Did you make sure the update.img is latest?
Please provider some information about packing image for me
Like this:
Installed file list: out/target/product/kvim/installed-files.txt
Target system fs image: out/target/product/kvim/obj/PACKAGING/systemimage_intermediates/system.img
Running: mkuserimg.sh -s out/target/product/kvim/system out/target/product/kvim/obj/PACKAGING/systemimage_intermediates/system.img ext4 system 1073741824 -D out/target/product/kvim/system -L system out/target/product/kvim/root/file_contexts
make_ext4fs -s -T -1 -S out/target/product/kvim/root/file_contexts -L system -l 1073741824 -a system out/target/product/kvim/obj/PACKAGING/systemimage_intermediates/system.img out/target/product/kvim/system out/target/product/kvim/system
Creating filesystem with parameters:
Size: 1073741824
Block size: 4096
Blocks per group: 32768
Inodes per group: 8192
Inode size: 256
Journal blocks: 4096
Label: system
Blocks: 262144
Block groups: 8
Reserved block group size: 63
Created filesystem with 1944/65536 inodes and 119771/262144 blocks
Install system fs image: out/target/product/kvim/system.img
out/target/product/kvim/system.img+ maxsize=1096220928 blocksize=4224 total=474888664 reserve=11075328
mkdir -p out/target/product/kvim/upgrade
Package target files: out/target/product/kvim/obj/PACKAGING/target_files_intermediates/kvim-target_files-20170406.zip
cp device/khadas/kvim/upgrade/aml_sdc_burn.ini out/target/product/kvim/upgrade/aml_sdc_burn.ini
cp device/khadas/kvim/upgrade/u-boot.bin.sd.bin out/target/product/kvim/upgrade/u-boot.bin.sd.bin
cp device/khadas/kvim/upgrade/u-boot.bin.usb.bl2 out/target/product/kvim/upgrade/u-boot.bin.usb.bl2
cp device/khadas/kvim/upgrade/u-boot.bin.usb.tpl out/target/product/kvim/upgrade/u-boot.bin.usb.tpl
cp device/khadas/kvim/upgrade/platform.conf out/target/product/kvim/upgrade/platform.conf
cp device/khadas/kvim/upgrade/aml_upgrade_package.conf out/target/product/kvim/upgrade/aml_upgrade_package.conf
ln -s out/target/product/kvim/system.img out/target/product/kvim/upgrade/system.img
ln -s out/target/product/kvim/userdata.img out/target/product/kvim/upgrade/userdata.img
ln -s out/target/product/kvim/cache.img out/target/product/kvim/upgrade/cache.img
ln -s out/target/product/kvim/boot.img out/target/product/kvim/upgrade/boot.img
ln -s out/target/product/kvim/recovery.img out/target/product/kvim/upgrade/recovery.img
ln -s out/target/product/kvim/u-boot.bin out/target/product/kvim/upgrade/u-boot.bin
ln -sf /home/terry/project/vim/mmallow/out/target/product/kvim/dtb.img out/target/product/kvim/upgrade/meson.dtb
Package: out/target/product/kvim/update.img
./vendor/amlogic/tools/aml_upgrade/aml_image_v2_packer -r out/target/product/kvim/upgrade/aml_upgrade_package.conf out/target/product/kvim/upgrade/ out/target/product/kvim/update.img
[Msg]Pack Item[USB , DDR] from (out/target/product/kvim/upgrade/u-boot.bin.usb.bl2),sz[0xc000]B,
[Msg]Pack Item[USB , UBOOT] from (out/target/product/kvim/upgrade/u-boot.bin.usb.tpl),sz[0xd4000]B,ft[normal]
[Msg]Pack Item[UBOOT , aml_sdc_burn] from (out/target/product/kvim/upgrade/u-boot.bin.sd.bin),sz[0xe0200]B,ft[normal]
[Msg]Pack Item[ini , aml_sdc_burn] from (out/target/product/kvim/upgrade/aml_sdc_burn.ini),sz[0x24d]B,
[Msg]Pack Item[PARTITION , boot] from (out/target/product/kvim/upgrade/boot.img),sz[0x800800]B,ft[normal]
[Msg]Pack Item[VERIFY , boot] from (out/target/product/kvim/upgrade/boot.img),vry[sha1sum 68f873b0efb3f49a6860729e98ddfcbecf30b9ea]
[Msg]Pack Item[PARTITION , bootloader] from (out/target/product/kvim/upgrade/u-boot.bin),sz[0xe0000]B,ft[normal]
[Msg]Pack Item[VERIFY , bootloader] from (out/target/product/kvim/upgrade/u-boot.bin),vry[sha1sum 154fffc47f1d95bfc8631ff2632900f8f85c225f]
[Msg]Pack Item[PARTITION , logo] from (out/target/product/kvim/upgrade/logo.img),sz[0x11b5b0]B,ft[normal]
[Msg]Pack Item[VERIFY , logo] from (out/target/product/kvim/upgrade/logo.img),vry[sha1sum e015d2315620015aab9c91754a65932549f949f7]
[Msg]Pack Item[xml , manifest] from (out/target/product/kvim/upgrade/manifest.xml),sz[0x1056f]B,ft[normal]
[Msg]Pack Item[dtb , meson1] from (out/target/product/kvim/upgrade/meson.dtb),sz[0x94dd]B,
[Msg]Pack Item[conf , platform] from (out/target/product/kvim/upgrade/platform.conf),sz[0xca]B,
[Msg]Pack Item[PARTITION , recovery] from (out/target/product/kvim/upgrade/recovery.img),sz[0xacb000]B,ft[normal]
[Msg]Pack Item[VERIFY , recovery] from (out/target/product/kvim/upgrade/recovery.img),vry[sha1sum f6d6029b7f274907805f96025d22eeb146a5011d]
[Msg]Pack Item[PARTITION , system] from (out/target/product/kvim/upgrade/system.img),sz[0x1c4e39d8]B,ft[sparse]
[Msg]Pack Item[VERIFY , system] from (out/target/product/kvim/upgrade/system.img),vry[sha1sum 271a5249d6f9cf38d30563fcba8f51889fbc195b]
[Msg]version:0x2 crc:0x079fdc19 size:498626148 bytes[475MB]
Pack image[out/target/product/kvim/update.img] OK
out/target/product/kvim/update.img installed