Re: sbs-linux: smart batteries on SourceForge (was New SmartBattery DSDT-based controller)

["François Valenduc" <fvalenduc-IWqWACnzNjyZIoH1IeqzKA@public.gmane.org>]

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Hello everybody,
Finally I found a recent IASL binary which seems to work. However, the 
use of this customized DSDT is not satisfactory. First, the FAN is now 
always on. Second, when the battery is fully loaded, the battery level 
is reported at 9% of remaining capacity. I own an ACER Travelmate 
4001Lmi, so I tried the patch dedicated to this model, but the result is 
not correct. The only positive point is that the bug addressed with the 
patch acpi-ec-nospinlock doens't seem to occur. There is no loss of 
reactivity when I use the SBS-CM method to access the battery. I have 
put in the attachement the original an pacthed DSDT table.

Thanks for your help,
François Valenduc

Rich Townsend a écrit :

> Hi all --
>
> I've finished the first cut of the DSDT hackery needed to get smart 
> battery systems (SBS) working like 'traditional' control method (CM) 
> batteries. This sounds like a kludge, but it's worth pointing out that 
> many modern laptops already use SBS batteries internally, but expose 
> them as CM batteries.
>
> The new code can be downloaded from the new SourceForge project I've 
> established:
>
> https://sourceforge.net/projects/sbs-linux/
>
> The package to download is SBS-CM-20050205. Basically, this package 
> provides patches against the DSDT (in source form, as decompiled using 
> the Intel compiler), that adds in the SBS-CM support. Full 
> instructions are provided in the accompanying README file.
>
> The following systems are "supported":
>
>  *) Acer Extensa 3002WLMi
>  *) Acer TravelMate 4000LMi
>  *) Acer TravelMate 4001LMi
>  *) Acer TravelMate 4001WLMi
>  *) Acer TravelMate 4002LMi
>  *) Acer TravelMate 4502LMi
>  *) Acer TravelMate 4502WLMi
>  *) Acer Extensa 3202XCi
>
> I'm currently working on the Acer Aspire 1692WLMi, which already 
> contains a broken SBS-CM implementation. The Acer TravelMate 382 and 
> Ferrari 3400 also already contain SBS-CM implementations, but I'm not 
> sure to what extent they work or not.
>
> As well as the DSDT patches, I provide in the package my embedded 
> controller patch, that improves the EC responsiveness by switching 
> from spinlocks to semaphores. I've tried out the other patches 
> mentioned recently on this list, but they either don't work, or reduce 
> EC access rates to a crawl.
>
> Note that battery events, including alarms, are properly handled; so 
> you should get notifications in /proc/acpi/event when something 
> interesting happens. In tandem with acpid, you can use these 
> notifications to, e.g., shutdown your system when the battery gets low.
>
> Bug reports, feature requests, etc, should be submitted using the 
> SourceForge project page -- not to the acpi-devel list, since it would 
> be a bit rude to flood the list with this stuff. But of course, 
> general smart battery discussion should continue on acpi-devel.
>
> Happy battery monitoring!
>
> cheers,
>
> Rich
>
>
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