(In reply to comment #21)
> (In reply to comment #19)
> > I wasn't very clear in my #12 comment, but what I was trying to say it is
> > something fishy about "reg_block->asRegIndexBuf". It is defined in
> > atombios.h as:
> > ATOM_MEMORY_SETTING_DATA_BLOCK  asRegDataBuf[1];
> >
> 
> It's a variably sized array and the size varies depending on the system. 
> The size of that array is defined by usRegIndexTblSize.  Hence the
> calculation to determine the number of elements:
> 
> num_entries = (u8)((le16_to_cpu(reg_block->usRegIndexTblSize)) /
> sizeof(ATOM_INIT_REG_INDEX_FORMAT)) - 1;

ok, wasn't aware of that. My compiler is:
gcc (GCC) 4.8.1