Re: NetBSD on olimex lime2 ?

[Manuel Bouyer <bouyer%antioche.eu.org@localhost>]

On Thu, Oct 08, 2015 at 07:06:52PM +0200, Tobias Nygren wrote:
> On Thu, 8 Oct 2015 18:46:30 +0200
> Manuel Bouyer <bouyer%antioche.eu.org@localhost> wrote:
> 
> > Hello,
> > is there someone running NetBSD on a olimex lime2 board ?
> > I got mine to boot, but I have stability problems while the same
> > kernel is fine on a cubieboard 2 (it's netbsd-7).
> > I notice that the lime2 needs much more power than the cubieboard2
> > (about 100-150ma more); but I suspect the gigabit phy ...
> > Debian has power requirements of the same order.
> 
> It is not so much about the average power draw but about transients that
> these tiny switchmode regulators cannot handle very well. My Banana Pi
> would panic during bootup when powered from a 500mA rated USB charger
> even though measured power consumption is only 250mA. My fix was to
> solder a salvaged 6.3V 1000uF capacitor from a dead ATX motherboard
> directly on the +5V input (across the SATA power) and it hasn't crashed
> since. Your first measure should be to try a larger power supply and a
> shorter & thicker USB cable.

Yes, I tried both a USB port and an external 1.5A power supply, and I
get the same behavior.

The cubieboard 2 works fine with both power supply.

It seems that it's more stable if I boost the CPU voltage a bit
(I've completed the driver for the axp209 PMIC, so I can change the
CPU voltage).

-- 
Manuel Bouyer <bouyer%antioche.eu.org@localhost>
     NetBSD: 26 ans d'experience feront toujours la difference
--