@SeattleNina Mini-DisplayPort to HDMI should have worked. Are you just using a basic MiniDP to HDMI adapter with an HDMI cable, or an actual MiniDP to HDMI cable? Either way, did you set the display to its HDMI input when you did that?
What cable/device did you use for USB to HDMI? That is not a valid setup unless you're using an actual USB video dongle, but those are more expensive than typical cables and the technology they use for sending video over USB comes with some drawbacks.
The simplest setup would be a Mini-DisplayPort to DisplayPort cable.
In terms of a daisy chain, the P2219H doesn't have a DisplayPort output that you would need in order to set up a daisy chain. The DisplayPort connector is an input, and it cannot be used as an output. So a daisy chain isn't an option with your displays. But if you DID have at least one display that had a DisplayPort output in order to set up a daisy chain, then that might actually be EASIER to live with, especially if you want to use both of your external displays with both systems. One option would be to move the cable on the first display between your dock and Surface as needed, in which case moving that single cable would switch BOTH displays over. The other option would be to have two cables going to the first display, one for each system, and then just switch the INPUT on the first display back and forth as needed. That would also switch both displays over between your two systems, although in that case you'd need your first display to have two DisplayPort-based inputs, i.e. DisplayPort, Mini-DisplayPort, or USB-C. You would not be able to use an HDMI connection to the first display in a daisy chain scenario.
jphughan
9 Legend
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14K Posts
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October 10th, 2021 16:00
@SeattleNina Mini-DisplayPort to HDMI should have worked. Are you just using a basic MiniDP to HDMI adapter with an HDMI cable, or an actual MiniDP to HDMI cable? Either way, did you set the display to its HDMI input when you did that?
What cable/device did you use for USB to HDMI? That is not a valid setup unless you're using an actual USB video dongle, but those are more expensive than typical cables and the technology they use for sending video over USB comes with some drawbacks.
The simplest setup would be a Mini-DisplayPort to DisplayPort cable.
In terms of a daisy chain, the P2219H doesn't have a DisplayPort output that you would need in order to set up a daisy chain. The DisplayPort connector is an input, and it cannot be used as an output. So a daisy chain isn't an option with your displays. But if you DID have at least one display that had a DisplayPort output in order to set up a daisy chain, then that might actually be EASIER to live with, especially if you want to use both of your external displays with both systems. One option would be to move the cable on the first display between your dock and Surface as needed, in which case moving that single cable would switch BOTH displays over. The other option would be to have two cables going to the first display, one for each system, and then just switch the INPUT on the first display back and forth as needed. That would also switch both displays over between your two systems, although in that case you'd need your first display to have two DisplayPort-based inputs, i.e. DisplayPort, Mini-DisplayPort, or USB-C. You would not be able to use an HDMI connection to the first display in a daisy chain scenario.