(apologies if this is duplicate; I've tried posting several times over the past few days, but it seems to be getting silently dropped) This problem occurs in 3.9.0 and 3.9.3, but not in 3.6.11. Stock kernel, not tainted, most things (including USB drivers) compiled as modules. modprobing ehci_hcd (with no HCD modules loaded) logs only one line in dmesg: ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver I expect it to take control of my USB card, which is this: 00:12.2 USB controller: Advanced Micro Devices [AMD] nee ATI SB7x0/SB8x0/SB9x0 USB EHCI Controller Also, /sys/bus/pci/drivers/ehci_hcd does not exist. Also also, 'modinfo ehci_hcd' shows no 'alias' lines. Modprobe of ohci_hcd does what I expect: - shows the appropriate messages about finding the chipsets. - creates /sys/bus/pci/drivers/ohci_hcd - registers all my USB hubs and devices, which work at <= 12Mbps So ehci_hcd is just sitting there like a lump - no errors, no activity. Please let me know what other information would be helpful. -Eric -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html