I have just realized a upstream kernel is working fine (no boot parameters are necessary). I use http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.15-rc5-utopic/
I suppose this is the relevant change: http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/diff/drivers/usb/host/xhci-pci.c?id=fefb82756e9fd89d0c0d5983e056df81d51eb075
I have just realized a upstream kernel is working fine (no boot parameters are necessary). kernel. ubuntu. com/~kernel- ppa/mainline/ v3.15-rc5- utopic/
I use http://
I suppose this is the relevant change: http:// git.kernel. org/cgit/ linux/kernel/ git/torvalds/ linux.git/ diff/drivers/ usb/host/ xhci-pci. c?id=fefb82756e 9fd89d0c0d5983e 056df81d51eb075