively expensive (about 400 USD). Do any of you think that you can fix this bug? If so, I would love to set up an identical model with an identical Arch Linux configuration to my own and send it to you to keep and debug. -Alex -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
