Power management and xscreensaver on armv7 (Pi2)

[Mayuresh <mayuresh%acm.org@localhost>]

On system:

$ uname -a
NetBSD pi 8.0_RC1 NetBSD 8.0_RC1 (RPI2) #0: Sun Jun 17 16:30:05 IST 2018
root@pi:/usr/src/sys/arch/evbarm/compile/RPI2 evbarm earmv7hf Cortex-A7
r0p5 (Cortex V7A core) NetBSD


I have enabled power saving options in xscreensaver, so as to switch off
monitor after 1 minute of inactivity. (The same options are tested and
work on amd64.)

On above system the screen is blanked but not switched off (backlight
remains on) after inactivity.

Which layer does this issue appear to be with (xscreensaver, power
management, the interaction between the two or the hardware) and are there
some workarounds?

Mayuresh