linux-kernel - Re: Zaurus CF tests -- ok

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Message-ID: <20110416074134.GA26440@ucw.cz>
Date:	Sat, 16 Apr 2011 09:41:34 +0200
From:	Pavel Machek <pavel@....cz>
To:	Cyril Hrubis <metan@....cz>
Cc:	rpurdie@...ys.net, lenz@...wisc.edu,
	kernel list <linux-kernel@...r.kernel.org>, arminlitzel@....de,
	thommycheck@...il.com,
	linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>,
	dbaryshkov@...il.com, omegamoon@...il.com, eric.y.miao@...il.com,
	utx@...guin.cz, zaurus-devel@...ts.linuxtogo.org,
	Marek Vasut <marek.vasut@...il.com>
Subject: Re: Zaurus CF tests -- ok

Hi!

> > After getting _good_ power supply, I was able to untar and rm ltp tree
> > 100 times so far. 2.6.38, ext3. (So metan no, I do not see any weird
> > ext3 problems).
> 
> Hmm, I'm using original adapter, but who knows if it's okay to use...

It probably is...

> > Another strange thing is... I see lots of duplicated keystrokes --
> > like type "pavel" but machine understands "paavel". But it only seems
> > to happen when I'm _not_ trying to debug it?!
> 
> That seems to be side effect of machine under load (it has gpio keyboard).

ouch. original corgi_kbd driver used timers, new one uses threads --
more affected by scheduling. I'm not even sure if the worker thread it
uses runs at elevated priority...

> > With power from USB extension cable, it crashes in <5 minutes. It
> > seems to toggle charger a lot, as voltage on the cable is only
> > 4.2..4.5V. I guess it is software problem in the charging code.
> > )
> 
> The zaurus actually is AFAIK unable to run from battery when connected to the
> external power, so weak power line may explain some of the strange behaviour.

?? IIRC Stanislav told me that hardware will always run off whatever
is available...?
							Pavel

-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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