Re: Crash when unplugging a UPS USB connection

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!