I have a Lenovo laptop with Intel Graphics 520 and docking station.
The docking station features a DisplayPort.
I am using an LG 32UD59-B 4K monitor which has 3 inputs : 1x DisplayPort, 2x HDMI 2.0 .
If I connect the DisplayPort from the docking station directly to the LG monitor DisplayPort input, I get 4K60 (3820×2160 at 60 Hz).
However, I want to use the HDMI 2.0 input on the LG monitor, because the other inputs are already in use (other devices connected).
I bought the CAC-1080 adapter for this reason.
Unfortunately, I get “no signal” when I use the docking station DisplayPort out, plus CAC-1080 and use an HDMI cable to the monitor’s HDMI in. This is true both in Windows and during BIOS screens on the laptop.
The CAC-1080 adapter works fine at 4K 60 with the DisplayPort output from a GTX 960 on a desktop computer, and also works fine with the DisplayPort output from another desktop with Intel 530 graphics (built-in to motherboard). This is when using the same HDMI cable, same monitor and same HDMI input on the monitor.
The signal failure only occurs with the Intel 520 on the laptop. Because the adapter works with two GPUs and not a 3rd, I think a defective CAC-1080 unit can be ruled out. This is likely some compatibility issue. Hopefully, it can be fixed in firmware in the adapter.
Please help. I tried looking for a support link but did not find one, so I am posting this to the forum.