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

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Message-ID: <20110415213817.GC4420@atrey.karlin.mff.cuni.cz>
Date:	Fri, 15 Apr 2011 23:38:17 +0200
From:	Cyril Hrubis <metan@....cz>
To:	Pavel Machek <pavel@....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...

> 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).

> (
> So... just because something needs 5V does not mean you should charge
> it from USB.
> 
> Yes, I'm talking about zaurus. I noticed that it crashed rather
> quickly when connected to USB power. (For example in tar/rm test).
> So I took multimeter, and there was 4.15..4.5V on USB :-(.
> 
> 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.

-- 
metan
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