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seigeweapon · 10-02-2015, 06:24 AM

hey, guys. I'm trying to flash-write my KPW2 from 5.6.5 to 5.4.x, and being stuck. This is how I tried to do:

1) downloading kernel image and main fs image from http://ixtab.tk/kindle-touch-images/PW2/main/5.4.0/ and put these 2 files on usb root folder
2) soldering the serial wires
3) entering diag mode from Uboot, by "bootm 0xE41000"
4) flashing the two image files to partitions:
dd if=/mnt/us/main_kernel.img of=/dev/mmcblk0 bs=4096 seek=65
zcat /mnt/us/mmcblk0p1.bin.gz | dd of=/dev/mmcblk0p1 bs=4096
5) reboot

after this, my KP2 stops at booting kernel, and crys out this:

[ 2.074566] mmc0: unrecognised EXT_CSD revision 7
[ 2.079296] mmc0: error -22 whilst initialising MMC card

does this mean MMC card on my KP2 is not supported by the downloaded uImage? How can I proceed downgrading my KP2? Thanks!

10-02-2015, 06:24 AM	#9
seigeweapon Junior Member Posts: 4 Karma: 10 Join Date: Oct 2015 Device: kpw2	[help] 5.4.0 doesn't work on my KPW2 hey, guys. I'm trying to flash-write my KPW2 from 5.6.5 to 5.4.x, and being stuck. This is how I tried to do: 1) downloading kernel image and main fs image from http://ixtab.tk/kindle-touch-images/PW2/main/5.4.0/ and put these 2 files on usb root folder 2) soldering the serial wires 3) entering diag mode from Uboot, by "bootm 0xE41000" 4) flashing the two image files to partitions: dd if=/mnt/us/main_kernel.img of=/dev/mmcblk0 bs=4096 seek=65 zcat /mnt/us/mmcblk0p1.bin.gz \| dd of=/dev/mmcblk0p1 bs=4096 5) reboot after this, my KP2 stops at booting kernel, and crys out this: [ 2.074566] mmc0: unrecognised EXT_CSD revision 7 [ 2.079296] mmc0: error -22 whilst initialising MMC card does this mean MMC card on my KP2 is not supported by the downloaded uImage? How can I proceed downgrading my KP2? Thanks!