Also, it would be good to document somewhere that, --hrng=driver needs to be omitted eg: RNGDOPTIONS="--fill-watermark=90% --feed-interval=1"
cat /proc/sys/kernel/random/entropy_avail hovers close to 4000 after this is enabled on my Thinkpad. Without it, it hovers around between the mid-to-high-2000s, and it sometimes dips below 2000 without these options. On my Xeon server, it hovers around the mid-3000s with these RNGDOPTIONS, and hovers around the mid-2000s without; it also sometimes dips below 2000 without these options. I'd be happy to use the ent suite to compare without tpm_rng, with tpm_rng and rng-tools, and with tpm_rng, rng-tools, and these RNGDOPTIONS, if that data is necessary to justify this near-trivial documentation update. Cheers, Nicholas
