PW2 unbricking or something with serial only access

Mini9 · 05-10-2020, 09:10 AM

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...

Mini9 · 05-10-2020, 01:49 PM

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

and then place the .bin on in the documents folder to repair the system, or is that too easy

? anyone any ideas?

Mini9 · 05-10-2020, 01:56 PM

Or use the menu "Update using update*.bin file on FAT partition"

?

Spoiler:

hius07 · 05-10-2020, 02:17 PM

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).

Mini9 · 05-10-2020, 06:18 PM

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 ....

hius07 · 05-10-2020, 11:12 PM

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).

Mini9 · 05-11-2020, 12:31 PM

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

NiLuJe · 05-11-2020, 01:48 PM

You can't repack anything, custom or official. Otherwise we wouldn't have to jump through fiery hoops for a JB.

05-10-2020, 09:10 AM	#1
Mini9 almost here... Posts: 5 Karma: 10 Join Date: May 2020 Device: kindle pw2 PaperWhite 2 , KT2 - BASIC, Kindle 3 WiFi and a K3W	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: Card did not respond to voltage select! Device: FSL_ESDHC Manufacturer ID: 0 OEM: 0 Name: Revision: 0x0 Tran Speed: 0 Rd Block Len: 0 MMC version 0.0 High Capacity: No Capacity: 0 Bus Width: 1-bit Current Partition for boot: Not bootable Current boot width: 1-bit SDR 2. interrupt by pressing a key later in boot and getting the menu: Spoiler*: Menu ==== 3. Load MMC0 over USB storage 4. Erase MMC0 I. Initialize Partition Table (fdisk) and format FAT O. Format and overwrite FAT partition E. Export FAT partition U. Update using update.bin file on FAT partition M. Update using update.bin file on FAT partition of second MMC port D. dmesg / kernel printk ring buffer. Q. quit letting it continue, with out pressing anything it halts at: Spoiler: BOOTING DEFAULT. IP-Config: no devices to configure [ 8.032768] EXT3-fs (mmcblk0p2): recovery required on readonly filesystem [ 8.039625] EXT3-fs (mmcblk0p2): write access will be enabled during recovery [ 8.047506] EXT3-fs: barriers not enabled [ 8.052114] JBD: no valid journal superblock found [ 8.056962] EXT3-fs (mmcblk0p2): error loading journal [ 8.066333] EXT3-fs (mmcblk0p2): recovery required on readonly filesystem [ 8.073146] EXT3-fs (mmcblk0p2): write access will be enabled during recovery [ 8.080931] EXT3-fs: barriers not enabled [ 8.085389] JBD: no valid journal superblock found [ 8.090203] EXT3-fs (mmcblk0p2): error loading journal [ 8.096185] EXT2-fs (mmcblk0p2): error: couldn't mount because of unsupported optional features (4) kinit: Unable to mount root fs on device dev(179,2) kinit: init not found! 3. sudo ./fastboot setvar bootmode diags_kernel or diags, halts at same place as above bootmode kernel gives: Spoiler*: CHS=4/16/104512 size=3424649216 bytes flag type first last lba first lba size Partition p1: 0x00 0x0b 16 <large> 16 6688752 CHS: 0/1/1 - <large> Partition p2: Partition p3: Partition p4: BOOTING DEFAULT. IP-Config: no devices to configure [ 6.317409] EXT3-fs (mmcblk0p1): error loading journal [ 6.340489] EXT3-fs (mmcblk0p1): error loading journal kinit: Mounted root (ext2 filesystem) readonly. [ 6.379594] EXT2-fs (mmcblk0p1): error: ext2_lookup: deleted inode referenced: 9634 [ 6.387275] EXT2-fs (mmcblk0p1): error: remounting filesystem read-only [ 6.395128] EXT2-fs (mmcblk0p1): error: ext2_lookup: deleted inode referenced: 9634 [ 6.402850] EXT2-fs (mmcblk0p1): error: remounting filesystem read-only kinit: init not found! 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
Mini9 almost here... Posts: 5 Karma: 10 Join Date: May 2020 Device: kindle pw2 PaperWhite 2 , KT2 - BASIC, Kindle 3 WiFi and a K3W	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 and then place the .bin on in the documents folder to repair the system, or is that too easy ? anyone any ideas?

05-10-2020, 01:56 PM	#3
Mini9 almost here... Posts: 5 Karma: 10 Join Date: May 2020 Device: kindle pw2 PaperWhite 2 , KT2 - BASIC, Kindle 3 WiFi and a K3W	Or use the menu "*Update using update.bin file on FAT partition" ? Spoiler*: Menu ==== 3. Load MMC0 over USB storage 4. Erase MMC0 I. Initialize Partition Table (fdisk) and format FAT O. Format and overwrite FAT partition E. Export FAT partition U. Update using update.bin file on FAT partition M. Update using update*.bin file on FAT partition of second MMC port D. dmesg / kernel printk ring buffer. Q. quit

05-10-2020, 11:12 PM	#6
hius07 Wizard Posts: 1,179 Karma: 3592925 Join Date: Sep 2014 Location: Ukraine Device: Kindle	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
Mini9 almost here... Posts: 5 Karma: 10 Join Date: May 2020 Device: kindle pw2 PaperWhite 2 , KT2 - BASIC, Kindle 3 WiFi and a K3W	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: # Just in case anyone else wants to. gunzip -dv rootfs.img.gz sudo mount -o loop rootfs.img [/mnt/somedir] # then I copied the fonts file and decompressed it unsquashfs fonts.sqsh Fonts in fonts.sqsh Spoiler: total 130M 14M STSongBold.ttf 13M STSongMedium.ttf 12M STSongTCBold.ttf 11M STHeitiBold.ttf 11M STHeitiMedium.ttf 11M STSongTC.ttf 9.5M STHeitiTC.ttf 6.8M STHeitiTCBold.ttf 5.6M TBMinchoBold_213.ttf 5.5M TBMinchoMedium_213.ttf 3.9M NotoSerifKR-Medium.otf 3.7M TBGothicBold_213.ttf 3.7M TBGothicMed_213.ttf 2.9M NotoSerifKR-Black.otf 2.5M code2000.ttf 2.1M NotoSansKR-Black.otf 1.9M NotoSansKR-Regular.otf 448K Caecilia_LT_65_Medium.ttf 444K Caecilia_LT_67_Cond_Medium.ttf 412K Caecilia_LT_77_Cond_Bold.ttf 412K Caecilia_LT_75_Bold.ttf 408K Caecilia_LT_66_Medium_Italic.ttf 404K Caecilia_LT_78_Cond_Bold_Italic.ttf 404K Caecilia_LT_76_Bold_Italic.ttf 404K Caecilia_LT_68_Cond_Medium_Italic.ttf 400K Bookerly-Italic.ttf 396K Bookerly-BoldItalic.ttf 396K Bookerly-Regular.ttf 392K Bookerly-Bold.ttf 356K Futura-Bold.ttf 344K Helvetica_LT_75_Bold.ttf 328K Futura-Medium.ttf 324K Futura-BoldOblique.ttf 308K Futura-MediumOblique.ttf 300K Helvetica_LT_65_Medium.ttf 300K Helvetica_LT_66_Medium_Italic.ttf 292K Helvetica_LT_76_Bold_Italic.ttf 208K NotoSansDevanagari-Regular.ttf 200K Baskerville-Italic.ttf 192K SakkalKitab-Bold.ttf 188K SakkalKitab-Regular.ttf 188K NotoSansGujarati-Regular.ttf 184K Palatino-Regular.ttf 176K NotoSansBengali-Regular.ttf 168K NotoSansTelugu-Regular.ttf 164K Palatino-Bold.ttf 164K DiwanMuna-Regular.ttf 156K DiwanMuna-Bold.ttf 156K Baskerville-Regular.ttf 156K Palatino-Italic.ttf 148K Palatino-BoldItalic.ttf 140K NotoNaskhArabicUI-Regular.ttf 136K NotoNaskhArabicUI-Bold.ttf 136K NotoSansKannada-Regular.ttf 136K Baskerville-Bold.ttf 132K Baskerville-BoldItalic.ttf 124K Amazon-Ember-Medium.ttf 124K Amazon-Ember-MediumItalic.ttf 116K NotoNaskh-Regular.ttf 116K NotoNaskh-Bold.ttf 108K KindleBlackboxItalic.ttf 108K KindleBlackboxBoldItalic.ttf 104K Amazon-Ember-Regular.ttf 104K KindleBlackboxRegular.ttf 104K AmazonEmberBold-Regular.ttf 104K Amazon-Ember-Bold.ttf 104K Amazon-Ember-RegularItalic.ttf 104K KindleBlackboxBold.ttf 100K Amazon-Ember-BoldItalic.ttf 100K AmazonEmberBold-Italic.ttf 100K AmazonEmberBold-Bold.ttf 100K Amazon-Ember-Heavy.ttf 100K AmazonEmberBold-BoldItalic.ttf 100K MTChineseSurrogates.ttf 100K Amazon-Ember-HeavyItalic.ttf 92K NotoSansMalayalam-Regular.ttf 80K OpenDyslexic-BoldItalic.otf 72K OpenDyslexic-Italic.otf 68K Kindle_Symbol.ttf 60K NotoSansTamil-Regular.ttf 44K OpenDyslexic-Bold.otf 44K OpenDyslexic-Regular.otf 28K fonts.dir 24K Kindle_MonospacedSymbol.ttf 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

05-10-2020, 02:17 PM	#4
hius07 Wizard Posts: 1,179 Karma: 3592925 Join Date: Sep 2014 Location: Ukraine Device: Kindle	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
Mini9 almost here... Posts: 5 Karma: 10 Join Date: May 2020 Device: kindle pw2 PaperWhite 2 , KT2 - BASIC, Kindle 3 WiFi and a K3W	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 ....

05-11-2020, 01:48 PM	#8
NiLuJe BLAM! Posts: 13,506 Karma: 26047202 Join Date: Jun 2010 Location: Paris, France Device: Kindle 2i, 3g, 4, 5w, PW, PW2, PW5; Kobo H2O, Forma, Elipsa, Sage, C2E	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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