2 replies to this topic

[Leon Hong]

I have two desktops (i3-3225 and i5-3570k) using HD4000 as the one and only graphic output source. They are enabled with DSDT/EFI strings each and configured to "AAPL,ig-platform-id" = <00006605> both. They are connected to LCD displays (LG 27" and ASUS 22") with HDMI/DVI cables each. Everything goes fine until I tried to see some movie previews with iTunes. Once I clicked the preview button, the preview window was filled with colorful squares and mosaic sprites, just like undecoded HDMI outputs on older LCD displays without HDCP supports. With the same LCD displays connected, my notebook using NV9600GT had quite normal movie preview windows without a glitch.

Because the desktop HD4000 worked greatly if not using iTunes, I had no idea what happened eventually. Other players such as QTW, Flip4Mac, Flash, MplayerX, or even PPS had normal decoding behaviors and excellent video outputs, only iTunes screwed me up. Is there anbody having the same problems just like me? Can something be done to fix it? Many, many thanks if any one can help!!  

PS: I am pretty sure that I had double-checked the DSDT/EFI strings configurations to be correctly settled...

[Leon Hong]

Solved. Just changed the IOGVACodec settings from Gen7 to Gen6 in /System/Library/Extensions/AppleIntelHD4000Graphics.kext/Contents/Info.plist.

[Mieze]

Leon Hong, on 07 November 2012 - 04:35 AM, said:

I have two desktops (i3-3225 and i5-3570k) using HD4000 as the one and only graphic output source. They are enabled with DSDT/EFI strings each and configured to "AAPL,ig-platform-id" = <00006605> both. They are connected to LCD displays (LG 27" and ASUS 22") with HDMI/DVI cables each. Everything goes fine until I tried to see some movie previews with iTunes. Once I clicked the preview button, the preview window was filled with colorful squares and mosaic sprites, just like undecoded HDMI outputs on older LCD displays without HDCP supports. With the same LCD displays connected, my notebook using NV9600GT had quite normal movie preview windows without a glitch.

Because the desktop HD4000 worked greatly if not using iTunes, I had no idea what happened eventually. Other players such as QTW, Flip4Mac, Flash, MplayerX, or even PPS had normal decoding behaviors and excellent video outputs, only iTunes screwed me up. Is there anbody having the same problems just like me? Can something be done to fix it? Many, many thanks if any one can help!!  

PS: I am pretty sure that I had double-checked the DSDT/EFI strings configurations to be correctly settled...

Hello,

can you please tell me which mainboard you are using? I have the same issue and can resolve it with your solution, but I want to find out what's the cause of the problem.

Mausi