On the two laptops I have tested, blank=150 does not seem to make any difference. It seems to blank after the standard 10 minutes. I expected blanking after 150 minutes. Have not tried lower values.
I think I have confirmed this issue with blank=1. Sigh. Guess Xorg API must have changed.
Struggling to understand how to even print out the settings.
It used to work, so I going to do a binary search back through the version to figure out what change broke it. http://s.natalian.org/2014-03-12/xset-q.png
I've since discovered blanking does not work in Virtualbox, but it does on my NUC test machine.
So I am going to close the bug and blame Virtualbox. :) Please re-open if I missed something.
It does not work on any of the 3-5 machines I have tried on.
Doesn't look like I'm able to reopen, BTW.
Default is 10. 1 works, 13 works, 150 does not work (rather you get the default). Now trying with 99... which does not work. Now trying with 60...which also does not work.
I`m done testing. Solution seems to be to find the upper limit and document it in the wiki or (preferably) manage to somehow raise the limit (and then document that). From my testing the upper limit is somewhere between 13 and 60 minutes.