Comment # 24 on bug 947816 from Takashi Iwai

OK, after checking the comment 16, I see the point.  Your TW version does work
while Leap version doesn't?  I was confused by mixed comments, sorry ;)

Basically the situation of kdump itself is same as of the original bug report. 
We "fixed" it by disabling CONFIG_KEXEC_VERIFY_SIG for openSUSE kernels.

So the question is whether you still get this particular error even with the
local kernels without CONFIG_KEXEC_VERIFY_SIG.  Please clarify it: whether the
same error "kexec_file_load failed: Key was rejected by service" appears even
for kernels without that kconfig.