Shall we hide the GUI for Hibernate in Natty?

[Phillip Susi]

On 2/22/2011 6:22 AM, Chow Loong Jin wrote:
> Sounds just about as disastrous as laptops running out of battery during a
> suspend, actually. Which is not as serious as running out of battery while
> attempting to hibernate, which seems to be occurring much more often than the
> case of running out of battery while suspended. On the other hand, like Marco
> mentioned, TuxOnIce is likely to be able to allow more laptops to safely
> hibernate on low battery as it finishes a lot faster.

I would think the likelyhood would be the other way around.  If the
battery gas gauge is properly calibrated, you should be hibernating with
well over 30 seconds of power left and so not running out of power.  On
the other hand, people frequently close the lid and leave the laptop
there for hours or days, not even thinking that the battery is still
running down.

If you are running out of power before the hibernate finishes, then one
of two things is wrong:

1)  Your gas gauge is not properly calibrated and is reporting that you
have more remaining power than you actually do

2)  Your "dead battery" threshold where you go to hibernate is set too low

Raising that threshold will fix the problem.

> Actually no, my laptop battery's full charge state can last for an hour, but
> even after showing 0%, it can stay in suspend-to-RAM mode for more than half a
> day. I haven't tried letting it run longer though.

Then your gas gauge is wrong and you either need to recalibrate it or
get a new battery.  From the laptops that I have seen, it seems normal
to drain about 1% of capacity per hour in suspend ( give or take ), so
if it lasts half a day, then that 0% reading is quite a ways off.
Staying at 100% after an hour of use is another sure sign that the gauge
is broken.