Ubuntu server on raspi 3, poweroff.. how to reboot?

Question

I grabbed an iso of ubuntu 16 for raspi 3 from here: https://ubuntu-pi-flavour-maker.org/download/

I ssh'd in with ubuntu, set a password.

Ran apt-get update && apt-get upgrade

All good so far.

Then I ran poweroff, great, the raspi appears to powerdown... leave it a bit but the leds are still on and red.

Leave for a total of about 4 mins.. led is still solid red.

Disconnect the lan and usb, leave for a bit.

Plug the lan and then the power source back in, but this time the little guys isn't booting up, the led is just solid red with nothing else.

Is there a way to boot a raspi without buying this powerswitch? It's Easter and the shops aint open till Tuesday.. :/

UPDATE Here is a snapshot of the little pi trying to boot up while connected to a screen.

If you can make out the image the first main error seems to be

No FDT memory address configured. Please configure the FDT address via "fdt add " command.

Then following with

ERROR: Did not find a cmbline Flattened Device Tree

UPDATE After some further reading it seams the iso i used (https://wiki.ubuntu.com/ARM/RaspberryPi) is not supported by cononical. I am now trying the https://developer.ubuntu.com/core/get-started/raspberry-pi-2-3 version.

That powerswitch would only save you the replugging of the USB cable. You seem to have another problem with your system not booting at all — mystery, Apr 16, 2017 at 22:13
You don't say exactly which dist you used, but MATE should work. Unfortunately Pi crashes on upgrade are not uncommon - just bad luck. I always make a backup first. I suggest you try again. — Milliways, Apr 17, 2017 at 1:19
I choose this dist: "Ubuntu Classic Server 16.04 Raspberry Pi 3 (216MB)" I think i will have to get a screen hooked up and see what is happening during boot. — John, Apr 17, 2017 at 10:20
The latest link is Snappy Ubuntu Core which is probably NOT what you want (unless you are developing snap-ins). The MATE download from ubuntu-mate.org/raspberry-pi works without any problems. I have used earlier versions of Ubuntu Classic Server, which are OK if you want a server. NONE of the distributions for Pi (except Snappy) are supported by Canonical, they are user ports. — Milliways, Apr 18, 2017 at 1:55

pin_ptr · Accepted Answer · 2017-04-18 00:27:31Z

0

How about editing 'config.txt' on MicroSD like my answer? https://raspberrypi.stackexchange.com/a/62384/62515

# original
device_tree_address=0x100
device_tree_end=0x8000

# modified
device_tree_address=0x02008000

answered Apr 18, 2017 at 0:27

pin_ptr

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