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Pogoplug Series 4 green light keeps flashing

Posted by jasper 
Pogoplug Series 4 green light keeps flashing
March 15, 2017 07:29AM
I started the process to hack Pogoplug v4, but ended up appeared to be in an infinite loop problem. The green light in the front keeps blinking. I don't know Linux that well. Please help.

I started with a new Pogoplug v4 and connected via serial console. SSH cannot be activated. I first tried to backup the uBoot image in mtd0 with the command "nanddump --noecc --omitoob -l 0x80000 -f mtd0 /dev/mtd0", but returned with something like nanddump not found in /bin/sh error. I copied the screen session, but accidentally pasted it and somehow executed the whole "session". Now I ended up with the infinite loop issue.

How can I recover from this?

Your help is greatly appreciated.
open | download - session log.txt (12.6 KB)
Re: Pogoplug Series 4 green light keeps flashing
March 15, 2017 04:10PM

Your stock OS is messed up. So at this point, I would just try to install new u-boot and run Debian on USB drive. Is that's your intention, to hack this and run Debian?

1. Boot with UART using kwboot

- Download new u-boot from this thread:


- Also download kwboot (from the same u-boot thread)


Important Note: If possible, try to test this boot image with UART booting before flashing to NAND. See davygravy's UART booting using kwboot instruction here in this thread. The latest u-boot image released here should be used for UART booting, if your box is the type that supports it (these do not: Dockstar, Pogo E02, iConnect).

To download ARM kwboot binary for UART booting at Dropbox


kwboot (this is an older version)

- And run UART booting using davygravy instruction (mentioned above), using uboot.2016.05-tld-1.pogo_v4.mtd0.kwb that you've download.

2. Create Debian rootfs on USB from this thread:


Updated 20 Feb 2016:

This Debian-4.4.0-kirkwood-tld-1-rootfs-bodhi.tar.bz2 is to keep in sync with kernel Linux-4.4.0-kirkwood-tld-1.

Basic minimal Debian Kirkwood rootfs for most Kirwood plugs:

- tarball size: 137M
- install size: 398M
- a basic jessie rootfs.
- The init system used in this rootfs is sysvinit . To boot with systemd, see note 2 below.
- Installed packages: nano, avahi, ntp, busybox-syslogd (log to RAM), htop, isc-dhcp-client, dialog, bzip2, nfs server/client, iperf, ethtool, sysvinit-core, sysvinit, and sysvinit-utils.
- see LED controls in /etc/rc.local, and /etc/init.d/halt
- see some useful aliases in /root/.profile
- root password: root

3. Boot UART as in step 1, while the Debian rootfs 4.4 on USB (created in step 2) is plugged in.

When you get to this step, I'll take a look at the boot log and help booting it further.

latest Kirkwood kernel builds and rootfs
latest u-boot-kirkwood builds
latest Oxnas kernel builds and rootfs
latest u-boot-oxnas builds
latest MVEBU Armada kernel builds and rootfs
U-Boot & Kernel Booting process
bodhi's u-boot GitHub
bodhi's corner
Re: Pogoplug Series 4 green light keeps flashing
March 15, 2017 11:21PM
Thank you bodhi
I will give it a try and get back to you.

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