Comment 47 for bug 371434

I had the same problem with my USB3.0-card.

lspci -v showed Kernelmodule xhci_hcd in use.

I blacklisted this module:
sudo echo blacklist xhci_hcd > /etc/modprobe.d/blacklist-xhci_hcd.conf

For acpiphp Kernelmodule:
sudo echo acpiphp >> /etc/modules

After reboot everything worked. No need for pciehp.pciehp_force=1