3 ms·

I don't see how lag could be caused by a cable or hub. It's not like a remote desktop or VNC connection, where what flows over the cable is commands to change

I don't see how lag could be caused by a cable or hub. It's not like a remote desktop or VNC connection, where what flows over the cable is commands to change a stored image; there is no stored image -- every pixel is re-sent for every frame. Any lag must therefore be internal to the laptop. If you have an image on the monitor, and it isn't scrambled and the colors are right, the cable and hub are working.

ricardobeat 9y ago
You’d be surprised. I was just last week forced to use a USB-C-to-DisplayPort cable, instead of a straightforward DP to DP cable to get a 4K monitor to work. Using the latter, the computer thought everything was fine but the screen flickered like a CRT, horizontal splits and all, and went black every 3s. There are so many layers involved I don’t even want to think about it, and am just happy it worked...
dom0 9y ago
On a marginal connection source/sink of a DP link will re-train which interrupts main link operation, causing brief lags in display. If the connection is even worse you'll get the usual black-picture-for-a-few-seconds dance.