Sign in with
Sign up | Sign in
Your question
Solved

GA-78LMT-USB3 Onboard HDMI audio not working on Windows 7

Last response: in Motherboards
Share
December 19, 2013 10:56:07 PM

Hi all,

I've been banging my head against the wall on this. I have the aforementioned motherboard, and the manual says it supports 5.1 (actually 7.1) surround via the onboard HDMI. However, while the video works, I cannot get the sound to go correctly from my PC to my receiver via HDMI.

The problem seems to be that the VIA HDMI audio driver is either not installed, or overwritten by the generic Microsoft one, which is only 2-channel instead of 5.1

I've tried updating the driver (which is a VIA chipset, *not* realtek), both from GIGABYTE and directly from VIA. I've tried uninstalling the Microsoft HDMI audio driver, but it's immediately reinstalled when I reboot or reinstall the VIA drivers. I've tried using the SPDIF device for playback. Note that I am NOT using SPDIF, I don't even have the SPDIF jumpers hooked in, but the VDeck Audio Driver program lists it as "SPDIF HDMI" so I thought it was worth a go.

Does *anyone* have any experience with this problem? Googling it just brings up obvious solutions (yes, I'm sure I've selected HDMI as my default) or irrelevant ones (my board does not use a Realtek driver/chipset). It's really driving me crazy, and I'm about to the point of just returning all the parts and never buying GIGABYTE hardware again.
a b V Motherboard
December 19, 2013 11:39:39 PM

motherboard model?

u have installed win 7 "genuine" os?
m
0
l
December 20, 2013 8:11:24 AM

gokul36 said:
motherboard model?

u have installed win 7 "genuine" os?


Model GA-78LMT-USB3, Rev 5. And yes, it's a genuine registered copy of Windows 7 Pro.
m
0
l
Related resources
a b V Motherboard
December 20, 2013 8:32:25 AM

try to change the HDMI cable
m
0
l
December 20, 2013 11:45:35 AM

gokul36 said:
try to change the HDMI cable


No luck. The HDMI cable, speaker and receiver work perfectly fine with my PS3, which makes me 99% sure it's a problem with the driver/motherboard.
m
0
l
a b V Motherboard
December 20, 2013 11:58:23 AM

try to reset ur BIOS
m
0
l
December 20, 2013 1:02:11 PM

gokul36 said:
try to reset ur BIOS


Reset my BIOS, no change (not that I had really changed anything anyway). An interesting tidbit is that when I choose "Connect to a Projector" from Windows settings, I'm at least able to get sound from the L and R speakers via HDMI (though it's still not 5.1, and also my resolution drops to 1440x900). I'm not exactly sure why, but it probably doesn't matter as there's still a fundamental problem with the 5.1 HDMI driver.
m
0
l
December 20, 2013 1:59:16 PM

gokul36 said:
try to reset ur BIOS


So it turns out HDMI audio is controlled by the *graphics* driver. I wish I'd known that. I installed the latest AMD driver for my chipset, and I can now get audio via HDMI! It still doesn't work correctly, though, as I'm only able to choose Stereo sound for my HDMI device. So now the question is, how do I get 5.1 working?
m
0
l

Best solution

a b V Motherboard
December 20, 2013 7:32:01 PM

try to change the Audio settings in ur HDMI monitor
Share
February 26, 2014 7:17:30 PM

zegota said:
gokul36 said:
try to reset ur BIOS


So it turns out HDMI audio is controlled by the *graphics* driver. I wish I'd known that. I installed the latest AMD driver for my chipset, and I can now get audio via HDMI! It still doesn't work correctly, though, as I'm only able to choose Stereo sound for my HDMI device. So now the question is, how do I get 5.1 working?


which driver did you end up downloading, as I too am currently having the same problem with not getting sound from the hdmi, but i do get sound when i have a 3.5mm to rca connected to a set of desktop speakers
m
0
l
!