[ltp] [tp_smapi] stop_charge_thresh on R51

[Shem Multinymous]

On 4/13/06, Andrew Barr <andrew.james.barr@gmail.com> wrote:
> After reading over the battery-life discussions of a week or so ago, I
> thought that stop_charge_thresh might be a useful feature to have in
> keeping my battery in tip-top shape. It's not supported by tp_smapi on
> my R51, it says "Function not supported by SMAPI BIOS". Does this mean
> the hardware does not support it or just tp_smapi? I haven't had a
> bare-metal installation of Windows in several months, but IIRC the
> ThinkPad tools supported a similar feature. I'd be willing to re-install
> Windows and poke around with a debugger if it would help in supporting
> that feature for tp_smapi.

This has been discussed here a few times. The hardware (or more
exactly, BIOS firmware) does not support the function used for this
purpose in later models. Perhaps there's another equivalent SMAPI
function on the R51, but you may need to reverse-engineer your Windows
installation to find out.

In any case, if inhibit_charge_minutes works for you, you can use it
to emulate stop_charge_thresh; a scriptlet for doing this was recently
posted here.

  Shem