As previously noted, mainline commit 27a41a83ec54 ("xhci: Cleanup only
when releasing primary hcd") causes this boot hang. I can reproduce the
problem with VirtualBox 5.1.x, booting any kernel version which includes
that commit (Xenial, Yakkety, or mainline v4.7-rc1).
I think I have identified the specific problem in that commit and have a
constructed a test patch (attached for reference). This appears to fix
the VirtualBox boot hang but I'd like some confirmation that it results
in otherwise normal USB3.0 functionality. Here's a Xenial test kernel
with the test patch applied:
http://people.canonical.com/~kamal/lp1604058/
Affected users, please advise whether this fixes the boot hang in your
VirtualBox environment, and whether your USB3.0 behavior is back to
normal.
** Patch added:
"0001-TEST-xhci-Fix-soft-lockup-in-xhci_pci_probe-path-whe.patch"
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1604058/+attachment/4705504/+files/0001-TEST-xhci-Fix-soft-lockup-in-xhci_pci_probe-path-whe.patch
** Changed in: linux (Ubuntu Xenial)
Assignee: Joseph Salisbury (jsalisbury) => Kamal Mostafa (kamalmostafa)
** Changed in: linux (Ubuntu)
Assignee: Joseph Salisbury (jsalisbury) => Kamal Mostafa (kamalmostafa)
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https://bugs.launchpad.net/bugs/1604058
Title:
virtualbox+usb 3.0 breaks boot, -28 kernel works
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