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

On Thu, Nov 13, 2014 at 09:34:07PM +0100, Hans Petter Selasky wrote:
> 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?
> 

The sysctl is a suitable solution for the shutdown issues.
It is not suitable solution for the general use of using
a memory stick to for example quickly transfer files.  Once
the memory stick is plugged into the usb port, it must
remain there unless one wants to reboot the system.

I rebuilt the kernel with USB_DEBUG and CAMDEBUG enabled.
I need to wade through a rather large /var/log/messages
to see if anything appears unusual.

-- 
Steve