Re: battery drains after shutdown

[Bryan Henderson <bryanh@giraffe-data.com>]

I don't know much about power states in general, and I can't think of any
reason that any manipulation of the hardware clock would affect the power
state to which the computer shuts down.  This is probably more of a question
for an expert on shutdown.

I've heard of setting the clock disabling the wakeup, but not setting the
clock enabling wakeup.  I think you can determine whether this is happening,
though, by looking at /proc/driver/rtc contents before and after a
hwclock --systohc.

I do have one comment: doing hwclock --systohc at shutdown is almost always
the wrong thing to do; it is a custom that made sense 20 years ago, but not
today.

-- 
Bryan Henderson                                   San Jose, California