Bug#644174: ACPI I/O resource conflicts with ACPI region SMBI

[Jonathan Nieder <jrnieder@gmail.com>]

Mathieu Malaterre wrote:

> So short story: just unplugged any USB device and it should boot nicely.
>
> Let me know if I should just close this bug.

Thanks for the follow up.

No, we shouldn't close this --- it seems it's just another sign that
xhci support is a little broken in squeeze.  Nice to see that's the
*only* problem here. :)

What is the latest squeeze kernel you've tried and reproduced this
with?  ("cat /proc/version" will say the current version in
parentheses.)

To move forward:

 - Please attach "acpidump" output.  (I doubt it's relevant, but it's
   useful to have for reference.)

 - Please test a v3.2 release candidate from experimental.  The only
   packages from outside squeeze that should be needed for this, aside
   from the kernel image itself, are linux-base and initramfs-tools.

 - If it reproduces the problem, please blacklist the xhci_hcd
   module by writing

	blacklist xhci_hcd

   to a file /etc/modprobe.d/mm-blacklist-xhci.conf, run

	update-initramfs -u -k all

   and reboot to try again without USB 3.0 support.  If we're very
   lucky, this will work around the problem.  In that case, please
   write a summary of the problem to upstream
   (linux-usb@vger.kernel.org, cc-ing Sarah Sharp
   <sarah.a.sharp@linux.intel.com> and either me or this bug log so we
   can track the resulting discussion).  Be sure to include:

    - steps to reproduce the problem
    - symptoms, and how they differ from what you expected
    - ways to avoid triggering the problem (maybe some USB ports
      trigger it and others don't? etc)
    - full "dmesg" output from booting, and a photo of the screen
      after reproducing the problem (ideally by running "modprobe
      xhci_hcd" in the very same run of Linux), as attachments
    - which kernel versions you've tested, and what happened with each
    - a link to this bug log for the full story
    - any other weird symptoms or observations

Thanks for your patience and hope that helps,
Jonathan