phablet-flash failed, but phone continued to reboot and install... doesnt sound too good. Don't know yet if it has any real impact on phone usability.
sudo phablet-flash ubuntu-system --channel daily-proposed
[sudo] password for asac:
INFO:phablet-flash:Device detected as maguro
INFO:urllib3.connectionpool:Starting new HTTPS connection (1): system-image.ubuntu.com
INFO:phablet-flash:Download directory set to /home/asac/Downloads/phablet-flash/imageupdates
INFO:phablet-flash:Downloading https://system-image.ubuntu.com/pool/ubuntu-66fb9ed004ea451885088c0e7e0438d0ec558d238713c5853ed51b625990b1f2.tar.xz to /home/asac/Downloads/phablet-flash/imageupdates/pool/ubuntu-66fb9ed004ea451885088c0e7e0438d0ec558d238713c5853ed51b625990b1f2.tar.xz
--2013-09-19 12:45:34-- https://system-image.ubuntu.com/pool/ubuntu-66fb9ed004ea451885088c0e7e0438d0ec558d238713c5853ed51b625990b1f2.tar.xz
Resolving system-image.ubuntu.com (system-image.ubuntu.com)... 91.189.88.35
Connecting to system-image.ubuntu.com (system-image.ubuntu.com)|91.189.88.35|:443... connected.
HTTP request sent, awaiting response... 200 OK
Length: 214264696 (204M) [application/x-tar]
Saving to: ‘/home/asac/Downloads/phablet-flash/imageupdates/pool/ubuntu-66fb9ed004ea451885088c0e7e0438d0ec558d238713c5853ed51b625990b1f2.tar.xz’
100%[=======================================================================>] 214,264,696 3.88MB/s in 60s
2013-09-19 12:46:34 (3.38 MB/s) - ‘/home/asac/Downloads/phablet-flash/imageupdates/pool/ubuntu-66fb9ed004ea451885088c0e7e0438d0ec558d238713c5853ed51b625990b1f2.tar.xz’ saved [214264696/214264696]
INFO:phablet-flash:Downloading https://system-image.ubuntu.com/devel-proposed/maguro/version-56.tar.xz to /home/asac/Downloads/phablet-flash/imageupdates/devel-proposed/maguro/version-56.tar.xz
--2013-09-19 12:46:35-- https://system-image.ubuntu.com/devel-proposed/maguro/version-56.tar.xz
Resolving system-image.ubuntu.com (system-image.ubuntu.com)... 91.189.88.35
Connecting to system-image.ubuntu.com (system-image.ubuntu.com)|91.189.88.35|:443... connected.
HTTP request sent, awaiting response... 200 OK
Length: 348 [application/x-tar]
Saving to: ‘/home/asac/Downloads/phablet-flash/imageupdates/devel-proposed/maguro/version-56.tar.xz’
100%[=======================================================================>] 348 --.-K/s in 0s
2013-09-19 12:46:36 (5.41 MB/s) - ‘/home/asac/Downloads/phablet-flash/imageupdates/devel-proposed/maguro/version-56.tar.xz’ saved [348/348]
INFO:phablet-flash:Downloading https://system-image.ubuntu.com/gpg/image-master.tar.xz to /tmp/tmpScucRe/image-master.tar.xz
--2013-09-19 12:46:36-- https://system-image.ubuntu.com/gpg/image-master.tar.xz
Resolving system-image.ubuntu.com (system-image.ubuntu.com)... 91.189.88.35
Connecting to system-image.ubuntu.com (system-image.ubuntu.com)|91.189.88.35|:443... connected.
HTTP request sent, awaiting response... 200 OK
Length: 884 [application/x-tar]
Saving to: ‘/tmp/tmpScucRe/image-master.tar.xz’
100%[=======================================================================>] 884 --.-K/s in 0s
2013-09-19 12:46:36 (29.8 MB/s) - ‘/tmp/tmpScucRe/image-master.tar.xz’ saved [884/884]
INFO:phablet-flash:Downloading https://system-image.ubuntu.com/gpg/image-signing.tar.xz to /tmp/tmpScucRe/image-signing.tar.xz
--2013-09-19 12:46:36-- https://system-image.ubuntu.com/gpg/image-signing.tar.xz
Resolving system-image.ubuntu.com (system-image.ubuntu.com)... 91.189.88.35
Connecting to system-image.ubuntu.com (system-image.ubuntu.com)|91.189.88.35|:443... connected.
HTTP request sent, awaiting response... 200 OK
Length: 904 [application/x-tar]
Saving to: ‘/tmp/tmpScucRe/image-signing.tar.xz’
100%[=======================================================================>] 904 --.-K/s in 0s
2013-09-19 12:46:36 (29.3 MB/s) - ‘/tmp/tmpScucRe/image-signing.tar.xz’ saved [904/904]
INFO:phablet-flash:Downloading https://system-image.ubuntu.com/pool/ubuntu-66fb9ed004ea451885088c0e7e0438d0ec558d238713c5853ed51b625990b1f2.tar.xz.asc to /home/asac/Downloads/phablet-flash/imageupdates/pool/ubuntu-66fb9ed004ea451885088c0e7e0438d0ec558d238713c5853ed51b625990b1f2.tar.xz.asc
--2013-09-19 12:46:36-- https://system-image.ubuntu.com/pool/ubuntu-66fb9ed004ea451885088c0e7e0438d0ec558d238713c5853ed51b625990b1f2.tar.xz.asc
Resolving system-image.ubuntu.com (system-image.ubuntu.com)... 91.189.88.35
Connecting to system-image.ubuntu.com (system-image.ubuntu.com)|91.189.88.35|:443... connected.
HTTP request sent, awaiting response... 200 OK
Length: 490 [text/plain]
Saving to: ‘/home/asac/Downloads/phablet-flash/imageupdates/pool/ubuntu-66fb9ed004ea451885088c0e7e0438d0ec558d238713c5853ed51b625990b1f2.tar.xz.asc’
100%[=======================================================================>] 490 --.-K/s in 0s
2013-09-19 12:46:36 (7.59 MB/s) - ‘/home/asac/Downloads/phablet-flash/imageupdates/pool/ubuntu-66fb9ed004ea451885088c0e7e0438d0ec558d238713c5853ed51b625990b1f2.tar.xz.asc’ saved [490/490]
INFO:phablet-flash:Downloading https://system-image.ubuntu.com/pool/device-38c8b1e634a1312dbff8454dfda3adec65fa173dd1312e02e9209fd31d5643c9.tar.xz.asc to /home/asac/Downloads/phablet-flash/imageupdates/pool/device-38c8b1e634a1312dbff8454dfda3adec65fa173dd1312e02e9209fd31d5643c9.tar.xz.asc
--2013-09-19 12:46:36-- https://system-image.ubuntu.com/pool/device-38c8b1e634a1312dbff8454dfda3adec65fa173dd1312e02e9209fd31d5643c9.tar.xz.asc
Resolving system-image.ubuntu.com (system-image.ubuntu.com)... 91.189.88.35
Connecting to system-image.ubuntu.com (system-image.ubuntu.com)|91.189.88.35|:443... connected.
HTTP request sent, awaiting response... 416 Requested Range Not Satisfiable
The file is already fully retrieved; nothing to do.
INFO:phablet-flash:Downloading https://system-image.ubuntu.com/devel-proposed/maguro/version-56.tar.xz.asc to /home/asac/Downloads/phablet-flash/imageupdates/devel-proposed/maguro/version-56.tar.xz.asc
--2013-09-19 12:46:36-- https://system-image.ubuntu.com/devel-proposed/maguro/version-56.tar.xz.asc
Resolving system-image.ubuntu.com (system-image.ubuntu.com)... 91.189.88.35
Connecting to system-image.ubuntu.com (system-image.ubuntu.com)|91.189.88.35|:443... connected.
HTTP request sent, awaiting response... 200 OK
Length: 490 [text/plain]
Saving to: ‘/home/asac/Downloads/phablet-flash/imageupdates/devel-proposed/maguro/version-56.tar.xz.asc’
100%[=======================================================================>] 490 --.-K/s in 0s
2013-09-19 12:46:36 (7.13 MB/s) - ‘/home/asac/Downloads/phablet-flash/imageupdates/devel-proposed/maguro/version-56.tar.xz.asc’ saved [490/490]
INFO:phablet-flash:Downloading https://system-image.ubuntu.com/gpg/image-master.tar.xz.asc to /tmp/tmpScucRe/image-master.tar.xz.asc
--2013-09-19 12:46:36-- https://system-image.ubuntu.com/gpg/image-master.tar.xz.asc
Resolving system-image.ubuntu.com (system-image.ubuntu.com)... 91.189.88.35
Connecting to system-image.ubuntu.com (system-image.ubuntu.com)|91.189.88.35|:443... connected.
HTTP request sent, awaiting response... 200 OK
Length: 836 [text/plain]
Saving to: ‘/tmp/tmpScucRe/image-master.tar.xz.asc’
100%[=======================================================================>] 836 --.-K/s in 0s
2013-09-19 12:46:36 (37.5 MB/s) - ‘/tmp/tmpScucRe/image-master.tar.xz.asc’ saved [836/836]
INFO:phablet-flash:Downloading https://system-image.ubuntu.com/gpg/image-signing.tar.xz.asc to /tmp/tmpScucRe/image-signing.tar.xz.asc
--2013-09-19 12:46:36-- https://system-image.ubuntu.com/gpg/image-signing.tar.xz.asc
Resolving system-image.ubuntu.com (system-image.ubuntu.com)... 91.189.88.35
Connecting to system-image.ubuntu.com (system-image.ubuntu.com)|91.189.88.35|:443... connected.
HTTP request sent, awaiting response... 200 OK
Length: 490 [text/plain]
Saving to: ‘/tmp/tmpScucRe/image-signing.tar.xz.asc’
100%[=======================================================================>] 490 --.-K/s in 0s
2013-09-19 12:46:36 (7.48 MB/s) - ‘/tmp/tmpScucRe/image-signing.tar.xz.asc’ saved [490/490]
INFO:phablet-flash:Saving backup to /tmp/tmpFgCOnA
INFO:phablet-flash:Pulling /tmp/backup.tar.gz to /tmp/tmpFgCOnA
3562 KB/s (2005272 bytes in 0.549s)
INFO:phablet-flash:Decompressing partitions/recovery.img from /home/asac/Downloads/phablet-flash/imageupdates/pool/device-38c8b1e634a1312dbff8454dfda3adec65fa173dd1312e02e9209fd31d5643c9.tar.xz
INFO:phablet-flash:Restarting device... wait
INFO:phablet-flash:Restarting device... wait complete
INFO:phablet-flash:Booting /tmp/tmpuX6QeV/partitions/recovery.img
< waiting for device >
downloading 'boot.img'...
FAILED (data transfer failure (Protocol error))
finished. total time: 0.735s
ERROR:phablet-flash:Command 'fastboot boot /tmp/tmpuX6QeV/partitions/recovery.img' returned non-zero exit status 1
Removing directory /tmp/tmpuX6QeV
Removing directory /tmp/tmpScucRe
So fastboot said it failed but succeeded anyways?
fyi, the failure you got is generally a hw related one.