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Egor · 09-23-2017, 09:23 AM

Hi Guys!

Sorry, it took me for a while to setup everything correctly, so let me post the history - it may be useful for someone.

Issue 1:
I have found out that the fastboot entering issue was caused by Windows. So every time, when I move Kindle PW2 (connected via both USB and TTL) to fastboot by bist fastboot command, it tried to install a new device and kicked off the kindle from fastboot.
Resolution 1: I fixed this by switching to Ubuntu.

Issue 2:
Now I'm able to enter fastboot, but ./fastboot *command* hangs with <waiting for device>
Resolution 2: I used sudo ./fastboot *command* and it works

Issue 3:
I do the following commands:

Code:

sudo ./fastboot flash diags mmcblk0p2.bin
sudo ./fastboot flash diags_kernel diags_kernel.img
sudo ./fastboot flash kernel main_kernel.img
sudo ./fastboot setvar bootmode diags
sudo ./fastboot reboot

And see positive feedback from Kindle:

Code:

bist > fastboot 
Entering fastboot mode... 
USB speed: HIGH 
Connected to USB host!
USB speed: HIGH 
Connected to USB host!
downloading
..done 
flashing diags to MMC1, partition 0
Battery voltage: 4016 mV 
downloading 
done 
flashing diags_kernel to MMC1, partition 0
done. 
Battery voltage: 4019 mV 
downloading 
done 
flashing kernel to MMC1, partition 0
done. 
resetting ...

However, then I do not see DIAGS menu, the kindle just loads as usual and asks about entering into bist or recovery menu.
I have an assumption, that my kindle does not go into diags mode for some reason. I have started to test this assumption and see the following:
While in uboot, I do idme and see

Code:

bootmode: ota

Then I do idme bootmode diags and see

Code:

setting 'bootmode' to 'diags'

but idme still returns

Code:

bootmode: ota

If I try to execute: bootm 0xE41000, Kindle goes to reboot, but it still doesn't load DIAGS menu. Instead I see the following:

Code:

mmcblk0: error -110 transferring data, sector 1044480, nr 32n cm0
mmcblk0: retrying using single block read
...
kinit: Cannot open root device dev(179,2)
kinit: init not found!

Also I run sudo ./fastboot check diags and it returns:

Code:

checking 'diags'...
FAILED (remote: unknown command)
finished. total time: 0.000s

Not sure what it means, maybe it can be useful for you.

Resolution 3 (in progress): I think that my Kindle cannot boot DIAGS mode for some reason or it cannot switch the boot mode to DIAGS. Any ideas how to fix it?

Thank you for your help!

09-23-2017, 09:23 AM	#9
Egor Junior Member Posts: 9 Karma: 10 Join Date: Sep 2017 Device: PW2	Hi Guys! Sorry, it took me for a while to setup everything correctly, so let me post the history - it may be useful for someone. Issue 1: I have found out that the fastboot entering issue was caused by Windows. So every time, when I move Kindle PW2 (connected via both USB and TTL) to fastboot by bist fastboot command, it tried to install a new device and kicked off the kindle from fastboot. Resolution 1: I fixed this by switching to Ubuntu. Issue 2: Now I'm able to enter fastboot, but ./fastboot command hangs with <waiting for device> Resolution 2: I used sudo ./fastboot command and it works Issue 3: I do the following commands: Code: sudo ./fastboot flash diags mmcblk0p2.bin sudo ./fastboot flash diags_kernel diags_kernel.img sudo ./fastboot flash kernel main_kernel.img sudo ./fastboot setvar bootmode diags sudo ./fastboot reboot And see positive feedback from Kindle: Code: bist > fastboot Entering fastboot mode... USB speed: HIGH Connected to USB host! USB speed: HIGH Connected to USB host! downloading ..done flashing diags to MMC1, partition 0 Battery voltage: 4016 mV downloading done flashing diags_kernel to MMC1, partition 0 done. Battery voltage: 4019 mV downloading done flashing kernel to MMC1, partition 0 done. resetting ... However, then I do not see DIAGS menu, the kindle just loads as usual and asks about entering into bist or recovery menu. I have an assumption, that my kindle does not go into diags mode for some reason. I have started to test this assumption and see the following: While in uboot, I do idme and see Code: bootmode: ota Then I do idme bootmode diags and see Code: setting 'bootmode' to 'diags' but idme still returns Code: bootmode: ota If I try to execute: bootm 0xE41000, Kindle goes to reboot, but it still doesn't load DIAGS menu. Instead I see the following: Code: mmcblk0: error -110 transferring data, sector 1044480, nr 32n cm0 mmcblk0: retrying using single block read ... kinit: Cannot open root device dev(179,2) kinit: init not found! Also I run sudo ./fastboot check diags and it returns: Code: checking 'diags'... FAILED (remote: unknown command) finished. total time: 0.000s Not sure what it means, maybe it can be useful for you. Resolution 3 (in progress): I think that my Kindle cannot boot DIAGS mode for some reason or it cannot switch the boot mode to DIAGS. Any ideas how to fix it? Thank you for your help!