Sony Vaio Battery Info

Sony Vaio Battery Info

[Markus Gaugusch]

As previously written, reading the battery info on sony vaio laptops
(FX/FXA series) takes very long time (~0.6 sec). Battery state takes only
~0.1 sec, but this is still too long for constantly using a battery
monitor.

I'd like to find the bug, but need some help. My first idea is to put time
stamps to the debug messages. Bob Moore suggested to begin with the EC
code.

I don't really know how to do this (finding the ec code won't be so hard,
but I don't think that 'normal' libc time functions will work in kernel).
Any volunteers? ;)

Markus

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Re: Sony Vaio Battery Info

[Malte Thoma]

Markus Gaugusch wrote:
> As previously written, reading the battery info on sony vaio laptops
> (FX/FXA series) takes very long time (~0.6 sec). Battery state takes only
> ~0.1 sec, but this is still too long for constantly using a battery
> monitor.


Hallo Marcus,
(perhaps you remember me:-)

I have a SONY-VAIO FX505, is the 'keybord-look-bug' fixed? (I still run 
an half-year-old ACPI)

In my opinion the info-file need only to be read ONCE, because it 
contains only 'static' infos about the battery.
My skills are not high enough to help you withe the bug, but I would 
like to invite you to test (use, help me to improve) heatload, which is 
a small applet, showing information about the battery (and something more).

Greetings,

Malte


https://lists.berlios.de/mailman/listinfo/heatload-general



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Re: Sony Vaio Battery Info

[Pavel Machek]

Hi!

> Markus Gaugusch wrote:
> >As previously written, reading the battery info on sony vaio laptops
> >(FX/FXA series) takes very long time (~0.6 sec). Battery state takes 
> >only
> >~0.1 sec, but this is still too long for constantly using a battery
> >monitor.
> 
> 
> Hallo Marcus,
> (perhaps you remember me:-)
> 
> I have a SONY-VAIO FX505, is the 'keybord-look-bug' fixed? (I still 
> run an half-year-old ACPI)
> 
> In my opinion the info-file need only to be read ONCE, because it 
> contains only 'static' infos about the battery.

Like capacity at last charge? That can change, too.
OTOH Reading it once in 3 hours should be ok
-- 
				Pavel
Written on sharp zaurus, because my Velo1 broke. If you have Velo you don't need...



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Re: Sony Vaio Battery Info

[Stephen White]

---- Original Message ----
> From Markus Gaugusch <markus-z+rTbpWsRgbk7+2FdBfRIA@public.gmane.org>
> Date: Thursday, 19 Dec 2002, 20:13
>
> I don't really know how to do this (finding the ec code won't be so hard,
> but I don't think that 'normal' libc time functions will work in kernel).
> Any volunteers? ;)

You shouldn't need to use the time functions .. just print out the
kernel's 'jiffy' count.  It's only 100Hz but since we're looking for
0.6s that shouldn't matter.

If you need debug timings more precisely then on x86:

#define _int64 long long // The kernel may have something like this already .. I can't remember
#define prectime() ({ _int64 u; asm("rdtsc": "=A" (u)); u; })

will give you a way of accessing the time stamp counter which on Pentium 
class chips will count CPU cycles .. which gives somewhat more precise 
profiling information.

This is something I keep meaning to look at, but I seem to be missing a 
large number of 'tuits' (especially the round variety).

-- 
Stephen White <stephen-acpi-devel-4QvXXjU8Dv4@public.gmane.org>


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