> On 13 Mar 2021, at 05:50, А. Сорокин via Dng <dng@???> wrote:
>
> Hello.
>
>
> I have a strange behavior on my system (DeVuan's Sid (Ceres?)
> up-to-date system): on quick pressing (may be it seems to system as keys
> are pressed at once), of Shift-b-v (no matter where: CLI or GUI) system
> shuts down normally. Of course, typing abbreviation, consisting of those
> letters makes one unhappy.
>
> Any ideas why is it so? -- Is it in the system, am i alone withe the
> problem, is it a virus, or a BIOS short key that system responds so?
>
> Thank you for any advance.
>
>
> Andrey.

You’re not accidentally pressing the SysRq key at the same time?

https://en.m.wikipedia.org/wiki/Magic_SysRq_key