Date: Sun, 16 Nov 2014 18:55:53 +0000 From: Mark R V Murray <markm@FreeBSD.org> To: Steve Kargl <sgk@troutmask.apl.washington.edu> Cc: Hans Petter Selasky <hps@selasky.org>, Adrian Chadd <adrian@freebsd.org>, freebsd-current <freebsd-current@freebsd.org>, Dag-Erling Sm?rgrav <des@freebsd.org>, Ian Lepore <ian@FreeBSD.org> Subject: Re: USB locks up system -- WAS Re: shutdown or acpi problem Message-ID: <4443FEFB-17F1-4516-959F-4C70AB2A4382@FreeBSD.org> In-Reply-To: <20141116185141.GB36021@troutmask.apl.washington.edu> References: <546515BF.6030508@selasky.org> <20141113212206.GA20802@troutmask.apl.washington.edu> <20141116054141.GA33186@troutmask.apl.washington.edu> <CAJ-Vmo=8oQdi_5um3ck%2BQwb=4KL2QfHE=ykQ2mNTJc5QerOEuw@mail.gmail.com> <20141116175102.GA35649@troutmask.apl.washington.edu> <D5925789-834A-42C8-9854-2E055592DA46@FreeBSD.org> <1416162070.4781.186.camel@revolution.hippie.lan> <F0B9570C-BADD-4843-AE91-66CAB0B5DE85@FreeBSD.org> <1416162718.4781.192.camel@revolution.hippie.lan> <4F3B4E02-0ADD-46EB-BB90-BF360E810585@FreeBSD.org> <20141116185141.GB36021@troutmask.apl.washington.edu>
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> On 16 Nov 2014, at 18:51, Steve Kargl = <sgk@troutmask.apl.washington.edu> wrote: >=20 >>=20 >> I?m sorry my commit caused the problem. >>=20 >=20 > Nothing to be sorry about. This is -current after all. Thanks :-) >> I?m also trying to find out why, but I don?t know enough about USB or >> mass-storage devices to know why, so this may take me a while. In the >> meanwhile, I?ll try to help by pointing out things I do know. >=20 > Yes, I did the bisection to find that r273872 exposes the problem. > What I don't know is if this is hardware specific to a Dell Latitude > D530 laptop, USB specific, or some weird interaction between the > random and USB. >=20 > What I also find odd is that I seem to be the only person seeing > this behavior when it is trivial for me to reproduce: boot laptop, > plug in usb device, wait usb recognizes the device, then unplug=20 > the device. Strange for me too. I=E2=80=99m not exactly being bombarded with bug = reports. > If you have not read the entire thread, once the laptop keyboard and > video output lock up, I can ssh into the laptop. If I run usbconfig, > it hangs, ^T tells me it is stuck in SX Lock, and the /dev/da0* = devices > have not been destroyed. Weirder and weirder :-(. Something with SX locks? Hmm. I do use those for attach and detach for RNG sources. Could it be that that stick of yours is somehow getting involved in the RNG source locks? M --=20 Mark R V Murray
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