On Sun, Jun 23, 2019, 8:35 PM Evan Leibovitch via talk <talk@gtalug.org> wrote:

Hi all.

I'm trying to determine if my Nexus 7 tablet (original 2012 version) is toast or can be fixed by software.

Since its OS stopped being upgraded in 2015, I'd installed LineageOS on it some time ago. A few months ago when I went to upgrade, the install from TWRP didn't take and it just bootlooped on the Lineage animation about 15 seconds in.

Was it the latest version of TWRP?

After trying a bunch of things I decided to just erase the whole thing and take it to factory settings. So, using these instructions, I downloaded the factory ROM and tried to install.

Here's what happened when executing the supplied install script:

fastboot oem unlock
(bootloader) Bootloader is already unlocked
OKAY [ 0.015s]
finished. total time: 0.015s
fastboot erase boot
erasing 'boot'...
OKAY [ 0.015s]
finished. total time: 0.015s
fastboot erase cache
******** Did you mean to fastboot format this ext4 partition?
erasing 'cache'...
OKAY [ 0.015s]
finished. total time: 0.015s
fastboot erase recovery
erasing 'recovery'...
OKAY [ 0.015s]
finished. total time: 0.015s
fastboot erase system
******** Did you mean to fastboot format this ext4 partition?
erasing 'system'...
OKAY [ 0.015s]
finished. total time: 0.015s
fastboot erase userdata
******** Did you mean to fastboot format this ext4 partition?
erasing 'userdata'...
OKAY [ 0.026s]
finished. total time: 0.026

fastboot -w update image-nakasi-ktu84p.zip
target didn't report max-download-size
sending 'bootloader' (2100 KB)...
OKAY [ 0.262s]
writing 'bootloader'...
OKAY [ 0.601s]
finished. total time: 0.863s
rebooting into bootloader...
OKAY [ 0.015s]
finished. total time: 0.065s
extracting android-info.txt (0 MB)...
extracting boot.img (4 MB)...
target didn't report max-download-size

The archive doesn't sign correctly.

archive does not contain 'boot.sig'
archive does not contain 'dtbo.img'

The link below mentions a problem with dtbo.img.

archive does not contain 'dt.img'
extracting recovery.img (5 MB)...
archive does not contain 'recovery.sig'
extracting system.img (628 MB)...
archive does not contain 'system.sig'
archive does not contain 'vbmeta.img'
archive does not contain 'vendor.img'
wiping userdata...
Couldn't parse erase-block-size '0x'.
Couldn't parse logical-block-size '0x'.

mke2fs 1.44.6 (5-Mar-2019)
/tmp/TemporaryFile-fnXNLB:

Looks like the install script was out of date and wasn't linking things correctly.

Unimplemented ext2 library function while setting up superblock
/usr/lib/android-sdk/platform-tools/mke2fs failed with status 1
mke2fs failed: 1
error: Cannot generate image for userdata

At this point, if it's not bricked, it looks a bit more like software to me. A little research found similar problems.

https://forum.xda-developers.com/pixel/help/mke2fs-error-flash-factory-images-pixel-t3734828

Sideloading using adb is what I used to put a PixelExperience rom on my Nexus 6. I went through Carbon and Lineage first.

This discussion says there is a problem with fastboot mke2fs sllocating the superblock in Debian.

https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=924591

Does this mean I have a hardware problem? I suspect if it is, the fix will be well more than the tablet is worth. Well, at least I know it's *probably* been wiped of any useful data,

And yes, I've tried multiple ports, cables images and even systems.

Thanks!

I wouldn't toss it yet.

HTH

--
Evan Leibovitch, Toronto Canada
@evanleibovitch or @el56
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