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NanoPi 2 Fire doesn't boot OS build with buildroot

Moderators: chensy, FATechsupport

After building output by buildroot , I found 4 files in image dir :
u-boot.bin
uImage
rootfs.tar.gz and rootfs.tar.
I extracted it with sdfuse nanopi2 and master , of course i delete zImage from prebuilt dir and power on board with HDMI connect but screen show only color horizontal bars and blue LED on board is light continuously.
When i use win32diskimager to extract NanoPi2 Debian image , it works and boots Debian OS.
I use UART and following messages show:
BOARD= [NanoPi 2 Fire]
LCD = N/A (-1)
MMC: NXP DWMMC: 0, NXP DWMMC: 1, NXP DWMMC: 2
In: serial
Out: serial
Err: serial
switch to partitions #0, OK
mmc0 is current device
HDMI: display.0, preset 0 (1280 * 720)
HDMI: PHY Ready!!!
Failed to mount ext2 filesystem...
** Unrecognized filesystem type **
can't find bmp at 0x47000000 (type:0xffff), fb:0x46000000...
LOGO: DRAW FB=0x46000000, X=1280, Y= 720, Bpp=32
Hit any key to stop autoboot: 0
Failed to mount ext2 filesystem...
** Unrecognized filesystem type **
Failed to mount ext2 filesystem...
** Unrecognized filesystem type **
Wrong Image Format for bootm command
ERROR: can't get kernel image!
nobody !! :roll:

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