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Re: Soft-bricked Nexus 7 with Ubuntu Phone

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On 07/25/2013 10:32 AM, Cyrille Ngassam Nkwenga wrote:


If the device is in bootloader mode,
You should run : sudo fastboot devices to detect the device. Adb doesn't work when in bootloader mode
Am 25.07.2013 19:28 schrieb "Cyrille Ngassam Nkwenga" <cyrildz@xxxxxxxxx <mailto:cyrildz@xxxxxxxxx>>: 

    Just a note, you should run fastboot as root , so sudo fastboot ...

    Am 25.07.2013 19:19 schrieb "András Mamenyák" <mamenyaka@xxxxxxxxx
    <mailto:mamenyaka@xxxxxxxxx>>:

        Follow this guide
        <http://developer.android.com/tools/device.html> (from step
        3) to make your device detection work.
        You should just copy over the two .zip files, then flash .zip
        from sdcard in recovery.


        On Thu, Jul 25, 2013 at 7:15 PM, John Kim
        <johnkim.ubuntu@xxxxxxxxx <mailto:johnkim.ubuntu@xxxxxxxxx>>
        wrote:

            On 07/25/2013 10:09 AM, Daniel wrote:

            Am 25.07.2013 19:03, schrieb John Kim:

            On 07/25/2013 09:45 AM, András Mamenyák wrote:

            Hi!
            You should use fastboot in fastboot mode, not adb.
            And you should simply reboot into recovery and flash
            the ubuntu files (you have adb there too)


            On Thu, Jul 25, 2013 at 6:32 PM, John Kim
            <johnkim.ubuntu@xxxxxxxxx
            <mailto:johnkim.ubuntu@xxxxxxxxx>> wrote:

                Hello all,

                My name is John Kim, a newcomer to the Ubuntu Phone
                community, and I contribute to Ubuntu Docs and
                Quality team.  For the Quality team, I intend to
start writing automated testcases for core apps. My first task will be the music-app. 

                My development environment is complete.  I
                installed the Ubuntu SDK and Qt Creator on my 13.10
                laptop, and I successfully installed Ubuntu Phone
                into my Nexus 7 as well as SSH to it.  I personally
                prefer to ssh over USB than over IP because it's
                just faster.

                Normally, after minutes of inactivity, my Nexus 7
                will power off on its own.  I can power again after
                holding the power button for a moment.  But as soon
                as I ran the music-app testcases with my Nexus 7
                plugged in (QtCreator recognized it and set the
                device as development), which failed, my Nexus 7
                was missing a music and video app icon. *When it
                powered down, my Nexus 7 would get stuck
                perpetually in the Google screen with the unlocked
                lock image at the bottom. * The only way I could
                turn it off was hold the power and the volume down
                button, and go to "Power Off"; otherwise, my Nexus
                7 will reboot back to the boot screen over and over
                again.

                I would like to know how I can restore my device
                with a fresh Ubuntu Phone build.  I haven't tried
                yet, but I'm quite sure that 'adb devices' won't
                recognize my Nexus 7 on neither the fastboot mode
                nor the Google screen.

                Thanks!
-- John Kim 
                Ubuntu QA & Doc Contributor
                johnkim.ubuntu@xxxxxxxxx  <mailto:johnkim.ubuntu@xxxxxxxxx>


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            Hi!

            I entered fastboot mode, but running 'fastboot devices'
            shows nothing.
            On recovery mode, 'sudo adb kill-server; sudo adb
            start-server; adb devices' shows no devices as well,
            even when I start sideload.

            How exactly do I flash ubuntu files?
-- John Kim 
            Ubuntu QA & Doc Contributor
            johnkim.ubuntu@xxxxxxxxx  <mailto:johnkim.ubuntu@xxxxxxxxx>



            what is the output of
            lsusb
            or
            dmesg | tail



            Hi Daniel,

            The outputs of lsusb and dmesg are...

                *john@kotux:~$ lsusb*
                Bus 001 Device 002: ID 8087:0024 Intel Corp.
                Integrated Rate Matching Hub
                Bus 002 Device 002: ID 8087:0024 Intel Corp.
                Integrated Rate Matching Hub
                Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0
                root hub
                Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0
                root hub
                Bus 001 Device 003: ID 04f2:b217 Chicony Electronics
                Co., Ltd Lenovo Integrated Camera (0.3MP)
                Bus 002 Device 017: ID 18d1:4e40 Google Inc.
                *john@kotux:~$ dmesg | tail*
                [51516.226040] cfg80211:   (5735000 KHz - 5835000 KHz
                @ 40000 KHz), (300 mBi, 3000 mBm)
                [54988.705131] kvm: disabled by bios
                [54988.713699] kvm: disabled by bios
                [55663.698675] systemd-hostnamed[4006]: Warning:
                nss-myhostname is not installed. Changing the local
                hostname might make it unresolveable. Please install
                nss-myhostname!
                [56352.199773] usb 2-1.2: new high-speed USB device
                number 17 using ehci-pci
                [56352.293273] usb 2-1.2: New USB device found,
                idVendor=18d1, idProduct=4e40
                [56352.293285] usb 2-1.2: New USB device strings:
                Mfr=1, Product=2, SerialNumber=3
                [56352.293290] usb 2-1.2: Product: Android
                [56352.293295] usb 2-1.2: Manufacturer: Google, Inc
                [56352.293300] usb 2-1.2: SerialNumber: 015d2****

            From the warning, should I install nss-myhostname?
-- John Kim 
            Ubuntu QA & Doc Contributor
            johnkim.ubuntu@xxxxxxxxx  <mailto:johnkim.ubuntu@xxxxxxxxx>


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Hello all,
It's safe to say that I have finally resolved my issue, and surprisingly, it didn't involve 'fastboot.' Fastboot just didn't work because recovery zips wouldn't push into the device, and 'adb push' wouldn't work either because /sdcard didn't show up on the system (how many times I tried!).
Fortunately, I realized I could use 'adb sideload <filename>'. I first went to the cdimage site for the today's build and downloaded the two zips. It is strange that my first installation only had one zip. Then, I rebooted to recovery and pressed the option 'Install zip from sideload'. After cd-ing into the directory with my zips (I moved them from ~/Downloads), I followed the manual installation instructions from the ReleaseNotes wiki page, minus the 'adb push' part.
Many thanks to Cyrille and András for helping me out. I am glad that my Nexus 7 is back in shape for more Ubuntu touch love. Later, I'm going to update the page later to reflect this solution. 

--
John Kim
Ubuntu QA & Doc Contributor
johnkim.ubuntu@xxxxxxxxx

References

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