[Bug 243249] FreeBSD 12.1 ThinkPad X201 20 second delay during resume

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=243249

--- Comment #4 from Jason W. Bacon <jwb at freebsd.org> ---
Homed in on the issue by disabling all non-essential modules in
/boot/loader.conf and services /etc/rc.conf, which alleviated the issue, then
restoring them one by one.

The delay appears to be tied to kernel frequency.

I had set kern.hz=100 in loader.conf to extend battery life.  I've been doing
this on laptops and it has never had a negative impact, until I upgraded to
12.x on the ThinkPad X201.

After removing this and restoring all other modules and servies, the delay is
about 2 seconds rather than 20.  So increasing the kernel frequency by a factor
of 10 (default is 1000) reduces the delay by a factor of 10.

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