I've given up on hdparm.conf now. As noted in #27, it seems that systemd
and udev/udisks2 is the way to go, but it's not clear how exactly.
Here's what I've done. This bug report isn't the ideal place to document
it, but I can't find a better place for now. Maybe it'll help someone
who finds it through a search engine.
The Ubuntu Disks utility (not in the Launcher by default) allows
configuration of the spindown/standby time and other settings. (See
below for Kubuntu.) Click on the disk in the left-hand pane, then click
the "hamburger" icon at the top right and select Drive Settings.
Great! Except... what it says in the title of this bug. Also:
https://bugs.launchpad.net/ubuntu/+source/gnome-disk-utility/+bug/1511703
I fixed this by coding a sleep script as shown in
https://wiki.archlinux.org/index.php/Power_management#Hooks_in_.2Fusr.2Flib.2Fsystemd.2Fsystem-sleep
Note the directory in Ubuntu is /lib/systemd/system-sleep/, which is different
from Arch Linux.
In the "post/*" case I simply coded the required hdparm command
directly, e.g.
hdparm -B 254 -S 120 /dev/sdb
I'd earlier tried to make hdparm.conf work by emulating the pmutils
scripts by coding, e.g.,
DEVNAME=/dev/sdb /lib/udev/hdparm
but that didn't work for some reason. I don't think I worked out why.
Kubuntu users (like me) and others who don't have the Ubuntu Disks
utility available need to write a config file (which, of course, is what
hdparm.conf is) to set the post-boot spindown time, etc. See udisks(8)
for the format of the file /etc/udisks2/IDENTIFIER.conf, the file which
the Disks utility writes. For instance:
[ATA]
APMLevel=254
StandbyTimeout=120
What is IDENTIFIER? Run "udisksctl dump" (the output is piped to less) and look
for an object path starting "/org/freedesktop/UDisks2/drives/" with your drive
model and serial number. Within the org.freedesktop.UDisks2.Drive interface
underneath that, the Id property is the required IDENTIFIER part of the
filename. See
http://udisks.freedesktop.org/docs/latest/gdbus-org.freedesktop.UDisks2.Drive.html#gdbus-property-org-freedesktop-UDisks2-Drive.Id
So it seems that in 2015, it's a bit more complicated than writing
/etc/hdparm.conf. It seems (unless there's currently a better way) it's
necessary to specify the hdparm settings for the post-boot and post-
resume conditions in two different ways.
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https://bugs.launchpad.net/bugs/199094
Title:
hdparm.conf settings (other than apm) are lost on suspend/resume?
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