Comment 26 for bug 1668105

Get exactly the same as described here on a Macbook Pro 12,1.

Long time for booting (mostly stuck at grub), pressing a key there takes 10s to get any visual feedback and USB sometimes doesn't work at the login screen. When it works, if I plug a phone, after a while it shuts down completely.

Logs when it works are like:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1413440

I tried the latest kernel as of today:
http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.11-rc2/

Mainline kernel did not work, I'm trying now to recompile the stable kernel with xhci_hcd as a module and possibly blacklist it (see if fallbacking to ehci_hcd fixes at least usage after the long boot).