USB locks up system -- WAS Re: shutdown or acpi problem
Mark R V Murray
markm at FreeBSD.org
Sun Nov 16 18:55:57 UTC 2014
> On 16 Nov 2014, at 18:51, Steve Kargl <sgk at troutmask.apl.washington.edu> wrote:
>
>>
>> I?m sorry my commit caused the problem.
>>
>
> 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.
>
> 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.
>
> 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
> the device.
Strange for me too. I’m 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
--
Mark R V Murray
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