I've had a look at the acpi-support diff, and the reason this fix isn't
taking effect is this code:
DO_HDPARM=y
if [ -e /usr/sbin/laptop_mode ] ; then
LMT_CONTROL_HD_POWERMGMT=$(. /etc/laptop-mode/laptop-mode.conf && echo
"$CONTROL_HD_POWERMGMT")
if [ "$LMT_CONTROL_HD_POWERMGMT" != 0 ] ; then
# Laptop mode controls hdparm -B settings, we don't.
DO_HDPARM=n
fi
fi
This checks whether laptop-mode is configured to use hdparm, but fails
to check whether laptop-mode is *enabled* on the system, which it isn't
by default.
Will integrate an additional check for /var/run/laptop-mode-
tools/enabled, which is what laptop-mode itself uses at runtime.
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High frequency of load/unload cycles on some hard disks may shorten lifetime
https://bugs.launchpad.net/bugs/59695
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