Since you mention 4.19...

I've got: kernel version:     4.19.98-1 (2020-01-26) kernel release: 
    4.19.0-8-amd64cpu:             Intel(R) Core(TM) i7-
3740QM CPU @ 2.70GHz
I mentioned previously that when I run a cpu-heavy application (cpu
cryptominer) for a number of hours (14 hours to failure the only time I
clocked it) I get this problem where the gui freezes to the point that
I have to reboot. This started right after the upgrade to beowulf.
Just a note, all the machines I've upgraded from ascii to beowulf so
far have upgraded the kernel to 4.19. 

On Thu, 2020-05-28 at 19:35 +1000, wirelessduck--- via Dng wrote:
> > You're very likely required to upgrade to a much newer Kernel
> > version. I
> > suggest you to use the most recent stable kernel version and build
> > it from
> > source ( Not that hard, ask me for help if needed) For me the
> > upgrade
> > fixed the issue.
> >
> > cheers,
> > Andreas
>
> There’s also a slightly newer version 4.19 available from backports
> repository. While not as new as the most recent stable kernel, it
> might be quicker and easier to test out than compiling as it’s
> available through apt.
>
> https://pkginfo.devuan.org/stage/ascii/ascii-backports/linux-image-amd64_4.19+105+deb10u3~bpo9+1.html
>
> If that doesn’t work then I agree that compiling the latest stable
> would be the next choice.
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