HD2500 - no audio detected through AVR in Win7 - help!

[EVign1]

Issue:

The HD2500 in Windows 7 does not recognize the AVR as an audio device; no sound at all comes through DisplayPort/HDMI.

Connection layout:

PC Displayport to HDMI cable -> AVR HDMI output-> TV HDMI input

Key Notes:

- Connecting the PC directly to the TV allows for an audio device to be detected by Intel Display Audio; everything works

- Connecting the PC through the AVR has video working perfectly, but no audio device is identified

- Booting the PC in XBMC Ubuntu has the audio working perfectly across all formats supported by the AVR (DD/DTS, LPCM, True-HD)

Resolution notes:

- EDID override does not work (extension block does not load); apparently this is a known issue with Intel drivers

- Disabling the analog audio (in BIOS or drivers) does not resolve the problem

- Every single Intel driver version released did not solve the problem

- Changing TVs did not solve the problem

- Changing AVR may solve the problem, but I only have the one.

- Changing cables has not been tested yet; though the current cable works perfectly well in XBMC Ubuntu, a different one will be tested shortly.

Conclusion:

- This is a Windows Driver issue with Intel Display Audio.! The hardware and connections works perfectly, as tested through XBMC Ubuntu.

Request:

- Can this issue be prioritized, given all the people having significant similar issues? My setup is as vanilla as it goes; should not be this complex to get audio working.

Equipment:

- Lenovo M92p Tiny PC with DisplayPort (DP++), HD2500

- Pioneer VSX-1120 A/V Receiver

- Samsung LN-B750 LCD TV

[DArce]

If the sound works properly when not using the AV receiver, there might be a compatibility issue going on. You may need to test updating the firmware of the receiver

Also you may update the BIOS of the system you have. For BIOS updates you can refer to:

http://support.lenovo.com/en_US/downloads/detail.page?&DocID=HT073728 http://support.lenovo.com/en_US/downloads/detail.page?&DocID=HT073728

In addition, please confirm what is the default audio playback device when using the AVR in the system, and check that there are no conflicts in the Device Manager while doing that.