powerd may lock display if adaptive

On current try run this after fresh reboot
# powerd -a adaptive -b adaptive -n adaptive

then log on as normal user in console and run
% primes 44

after some calculations display should freeze, but everything still
works, sound is playing, you may stop calculations and start X or
change vty but display will not change - still displaying console and
prime numbers.

I would like if somebody else may this confirm.