I think the kernel message[2] gives some information about it, because it gives two different port number on the USB device. But I know almost nothing about USB, so I'm not sure what's happening.The I plugged in the USB disk, it worked fine again.modprobe ehci-pcirmmod ehci_pciFirst I tested a USB disk on the buggy USB port before suspending the system, it works fine. Then I unplugged the USB disk, suspended my system, resume, and replugged the disk, the bug occurred. Then I unplugged the disk, reload the ehci_pci module as follows:Hi,I'm using the new Lenovo T420 port on gerrit[1] and found a bug about USB(in my post on the gerrit page). And just now I found a work around on this issue.-- coreboot mailing list: coreboot@coreboot.org http://www.coreboot.org/mailman/listinfo/coreboot