https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=216261
Bug ID: 216261
Summary: [patch] Resume failing without xhci controller reset
Product: Base System
Version: CURRENT
Hardware: amd64
OS: Any
Status: New
Keywords: patch
Severity: Affects Some People
Priority: ---
Component: usb
Assignee: freebsd-usb@FreeBSD.org
Reporter: yanko.yanku...@gmail.com
CC: freebsd-am...@freebsd.org
Keywords: patch
CC: freebsd-am...@freebsd.org
Created attachment 179073
--> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=179073&action=edit
propoesed patch
On my new Skylake based laptop Suspend/Resume was failing (no resume_beep at
all). I was able to resolve the issue by adding controller reset of the xhci
controller after the xhci_halt_controller calls.
The problem is clearly BIOS bug as the Suspend/Resume is failing without
loading the xhci driver. The same is happening with latest Linux when the xhci
driver is not loaded.
Adding the reset code solves the issue. The Linux driver seems to do the same
on driver unload, so I am not expecting a regression by the change.
A simple patch to implement this is attached.
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