USB locks up system -- WAS Re: shutdown or acpi problem

[Hans Petter Selasky]

On 11/13/14 19:15, Steve Kargl wrote:
> On Thu, Nov 13, 2014 at 10:03:32AM -0800, Steve Kargl wrote:
>> On Thu, Nov 13, 2014 at 09:25:33AM -0800, Steve Kargl wrote:
>>> On Wed, Nov 12, 2014 at 02:42:13PM -0800, Steve Kargl wrote:
>>>> I have a kernel/world from r274273 sources, which is exhibiting a new
>>>> issue on my old laptop.  Neither 'shutdown -p now' nor 'shutdown -r now'
>>>> work.  I get to the end of shutdown and see for example
>>>>
>>>> All buffers synced
>>>> Uptime: 4h23m15s
>>>>
>>>> and then the laptop just sits there.  It does not power off with
>>>> the -p option nor does it reboot with the -r.  Has anyone else
>>>> seen this behavior?
>>>>
>>>
>>> The problem appears to be related to a recent change in the
>>> USB stack.  If I have the following drive plugged into a
>>> usb port, the above behavior is observed on shutdown.
>>>
>
> Adding
>
> hw.usb.no_shutdown_wait: 1
>
> to /boot/loader.conf appears to work around the 'shutdown -p now'
> and 'shutdown -r now' issue.  Unfortunately, the bricking of the
> laptop is not affected by this sysctl.  Once a device is plugged
> into a usb, it must remain plugged in.
>

Hi,

Is using this sysctl/tunable a suitable solution for you?

--HPS