amd firepro w4100 does not recognize third monitor

I finally had a eureka moment this weekend and started a new install of Windows 8.1 BUT this is what I did:ġ. I had noticed no matter which driver I installed it would always show 'High Definition Audio Bus' with an exclamtion mark and it was driving me crazy as couldn't get HDMI to be recognised for audio - only video (ie extend or mirror displays worked fine). I have now worked out it's def a driver conflict between what appears to be Microsoft's standard driver for audio (that comes with Windows 8 via online driver collection) and realtek or amd drivers (when you try to install either of them). Verify that the configuration is correct as shown above. Uninstall the Realtek hardware anddrivers.Then under Device Driver you will need to select Action, then select Scan for Hardware Changes. If you have downloaded and installed updated Realtek sound drivers they will overwrite your working AMD HDMI drivers and the same problem will occur where the AMD HDMI won’t output sound to your monitor. Make sure that all other conflicting sound devices are disabled under Device Manager – Sound, as shown below: Your Device Manager should look like something like this when you have the AMD HDMI sound working : Verify that the HDMI hardware has been detected and the correct driver has been assigned to it. The system will detect the AMD HDMI Sound Card and install the correct AMD sound drivers. You must also check the box to removethe drivers for the hardware.Īfter the AMD High Definition Audiodevice is uninstalled.Īt the topof the Device Manager screen select “ Scan for Hardware Changes”.If the driver provider is wrong you will need to uninstall the Device and the Driver. Driver Provider should say: Advanced Micro Devices.Right click on the device to display the menu window.Under the heading “Sound, Video and Game Controllers” Right click and select Properties, Driver, should show driver provided by: MicrosoftĢ.AMD HDMI Output (High definition Audio device).

Under the Device Manager sub-heading “ Audio inputs and outputs” The AMD HDMI and Microsoft device drivers must be assigned to the AMD hardware.ġ. You must uninstall the Realtek hardware and drivers so that only the AMD HDMI device is showing.ģ. There are 2 instances of the AMD HDMI card that should be shown under Device Manager.Ģ. There are multiple hardware devices/drivers that are conflicting.ġ. The Realtek HDMI Drivers had been assigned to the AMD HDMI card under Device Manager, Sound, Video and Game Controllers.Ģ. See how the Device Manager sound devices should look when correctly configured below.ġ.AMD Video board installed withHDMI cable to monitor.Realtek Audio onboard (built into motherboard).This FIX worked for this hardware configuration. Testing the AMD HDMI sound output gave the following error message: Problem: AMD HDMI output would not play sound via HDMI cable to monitor speakers.

Amd firepro w4100 does not recognize third monitor