Karaoke Joysound Wii Super DX not working and crashing

[yumeyao]

Hello everyone. I've tried DX/Opengl/Software rendering with Dolphin 4.0.2/3.5/4.0-553 x64.

With software rendering, the game is simulated(and that helps me identified it's likely to a graphic issue), but of course the fps is extremely poor.
With all other types, the game can't run into title and crash/hang(with a fps of 0) at loading screens (note screen/copyright warning/etc.)
Particularly, there is a message box "EFB: Poke Z not implemented" if DX is used at the very start. And no matter whether DX is used or opengl is used, the loading screens flash intensively.
I've also tried adjusting graphic options(especially for EFB & XFB), still no luck.

If any log/dump is needed, please let me know.

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PC Spec:
i7 3770 + 2x8G RAM + Intel HD4000
Windows 7 x64

[yumeyao]

update:
by disabling dual core, and enabling XFB, the loading screens are now displayed correctly. But it still crashes, and the crashes occurs at the point it is loading save data.
Also it seems the situation descripted in op thread is just that loading screens are not displayed correctly (flashing between black and loading screens), and the crash also occurs at the loading save data stage... However, since software rendering can go through it, so I still think it's something related with graphics.

BTW, after disabling dual core and enabling XFB the dolphin simulator runs very slowly, even slower than software rendering... The only difference is that software rendering maxs 2 cores of my cpu, but disabling dual core and enabling XFB and using a hw rendering costs almost no cpu.....

Really weird..