New Nook Glowlight 4?

[Renate]

When you're switching between ADB/fastboot/EDL it's helpful to see stuff pop up/disappear.
You can run UsbLog.exe and it will show you.
Note that if you see something disappear and its replacement does not appear look to see if it did reappear as something but there is no driver installed.
http://www.temblast.com/windows.htm

[keitaro26]

I was able to get past my previous problem, it was the drivers. Had to roll back to 1.3. However now the nook won't boot at all. Boot img attached.

[keitaro26]

Tried a factory reset, still won't boot.

[Renate]

Did you try flashing the original boot.img? It's in the update.
Does recovery have any useful options? Do you want a recovery with rooted ADB?

[keitaro26]

Recovery only had a factory reset option, which I tried. Now it doesn't even show up in USBView when I plug it in and no ADB access. Any other things I could try? Doesn't matter if its rooted or not, just want to get it booting again.

[Renate]

Ok, can you still get to fastboot? If so, here's how to proceed, carefully.
If something doesn't react as portrayed, stop!

Preparation

Download http://su.barnesandnoble.com/nook/pi...1/gentoo/3.123

Download nnglow21.img from http://www.temblast.com/neonoogie.htm

Get misc-rec.prc from attachment. Just rename it plain misc-rec

Install rooted recovery

Go to fastboot:

C:\>fastboot flash recovery nnglow21.img
C:\>fastboot flash misc misc-rec

Long power press to reset, you should see a splash with "Neo Noogie".

Install update

C:\>adb shell
# mount -t f2fs /dev/block/by-name/UDISK /data
# mount -t ext4 /dev/block/by-name/cache /cache
# ^D
C:\>adb push update.zip /data/media/0
C:\>adb shell
# update-binary 2 1 /data/media/0/update.zip
<lots of printing, should end happily>
# dd if=/dev/zero of=/dev/block/by-name/misc
dd: /dev/block/by-name/misc: write error: No space left on device <not a problem, correct>

^D is control key + d

Hit the power button (which has "Reboot normally" written under it)
If that doesn't work do a really long power press ~30 seconds.

[keitaro26]

Unfortunately, my computer doesn't even register that is it being plugged or unplugged. The first command only returns "<waiting for any device>".

[Renate]

Yeah, but you had fastboot a minute ago???

Does the charging light go on when you plug it in?
Leave it charging in any case.
Have you tried another Type C device on this cable?
You're saying that Windows takes no notice, no "bongs", no error messages when you plug it in?
You don't see a VID/PID of 1f3a/efe8 in UsbView?

Device Descriptor:
bcdUSB:             0x0110
bDeviceClass:         0x00
bDeviceSubClass:      0x00
bDeviceProtocol:      0x00
bMaxPacketSize0:      0x40 (64)
idVendor:           0x1F3A
idProduct:          0xEFE8
bcdDevice:          0x02B3
iManufacturer:        0x00
iProduct:             0x00
iSerialNumber:        0x00
bNumConfigurations:   0x01

Have you tried a long ~30 second power press?

[keitaro26]

I had Fastboot working before I tried the factory reset, but now it does not register at all. I've tried multiple cables, and the charge light does turn on when plugged in, but Windows does not make the device connected sound and nothing shows up in the device manager or on USBviewer.

30-second long press makes the screen flash like it is rebooting, but nothing else changes.

[Renate]

Mmm, then that means that things are working well enough that it's not going to the ROM bootloader, but bad enough that it's not going anywhere.

I don't really have that much interest in Allwinner/Glow '21, but I took it apart looking for the test points to put it into FEL mode (analogous to Qualcomm EDL mode). I couldn't find any, but the u-boot does accept the "efex" command which puts it into FEL mode. I wrote a proof-of-concept FEL client and that works:

C:\>allwin
Found FEL device
AWUSBFEX 00175500 00000001 0001
Model sun8iw15

You're shooting in the dark, at the least you need to hook up a 3.3V UART to get some feedback on what it's doing.
It's the through-hole connector on the left, from the top, Gnd, RX (in), TX (out), 3.3V.
If you're lucky, you can stop the boot and put it into fastboot.
Still, to go any further with that you'd have to get your device into FEL mode and you'd need a real FEL/FES client.
https://github.com/linux-sunxi/sunxi-tools