[Pkg-xfce-devel] Bug#714660: Bug#714660: xfce4-power-manager: Unchecked "Spin down hard disks" but hard disk still spins down

[Chris Bainbridge]

> Is the AC plugged when you check? Also, check if laptop-mode or other
> tool doesn't interfere here.

With AC all is fine and the drive does not spin down. On battery it
spins down. laptop-mode-tools is not installed.

The problem seems to be interaction with pm-utils: from
/var/log/pm-powersave.log I see that when I unplug AC pm-utils
immediately runs /usr/lib/pm-utils/power.d/95hdparm-apm, which sets
"APM_level = 127" on /dev/sda.

xfce4-power-manager depends on upower which depends on pm-utils, so
this isn't some unusual package interaction, these packages are always
going to be installed together.