05-10-2020, 09:10 AM | #1 |
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Device: kindle pw2 PaperWhite 2 , KT2 - BASIC, Kindle 3 WiFi and a K3W
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unbricking or something with serial only access
Hi all,
I have a pw2 serial starting 9017*** which fails to boot completely the screen stays lit. So soldered a serial cable on and have fastboot working complied from source. I been at this a few days seem to remember flashing over fastboot something and was asking for login at one point which it does not seem to be for the moment I kind of feel like I walking backwards what I can do: Set up: on linux: run script logfile.txt then: screen /dev/ttyUSB0 115200 1. start with serial, no usb then reboot the pw2, interrupt by pressing a key early in boot, enter uboot: U-Boot 2009.08-lab126 (Apr 23 2014 - 01:01:24) bist mmcinfo gives: Spoiler:
2. interrupt by pressing a key later in boot and getting the menu: Spoiler:
letting it continue, with out pressing anything it halts at: Spoiler:
3. sudo ./fastboot setvar bootmode diags_kernel or diags, halts at same place as above bootmode kernel gives: Spoiler:
4. connected to USB port get the menu above: Pressing E mounts for about 30s-1m USB the pw2 containing documents and system. So anyway ... I been at this for a few days, think I should try again somehow flashing the mmcblk0p1.bin, mmcblk0p2.bin, main_kernel.img, diags_kernel.img from kindle_pw2_jb_5.4.0 or something else? can you load MMC over serial kind of think I going down a long rabbit hole here... |
05-10-2020, 01:49 PM | #2 |
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OK I maybe barking up the wrong tree, but I have an idea , could I do something like:
Code:
kindletool create ota --device paperwhite2 --platform wario --board unspecified diags_kernel.img main_kernel.img mmcblk0p1.bin mmcblk0p2.bin update_pw2_jb_5.4.0.bin |
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05-10-2020, 01:56 PM | #3 |
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Or use the menu "Update using update*.bin file on FAT partition" ?
Spoiler:
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05-10-2020, 02:17 PM | #4 |
Wizard
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At first, try press E (Export FAT partition), copy there firmware update file and reboot the device.
As you can see the usb-disk for about a minute only, it may require some incremental copy (KillCopy, FAR manager or another program). |
05-10-2020, 06:18 PM | #5 |
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Thanks hius07,
I made an update.bin packaged with kindletool but got a message about not having a script file so it would do nothing! and while I don't mind having to write a script I not have much idea of what I need to do, maybe dd from somewhere the images? So I left that idea. Then I tried copying the fileupdate_PW2_5.4.3.2_initial.bin but only got 57mb and its 376mb. then tried using rsync with the --append option but getting some mmc errors end_request: I/O error, dev mmcblk0, sector 6125645 mmcblk0: timed out sending r/w cmd command, card status 0x400b00 I am wondering what a format of FAT would do or something .... |
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05-10-2020, 11:12 PM | #6 |
Wizard
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Seems you've got a fatal problem with memory.
Anyway, if you manage to format it, try Amazon firmware file, it's about 200 MB https://s3.amazonaws.com/firmwaredow..._v2_5.12.2.bin Or the last jailbreakable version 5.8.7.0.1 (just replace 5.12.2 in the link). Last edited by hius07; 05-10-2020 at 11:14 PM. |
05-11-2020, 12:31 PM | #7 |
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Thanks hius07,
I got v2_5.122.2.bin 215mb still seems like a lot so I decompressed, mounted and had a look around.. it looks like fonts.sqsh is about 81mb, could I remove some fonts Spoiler:
Fonts in fonts.sqsh Spoiler:
I coming to conclusion it may be mmc memory problem, maybe need a replacement chip or pcb! Been reading this great article translation of https://www.zephray.me/post/kpw2_debrick_1 |
05-11-2020, 01:48 PM | #8 |
BLAM!
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You can't repack anything, custom or official. Otherwise we wouldn't have to jump through fiery hoops for a JB.
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Tags |
pw2 brick fastboot kernel, serial, uboot |
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