3rd Monitor HDMI Display Resolution on HP USB-C Dock G4

[Joe-88]

I have 3 monitors connected to a HP USB-C Dock G4 connected to a Elitebook X360 1020 G2.  All 3 monitors have native FHD 1920 x 1080 resolution.  The first 2 monitors connected via DisplayPort adapters were working fine, but the third display connected to HDMI will only drive lower non-native resolutions like 640x480, 800x600 & 1280x720. 

The specs on this dock are supposed to run 3 monitors at 1920x1080.  I've updated drivers & firmware so not sure what else to check.  

[cjsmith_watco]

Hey Joe.

I have the exact same set up as you. I have the same dock and laptop but have ran in to the same issue.

For now, I have been able to mess with the settings and get my 3 screens to all run 1280 x 720. Not as good but better than one of them being 600x480 or whatever it is.

I had seen in the past on another forum that it is because the USB - C cable that comes with these docks don't have enough bandwidth to support all 3 external monitors at 1920 x 1280.

I am actually looking for a high speed USB - C cable to order and I will let you know the results.

[AAAAAAAABBA]

I was able to make it work with an elitebook, but only after plugging in the HDMI into the actual computer with the 2 display ports being used for the other two monitors.  Not great, but a workable solution.

[BrechtM]

intel or AMD based? I'm having similar issues on an elitebook 755 g5 with ryzen 7. Downgrading video drivers to 26.20.11018.1001 fixes the issue.

[TryToDoMybest]

Hello

HP USB-C Dock G4 could support up to 3 1920x1080 displays if in the HP computer BIOS you have a correct setting.

Press F10 at computer power-on, to enter BIOS setup GUI.

search for this parameter: "Enable High Resolution mode when connected to a USB-C DP alt mode dock", check the box to enable this function. save BIOS setting and reboot windows.

Try again to set all monitors to 1920x1080.

if you dont find "Enable High Resolution mode when connected to a USB-C DP alt mode dock" , try to update the BIOS to latest version.

BIOS manual for Commercial products:  http://h10032.www1.hp.com/ctg/Manual/c06399361

Bye