re: port-amd64/53135: envstat(8) hangs in tstile

[matthew green <mrg%eterna.com.au@localhost>]

i have a similar problem on a HP notebook.  i haven't disable
lot of acpi* drivers to have a semi-stable system, and it ususally
fails to shut down.

i did get as far as knowing that there is an ACPI lock held and no
released, but i don't know much about how ACPI works.

the machine is a HP "14an013nr".  unfortunately, i never got around
to trying to debug it further.