Comment # 2 on bug 1094452 from David Rankin

This is not the intended behavior because it breaks console blanking for every
server operating without X. All monitors on my server are stuck ON 24/7 because
default console blanking is broken.

The intended behavior is to have consoleblank default to 600, so that console
blanking works correctly. This has worked properly for nearly 20 years. There
is no reason to break the default behavior by zeroing consoleblank. 

The underlying issue is apparently a problem with the vt blanking effecting the
new X. So instead of fixing X properly to work with default consoleblank, all
default console blanking was broken by setting the value to 0 as a workaround
to an X problem.

Let's fix the problem so that default console blanking works correctly, as it
always has, instead of just giving up and disabling console DPMS altogether.