I updated to kernel 4.12 and the kernel recover usb failures on boot ( the clue was that the usb live cd booted , recovering usb failures, with ubuntu 17.04 kernel 4.10 )
+ i booted on macos , and updated the system from the default macos updater : some stuff on the "bios" should have been updated and now everything is fine I dig into the intel problems and found this , for the record : https://www.google.fr/search?q=xhci+host+controller+reset+may+cause+system+to+hang -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1668105 Title: xhci_hcd module turns off usb host controller on boot To manage notifications about this bug go to: https://bugs.launchpad.net/linux/+bug/1668105/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
