Public bug reported:
On my *desktop* machine, on_ac_power returns 255 as a status code, which
according to the man page means "Power status could not be determined".
This is reasonable, but unfortunately /etc/apm/event.d/20hdparm takes it
(*) as meaning "use the conservative setting" which sets the hard drive
to spin down after 90 seconds of inactivity. This is entirely
inappropriate for a desktop machine, as now I have to wait several
seconds each time I access my non-system hard drive.
/etc/apm/event.d/20hdparm should really take 255 to mean "this is
unlikely to be a battery-powered machine at all, don't mess with the
power management settings".
(*) relevant snippet:
choose_power ()
{
if on_ac_power > /dev/null
then
power_performance
else
power_conserve
fi
}
** Affects: hdparm (Ubuntu)
Importance: Undecided
Status: New
** Package changed: laptop-mode-tools (Ubuntu) => hdparm (Ubuntu)
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https://bugs.launchpad.net/bugs/1502307
Title:
improper APM settings chosen when power status cannot be determined
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