ubuntu-device-flash silently does not flash

[Zoltan Balogh]

My mako device has the rev203 flashed.

I do this ->

adb -s ${SERIALNUMBER} reboot-bootloader
ubuntu-device-flash --serial=${SERIALNUMBER} --channel=ubuntu-touch/utopic-proposed --wipe --bootstrap
adb -s ${SERIALNUMBER} wait-for-device
phablet-config -s ${SERIALNUMBER} welcome-wizard --disable
phablet-config -s ${SERIALNUMBER} edges-intro --disable

The flashing process gives this output -> http://pastebin.ubuntu.com/8116521/

After the flash, the device is still on the rev203.

A consider this as a critical security issue, as this method is used when the release candidate packages are validated before landing them.

The device I am using is flashed 10+ times a day.

What I need here are the following:

1) when the flashing is not successful then the tool should return with failure. Probably a simple post processing test tool to validate the flashing.

2) A tool or a written guide to factory reset/clean up the device. I have cleaned up the chaches in Recovery mode, used the UI "Factory reset" without result.

[Zoltan Balogh (bzoltan)]

Checking the recovery logs there was a bogus directory structure (?) under the /userdata/user-data/phablet/.cache/com.ubuntu.gallery/ what messed up the flashing.

Removing that directory made the flashing work.

Still the falsher should not just fail silently.

[Sergio Schvezov (sergiusens)]

It seems rm can't read that deep into filenames while in recovery and bails on "format data". This isn't a problem in properly partitioned devices as the partition is actually formatted instead of rm'ed