I found a solution... kernel with built-in: USB_EHCI_HCD=y USB_UHCI_HCD=y
It's seems to work and avoid the : - Warning! ehci_hcd should always be loaded before uhci_hcd and ohci_hcd, not after But, i cannot see any other difference/explanation between built-in and module Dominique ** Attachment added: "Boot with usb (ehci/uhci) built-in" http://launchpadlibrarian.net/40921678/kern.log -- Logitech QuickCam USB webcams using pwc module (Pro, 3000, 4000) do not work if connected after booting https://bugs.launchpad.net/bugs/443278 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs