I have a 34GP83A-B LG ultra wide that has DisplayPort and HDMI 2.0 inputs. I’m using the dipslayport for another computer, and am using the TBT3-UDC3 with HDMI 2.0. The monitor supports 3440x1440 with 50hz and 85hz, also optionally HDR, via HDMI 2.0. All of these modes seem to work ia the TBT3-UDC3 hdmi out, BUT, I’m getting random signal drop outs.
I tried buying a high quality HDMI 2.1 cable to see if the cable makes a difference, but oddly even though it’s a better cable than the 2.0 cable I’m using now, it doesn’t seem to work at all with the TBT3-UDC3 and LG monitor. This is surprising, as I thought these 2.1 cables should be backwards compatible with a 2.0 device.
I’ve now dropped the system down to 50hz, and it’s maybe seems like I get fewer dropouts. That said, I’d really like to at least get 85hz. Before I buy anymore cables:
- Is it reasonable to think that the dock will support this resolution and refresh rate via HDMI 2.0?
- The dock definitely supports it via DisplayPort, so if I got a DisplayPort to HDMI cable would that work? The supplied DisplayPort to HDMI adapter doesn’t seem to work well at all, but perhaps a properly rated single adapter cable would?