BigSur 11.5.1 just 640x480 resolution

ndanner23 · 10-20-2021, 07:20 PM

I am having trouble using the Diamond Multimedia BVU5500H USB to HDMI adapter (using DisplayLink) with the NewerTech HDMI Headless 4k Display adapter (NWTADP4KHEAD) aka an "hdmi dummy plug". With the NWTADP4KHEAD in the HDMI port of the BVU5500H it only has one resolution 640x480. The BVU5500H works as expected with an actual HDMI display (resolutions up to 4k) and the NWTADP4KHEAD works with other HDMI outputs/adapters (also resolutions up to 4k). Does someone recommend a brand of headless hdmi dummy you recommend or is it possible to put the adapter in a mode where it emulates a display without one? I am using a Mac running macOS 11 with current updates i7 4-core 4.0ghz with 32gb RAM and over 2.5 Tb of storage.

10-20-2021, 07:20 PM	#7
ndanner23 Junior Member Join Date: Oct 2021 Posts: 1	Same issue with different equipment I am having trouble using the Diamond Multimedia BVU5500H USB to HDMI adapter (using DisplayLink) with the NewerTech HDMI Headless 4k Display adapter (NWTADP4KHEAD) aka an "hdmi dummy plug". With the NWTADP4KHEAD in the HDMI port of the BVU5500H it only has one resolution 640x480. The BVU5500H works as expected with an actual HDMI display (resolutions up to 4k) and the NWTADP4KHEAD works with other HDMI outputs/adapters (also resolutions up to 4k). Does someone recommend a brand of headless hdmi dummy you recommend or is it possible to put the adapter in a mode where it emulates a display without one? I am using a Mac running macOS 11 with current updates i7 4-core 4.0ghz with 32gb RAM and over 2.5 Tb of storage.