@gishakka Typical passive DP to HDMI cables rely on the source DisplayPort output supporting “Dual Mode DisplayPort”, which allows the DP output to switch to native HDMI signaling. The fact that you’re getting a signal at all means they support that, but they may only support an HDMI revision that only allows up to 1080p, or possibly up to 1440p, even though the DP output supports much higher resolutions when using native DP signaling. Since the display has a DP input, try a regular DP cable and see what happens there. If that works, then since the display only has one DP input available. get an active DP to HDMI adapter/cable that supports HDMI 2.0 for the other one. Active adapters/cables contain a signal converter chip, which allows the DP output to continue using native DP signaling, so as long as your adapter supports HDMI 2.0, you should then be able to run max resolution. To make sure you get the correct type of active adapter/cable, look for one that mentions AMD EyeFinity support. There’s another type of active adapter meant to connect HDMI sources to DP inputs, which is NOT what you want here.
As for DDM, you can configure hotkeys to switch inputs, and even run a command-line command to do so if you just want a batch file you can click or something. Check DDM’s documentation for that. But first make sure to associate each upstream USB interface with the corresponding video interface you end up using, and then when you switch to a different video input, the USB interface will switch over too. Look at the U4919DW manual for that.
Thanks for that, I had just twigged to the problem likely to being with those cables when I read on the box that they only support 1920x1080. Will report back after different cables arrive.
jphughan
9 Legend
•
14K Posts
1
July 4th, 2021 02:00
@gishakka Typical passive DP to HDMI cables rely on the source DisplayPort output supporting “Dual Mode DisplayPort”, which allows the DP output to switch to native HDMI signaling. The fact that you’re getting a signal at all means they support that, but they may only support an HDMI revision that only allows up to 1080p, or possibly up to 1440p, even though the DP output supports much higher resolutions when using native DP signaling. Since the display has a DP input, try a regular DP cable and see what happens there. If that works, then since the display only has one DP input available. get an active DP to HDMI adapter/cable that supports HDMI 2.0 for the other one. Active adapters/cables contain a signal converter chip, which allows the DP output to continue using native DP signaling, so as long as your adapter supports HDMI 2.0, you should then be able to run max resolution. To make sure you get the correct type of active adapter/cable, look for one that mentions AMD EyeFinity support. There’s another type of active adapter meant to connect HDMI sources to DP inputs, which is NOT what you want here.
As for DDM, you can configure hotkeys to switch inputs, and even run a command-line command to do so if you just want a batch file you can click or something. Check DDM’s documentation for that. But first make sure to associate each upstream USB interface with the corresponding video interface you end up using, and then when you switch to a different video input, the USB interface will switch over too. Look at the U4919DW manual for that.
gishakka
3 Posts
0
July 4th, 2021 05:00
Thanks for that, I had just twigged to the problem likely to being with those cables when I read on the box that they only support 1920x1080. Will report back after different cables arrive.
gishakka
3 Posts
1
July 5th, 2021 23:00
@jphughan Thanks so much, 2 new active cables and presto! 5120x1440 was the recommended option.