On Tue, Apr 2, 2019 at 9:29 AM Alan Stern <stern@xxxxxxxxxxxxxxxxxxx> wrote: > Most likely the problem occurs somewhere inside > quirk_usb_handoff_xhci(). Can Jesse add debugging statements to that > routine in order to pin down exactly where the problem lies? Alan, I added debug statements to quirk_usb_early_handoff, quirk_usb_disable_ehci & ehci_bios_handoff. The box hangs right before calling: pci_write_config_byte(pdev, offset + 3, 1); which is in ehci_bios_handoff: [ 10.698240] DEBUG: Passed quirk_usb_early_handoff 1300 [ 10.704271] DEBUG: Passed quirk_usb_early_handoff 1308 [ 10.710206] DEBUG: Passed quirk_usb_disable_ehci 939 [ 10.715949] DEBUG: Passed quirk_usb_disable_ehci 945 [ 10.721685] DEBUG: Passed quirk_usb_disable_ehci 950 [ 10.727423] DEBUG: Passed quirk_usb_disable_ehci 958 [ 10.733160] DEBUG: Passed quirk_usb_disable_ehci 964 [ 10.738897] DEBUG: Passed quirk_usb_disable_ehci 968 [ 10.744633] DEBUG: Passed ehci_bios_handoff 849 [ 10.749884] DEBUG: Passed ehci_bios_handoff 884 I have attached the debug output, and my modified pci-quirks.c file to the bug report, let me know what else I can do to help.
