Livelock on recent current

[Thomas Mueller]

> I am seeing a problem since I moved to current on my laptop this week. It's
> odd as it is linked to the keyboard. As long as the keyboard is active,
> everything is fine, but if the keyboard is not used, after a few minutes,
> it locks up and gets very hot. The system may be busy or idle. The system
> seems completely locked. It does not respond in the network and the
> display, X or just vt is frozen. The only factor is use of the keyboard.
        
> I'm not sure what information I might collect.
 
> The system is a ThinkPad L15 with 4GN of DRAMM (more on order) .
> FreeBSD 13.0-CURRENT #2 r365481M: Tue Sep  8 20:16:02 PDT 2020
>     root at ptavv:/usr/obj/usr/src/amd64.amd64/sys/GENERIC-NODEBUG amd64
> FreeBSD ptavv 13.0-CURRENT FreeBSD 13.0-CURRENT #2 r365481M: Tue Sep  8
20:16:02 PDT 2020
> root at ptavv:/usr/obj/usr/src/amd64.amd64/sys/GENERIC-NODEBUG
 amd64
> Intel(R) Core(TM) i5-10210U CPU (Crystal Lake)

> Kevin Oberman, Part time kid herder and retired Network Engineer

Overheating, maybe?

I can see CPU temperature with "envstat" (NetBSD) or
sysctl -a | grep "temperature" (FreeBSD) :
don't know how Linux does it.

Is there any way you could run 
sysctl -a | grep "temperature"
at one- or two-minute intervals, perhaps on a different virtual terminal?

I've heard of laptops getting hot, but that was not specifically connected to keyboard inactivity.

Tom