Comment # 1 on bug 1156441 from Michael Chang

(In reply to Fabian Vogt from comment #0)
> Some grub2 configs rely on being able to read and write certain environment
> variables (like health_checker_flag), but this only works if grub2-editenv
> was called previously. grub2-install should take care of setting up the
> env_block for systems which need it, if it doesn't exist yet.

The real usage of grubenv is really out of control by the grub-install as it is
specific to application by dropping it's own snipped to grub-mkconfig or via
custom.cfg to source it somewhere.

If I remember correctly Ignaz has a solution to the health_checker_flag issue
by using a writable subvolume in combination of grub script snippet. Would this
be related or we are having other issue ?

Thanks.