Re: Crash when unplugging a UPS USB connection

Please report to bugs@ with the following,

- quick summary of problem
- dmesg
- a text version of the panic/crash message
- at least a text version of the function names from the backtrace
if not the full thing
- links to images hosted elsewhere (not attachments) if the text version
of the above isn't the full thing


On 2021-08-03, Mike <the.lists@mgm51.com> wrote:
> On 7/12/2021 4:16 PM, Mike wrote:
>> On 7/12/2021 3:12 PM, Mike Larkin wrote:
>>> On Sun, Jul 11, 2021 at 04:11:39PM -0400, Mike wrote:
>>>> I run NUT on OpenBSD to monitor a Cyperpower UPS. The UPS plugs into
>>>> the OpenBSD box via a USB connection.
>>>>
>>>> OpenBSD 6.8, I had no problems, everything ran fine. When the power
>>>> went out, NUT saw that and reacted according to configuration.
>>>>
>>>> After I upgraded to OpenBSD 6.9 (a fresh install, not an in-place
>>>> upgrade), when the power dropped, I'd be greeted with a blue crash screen.
>>>>
>>>> It seems that when the power drops, the UPS temporarily drops the USB
>>>> connection, seemingly the equivalent of unplugging the USB connector.
>>>>
>>>> I am able to reproduce that 100% by booting up OpenBSD 6.9 with the UPS
>>>> communications cable plugged into the USB port. When I unplugged that
>>>> USB connector, the crash occurs.
>>>>
>>>> This first occurred on my production box which is a Supermicro
>>>> motherboard. I can provide that dmesg if needed.
>>>>
>>>>
>>>> Both OpenBSD 6.8 and current below are fresh installs on a test Lenovo
>>>> laptop.
>>>>
>>>> On OpenBSD 6.8, when I plug in the UPS and unplug it, here is what I see
>>>> on the console (dmesg is included):
>>>>
>>>
>>> This crash happens to me as well when I unplug my upd(4). I'll try to find
>>> what diff caused this.
>>>
>>> -ml
>>
>>
>> Many thanks for the confirmation!
>>
>> Mike.
>>
>>
>
> This crash also occurs with the following two UPSs:
>
> Cyberpower EC750G
> Tripp-Lite OmniSmart1500LCDT
>
> As before, to reproduce it....
>
> 1) fresh install of OpenBSD current
> 2) do the reboot after the install
> 3) plug in the UPS
> 4) unplug it
>
>
> I can supply images of the crash screens for the two UPSs above if they
> are needed.
>
> Thanks!
>
>
>
>