Self built drv_dsl_cpe_api is non functional

Hi,
I built the package kmod-ltq-vdsl-vr9 using current master and tried to install it on a FB 7430. Package from snapshots works but my version doesn't (module loads though). vdsl_cpe_control prints:
IFXOS ERROR - User Thread Shutdown <ubus> - no responce

My kernel module only differs in two bytes:

 radiff2  -x drv_dsl_cpe_api.ko drv_dsl_cpe_api.ko2
  offset     0 1 2 3 4 5 6 7 8 9 A B C D E F 0123456789ABCDEF    0 1 2 3 4 5 6 7 8 9 A B C D E F 0123456789ABCDEF
0x00000000  7f454c46010201000000000000000000 .ELF............   7f454c46010201000000000000000000 .ELF............
0x00000010  00010008000000010000000000000000 ................   00010008000000010000000000000000 ................
...
0x00005ca0! 27bdffe8afbf0014afb000108c90002c '..............,   27bdffe8afbf0014afb000108c900024 '..............$
0x00005cb0  7e10980016000008000000000c000000 ~...............   7e10980016000008000000000c000000 ~...............
0x00005cc0  8ca400908fbf0014020010258fb00010 ...........%....   8ca400908fbf0014020010258fb00010 ...........%....
...
0x00005ce0! 27bdffe0afb00018afbf001c8c84002c '..............,   27bdffe0afb00018afbf001c8c840024 '..............$
0x00005cf0  00a080257c8498000c00000027a50014 ...%|.......'...   00a080257c8498000c00000027a50014 ...%|.......'...
0x00005d00  144000068fa30014ae0300908fbf001c .@..............   144000068fa30014ae0300908fbf001c .@..............
...

I think that is inside some part of the autoboot code.

Does anybody have some immediate idea what might have gone wrong? Already ran make clean but output was the same

Ok, I built my own sysupgrade which runs the module.
I'm still confused, the flashed snapshot image was as old as my git, the module should have worked Imho.