Hello,

I tried to flash a current Ubiquiti Bullet M2 (AirOS XM.v5.3.5) with OpenWRT 
r29592 from 
http://downloads.openwrt.org/backfire/10.03.1/ar71xx/openwrt-ar71xx-ubnt-bullet-m-squashfs-factory.bin
 but only got "Bad firmware update image." 

I found a thread at the DDWRT forum [1], discussion a simular issue and tried 
their 
ftp://www.dd-wrt.com/others/eko/BrainSlayer-V24-preSP2/2012/06-08-12-r19342/ubnt_bullet_m2_hp/BS2M-DD-WRT.bin
 which worked.

The commit used to fix this bug seems to be the following:

http://svn.dd-wrt.com:8000/changeset/17592
>        cat $(ARCH)-uclibc/root.fs  >> $(ARCH)-uclibc/aligned.uimage 
> 651   651             ./tools/trx_n  -m 30000000 -o 
> $(ARCH)-uclibc/ar7420-firmware.bin $(ARCH)-uclibc/aligned.uimage 
> 652                   tools/ubnt/src/mkfwimage -v XM.ar7240.DD-WRT -o 
> $(ARCH)-uclibc/ubntm-dd-wrt.bin -i tools/ubnt/m-dd-wrt.txt 
> 653                   tools/ubnt/src/mkfwimage -v BZ.ar7240.DD-WRT -o 
> $(ARCH)-uclibc/ubntbz-dd-wrt.bin -i tools/ubnt/m-dd-wrt.txt 
>       652             tools/ubnt/src/mkfwimage -v 
> XM.ar7240.v6.0.0.60000.110900.1000 -o $(ARCH)-uclibc/ubntm-dd-wrt.bin -i 
> tools/ubnt/m-dd-wrt.txt 
>       653             tools/ubnt/src/mkfwimage -v 
> BZ.ar7240.v6.0.0.60000.110900.1000 -o $(ARCH)-uclibc/ubntbz-dd-wrt.bin -i 
> tools/ubnt/m-dd-wrt.txt 

Might you integrate this patch also in the openwrt building workflow, so that 
the images at http://downloads.openwrt.org/ also work?

Thanks in advance,
Andi

[1] 
http://www.dd-wrt.com/phpBB2/viewtopic.php?t=155295&postdays=0&postorder=asc&start=30

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