Jumpy menus in EVR mode

[elyl]

Since updating to 6.5, I've tried using EVR mode (Intel G35 chipset) to see if I can cut down on CPU usage a little.

The G35 chipset is supposed to have basic hardware acceleration (ClearVideo) for MPEG 2 and 4 with DirectX10, so I thought I might be able to reduce the CPU usage from about 30% for an MPEG-2 stream.

Bizarrely, CPU usage jumps to 40-60% under EVR (same codecs, Cyberlink PDVD8 - also tried Intervideo with the same sort of results).

What's even stranger, when I'm viewing TV in EVR mode, if I bring up the guide, or any menus, instead of the nice animated scrolling of the menu options, it will intermittently just jump between menu options. So, normally I'd get a nice scrolling effect, but now it will sometimes scroll, or sometimes just jump to the menu option.

I can't work this out, it can't be CPU usage, because even viewing HD (in overlay mode) when the CPUs at 70-80%, I still get smooth scrolling, but at 40-60% in EVR I get the jumpiness.

Any ideas? (and any theories on why CPU usage is higher under EVR?)

[Razillian]

EVR uses DXVA2 hardware acceleration, where as VMR9 uses DXVA. My guess would be that the Intel chipset does not support DXVA2 (actually I would be surprised if it supports the majority of DXVA features).

As for the menu jumpiness see the following post for more info (ie turn off 3d acceleration):

http://forums.sagetv.com/forums/showthread.php?t=36755