Re: making debs for u-boot kernels
On Monday 29 July 2019 09:17:37 Reco wrote:
> On Mon, Jul 29, 2019 at 07:56:25AM -0400, Gene Heskett wrote:
> > On Monday 29 July 2019 05:08:49 Reco wrote:
> > > On Sun, Jul 28, 2019 at 08:15:20PM -0400, Gene Heskett wrote:
> > > > On Sunday 28 July 2019 00:27:36 Reco wrote:
> > > > > On Sun, Jul 28, 2019 at 12:13:21AM -0400, Gene Heskett wrote:
> > > > > > > > That, and a whole restaraunt sized menu of dpkg stuff
> > > > > > > > for building packages is on the missing list. Grrrrr.
> > > > > > >
> > > > > > > apt install build-essential
> > > > > >
> > > > > > I *think* I did that. With synaptic. I gave it quite a list,
> > > > > > it took about an hour to install it all on a 100Mb circuit.
> > > > >
> > > > > If you're unsure if it's installed or not - you have bigger
> > > > > problems.
> > > > >
> > > > > > If it will boot normally I'll make sure.
> > > > >
> > > > > Why won't it?
> > > >
> > > > It gets to udev, and everything after that seem to take twice as
> > > > long as the last start, by the time it gets to MTD, whatever
> > > > that is, the blanker kicks in and nothing will wake it up. I
> > > > don't thinks its started ssh yet at that point, but its been 6
> > > > or so hours. Nope. No ssh answering the phone.
> > >
> > > Two options.
> > >
> > > 1) You want to solve the problem.
> > > Then it's "show, do not tell".
> > > Boot the kernel with the "debug" option, send journalctl output
> > > here.
> >
> > Where do I find that journalctl log?
>
> journalctl(1). Try it some day.
I did, looks like its reading /var/log/dmesg here on this stretch
install.
That doesn't tell what log I should pull off the pi's sd card when I get
its card mounted in here.
> > There not being a handy reset button on the pi makes me use the
> > power switch,
>
> I find it shocking that a man of your skill did not think about a
> low-voltage circuit-breaker between a power source and a Raspberry Pi.
>
History lesson Reco:
Circuit-breaker, not no, but hell no.
As a C.E.T. and retired broadcast engineer I am well aware of a circuit
breakers reliability problems. Even big ones can be a problem. A 3
phase Heinman rated at 40 amps once cost the tv transmitter I was in
charge of, a $125,000 klystron. It single phased a 10 hp water pump that
drove the cooling water at 70 gpm thru the bottom of a 4KM100-LA.
When we got a new tube, (Varian had to make it, about 7 weeks,) we also
installed a single phase detector that interrupted the beam power with a
couple 50 amp 100kv rated, Jennings vacuum relays. Way cheaper than a
$125,000 tube the next time a $90 breaker burned up a contact. Where we
put it, was downstream of the filer choke, so the normal 19,700 volts
shot up to a hair above 35,000 when they opened, but the 20,000 volt
oil-paper filter caps survived at nearly twice their rated voltage until
the safety bleeders pulled it back down. If one capacitor did fail, the
AK-225 beam power breaker slaved to the rest of the control ladder and
if not open by then, was well on its way to being tripped. So the short
circuit on Wayne County Public power was less then a full cycle in that
event. The building entrance breaker, a 1200 amp 3 phase, went down with
a sound like an 8 ga punt gun once the beam had burned a hole in the
collector bucket that water was supposed to be cooling. 20 milliseconds
maybe.
Too much resistance for a low voltage circuit, causes more trouble from
low voltage to the pi than they're worth. Plus they cost too much. A
common toggle switch I can rig in an hour or so once I find the switch,
and bring the soldering station within reach of the pi.
The switch mode psu's can be turned up to compensate but then the open
circuit voltage when the contacts close might be too much for the pi.
I'll use a switch.
> Reco
Cheers, Gene Heskett
--
"There are four boxes to be used in defense of liberty:
soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author)
If we desire respect for the law, we must first make the law respectable.
- Louis D. Brandeis
Genes Web page <http://geneslinuxbox.net:6309/gene>
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