Your past post only mention the U3223QZ. What is the second Dell monitor model?

Did you test both DDM 2.0.0.134 and DDM 2.0.0.135?

I'm seeing the same behavior with DDM version 2.0.0.135 and two U2720Q monitors. Setting a hotkey for one monitor changes the value for both. (Or appears to, based on what's visible in the UI). Pressing the hotkey sequence only changes the input source on one monitor.

This is exactly the same behaviour here.

I think either let DDM to support dedicate hotkey for multiple monitors, or a universal hotkey to switch both monitors to a pre-defined secondary sources.

Pressing the hotkey only change the input source on the primary monitor, It is very annoying at the moment.

Uninstall 2.0.0.135, install 2.0.0.134 and retest. If the same behavior in both versions, it has to be working as they designed it.

134 and 135 have the same behavior but I can't believe it's "working as they designed it." It must be a bug in version 2.x.

1. It's a regression in functionality from DDM 1.x. Users don't expect to lose functionality when moving to a newer version.
2. While it might make sense to be able to switch both (or all) monitors using a single hotkey, the current behavior only switches the primary monitor. The secondary monitor source can't be set via DDM.
3. The UI still has a combobox for selecting the monitor; that control wouldn't be necessary  if the intent was to switch all monitors with a single hotkey.
4. Having a single hotkey would only work if all the monitors were the same model (or at least had the same set of inputs). It couldn't work with a mixture of different monitors.

Even for the primary monitor, switching seems slower than it was with version 1.x and more likely to miss the hotkey sequence being pressed.

I can confirm that the hotkeys only work on 1 monitor at a time and the response time is much slower now. However, I am particularly dissapointed to see the dedicated input hotkey replaced with the toggle inputs hotkey, which when paired with the alternating inputs hotkey, is an objective downgrade. I hope these changes are reverted asap. Why not just have a hotkey for each input type for each monitor?

Is there a channel that we can provide this feedback to DDM team?

The current 2.0 version is really impacting our productivity and we need to let DDM listen to our feedbacks.

This is the channel and they are aware of this thread.

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@DELL-Chris M wrote:

Are you moving the mouse cursor to the second monitor BEFORE activating DDM commands?

The design of the hotkey follows the mouse cursor. The monitors share the same hotkeys. If you want to activate the hotkey of a monitor, place the mouse on the specific monitor to activate the function.

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No. How was I supposed to know that the workflow design changed between v1 and v2? There was no notification during upgrade. There doesn't appear to be any documentation. There's no indication in the UI, which is similar enough to the old one (monitor selection combobox) that it's entirely reasonable to  assume that hotkeys are per-monitor.