https://community.intel.com/t5/Graphics/Audio-over-HDMI-problem/m-p/362478#M25121 <P>OK.</P><P>I found a solution. Disable VT-d in UEFI!!!</P><P>Bitstreaming AC3 with Hyper-V works well.</P> Wed, 30 Dec 2015 22:14:53 GMT MMars4 2015-12-30T22:14:53Z https://community.intel.com/t5/Graphics/Audio-over-HDMI-problem/m-p/362477#M25120 <P>Welcome</P><P></P><P></P><P>I would like to report the followin issue with some drivers/funcions under Windows 10. After turning Hyper-V on the AC3 bitstreaming over HDMI (Dolby Digital) stops working. The PCM sound/audio and DTS bitstreaming are working fine/correctly in both cases - when Hyper-V is turned on and off, while AC3 bitstreaming works only with Hyper-V turned off.</P><P></P><P></P><P>The problem occured already under the first release of Windows 10 and I think it applies to all drivers which appeared so far.</P><P>Additionally, when you start playing a movie some parts of the screen are rendered as a kind of white semi transparent pixelated areas.</P><P></P><P></P><P>My hardware and software configuration:</P><P></P><P></P><P>- Intel Core i5-4460 Processor</P><P>- Intel Haswell-DT GT2 Integrated Graphics Controller [Micro-Star International]</P><P>- MSI Z97 PC Mate(MS-7850) Motherboard</P><P>- Intel Z97 Chipset</P><P>- Intel Haswell Mini HD Audio Controller PCI\VEN_8086&amp;DEV_0C0C&amp;SUBSYS_78501462&amp;REV_06</P><P>- YAMACHA RX-V475 amplifier connected over/via HDMI</P><P>- Microsoft Windows 10 Professional Build 10586 x64</P><P>- Video driver 20.19.15.4352</P><P>- Audio driver 6.16.0.3190</P> Wed, 30 Dec 2015 19:20:19 GMT https://community.intel.com/t5/Graphics/Audio-over-HDMI-problem/m-p/362477#M25120 MMars4 2015-12-30T19:20:19Z https://community.intel.com/t5/Graphics/Audio-over-HDMI-problem/m-p/362478#M25121 <P>OK.</P><P>I found a solution. Disable VT-d in UEFI!!!</P><P>Bitstreaming AC3 with Hyper-V works well.</P> Wed, 30 Dec 2015 22:14:53 GMT https://community.intel.com/t5/Graphics/Audio-over-HDMI-problem/m-p/362478#M25121 MMars4 2015-12-30T22:14:53Z