Messages in this thread | | | Date | Fri, 9 Jan 2009 11:13:17 +0100 | From | Pavel Machek <> | Subject | Re: HP accelerometer: free fall detection working, testers wanted |
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On Sun 2008-11-30 23:16:29, Éric Piel wrote: > Pavel Machek schreef: > > Hi! > > > >>> I got free fall detection to work -- apparently BIOS does all the > >>> important stuff itself. > >>> > >>> Now... I'd like some testers. (Don't comment on code... yet. Yes, it > >>> has some issues). > > >> Also, how do you try free fall? Did you try also with the lid > >> opened? > > > > With the lid opened, too, yes. I just took the machine, then tried to > > let go and catch it meter below that. (Of course I did not really let > > go, but released the grip and followed...) > > Hi, > I've tested it. Mostly, it works. If I let it fall, it detects it. If I > repeat, it detects it again. If shake it, it doesn't detect any freefall > (good). However, for this to work on my laptop (2510p), after the device > is turned on, the AC must be unplugged and lid closed before it starts > working. It seems that that's only this specific state that triggers the > configuration of the sensor by the bios. Once setup, I can plug back and > open again the lid, the sensor keeps detecting the freefalls (until it's > turned off again). > > So I think it's still necessary to explicitly set up the sensor. It's > just a matter of setting up the registers as the bios does. We should be > able to manage (just by dumping them once).
Well, according to HP we should not be setting registers ourselves. Maybe CLRI method needs to be called or something?
> BTW, there were a couple of problems with the scripts. You have change > "/dev/misc" to "/dev/freefall" (which I also like more) but forgot to > update the driver itself. > > For hp3dg, it couldn't find the led (not the same truncation of the name > of the led). Probably you could replace the name of the led by: > /sys/class/leds/*hddprotect*/
Yes, the scripts were very very quick hacks. Pavel -- (english) http://www.livejournal.com/~pavelmachek (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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