Date: Sat, 15 Nov 2014 21:44:18 -0800 From: Adrian Chadd <adrian@freebsd.org> To: Steve Kargl <sgk@troutmask.apl.washington.edu>, Mark Murray <markm@freebsd.org>, =?UTF-8?Q?Dag=2DErling_Sm=C3=B8rgrav?= <des@freebsd.org> Cc: Hans Petter Selasky <hps@selasky.org>, freebsd-current <freebsd-current@freebsd.org> Subject: Re: USB locks up system -- WAS Re: shutdown or acpi problem Message-ID: <CAJ-Vmo=8oQdi_5um3ck%2BQwb=4KL2QfHE=ykQ2mNTJc5QerOEuw@mail.gmail.com> In-Reply-To: <20141116054141.GA33186@troutmask.apl.washington.edu> References: <20141112224212.GA14013@troutmask.apl.washington.edu> <20141113172533.GA18690@troutmask.apl.washington.edu> <20141113180332.GA18990@troutmask.apl.washington.edu> <20141113181515.GA19117@troutmask.apl.washington.edu> <546515BF.6030508@selasky.org> <20141113212206.GA20802@troutmask.apl.washington.edu> <20141116054141.GA33186@troutmask.apl.washington.edu>
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On 15 November 2014 21:41, Steve Kargl <sgk@troutmask.apl.washington.edu> wrote: > On Thu, Nov 13, 2014 at 01:22:06PM -0800, Steve Kargl wrote: >> 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. >> > > Well, this has been a waste of a day. The problem is caused > by r273872. This is the recent random device patch. I have no > idea why removing a usb device would cause the system to lock > up other than random is probably trying to harvest some entropy. + des / markm That's a good catch! It's not a waste of a day. Thankyou for digging into it and finding out what introduced the failure. Hopefully between Hans, des and markm a solution can be found. -adrian
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