Hi,

Updated from Windows 7 to Windows 8. Now I have only 2 channels audio out from HDMI.
Before the update 5.1 worked excellent. I have tested with several different drivers from you, such as 12.6 and 12.10. But no difference.

Graphics Card
HD 3470

AMD Catalyst Driver Version, and Driver History
- 12.6  12.10

Operating System
- 32-bit Windows 8

Uppdated from Windows 7

Issue Details
only get 2 Channel audio out from HDMI

Motherboard or System Make & Model
Asus M70SR

Display Device(s) and Connection(s) Used
HDMI to Onkyo tx-nr609

Applications and Games
Different movies files such as mkv mpeg

Same issue was reported below:

Topic Title: HD5450 - Missing 5.1 Sound in Windows 8

Please read the link below and submit a ticket to AMD so that it can be addressed and included in a future version release (assuming that they are still supporting the HD3xxx line-up of ATi cards....no promises though)

**STICKY** | AMD ISSUE REPORTING FORM
Reproducible issues can be reported here.

The opinions expressed above do not represent those of Advanced Micro Devices or any of their affiliates.
Requiescat In Pace AMD Processor Forums | Member since: 1/19/2009 | Post count: 4142
Please don't PM me with questions, instead create a thread so that everyone can assist and benefit from the knowledge provided. Thanks in advance!