Can't use Lenovo monitor over DisplayPort from HP Pavilion

[ps200306]

I have a Lenovo ThinkVision P40W-20 5K monitor. I'm trying to connect it to a HP Pavilion 15-eh1505sa (6M1S0EA) laptop running Windows 11 Home. The laptop has a Ryzen processor with integrated AMD Radeon Graphics and has a DisplayPort 1.4 port as well as HDMI. Upon plugging it in to the DisplayPort, the monitor is detected as a "Generic Monitor" and resolution is limited to 640x480. I've tried everything I could think of, including using a Custom Resolution Utility to change the Windows registry. Nothing works. The laptop is brand new, fully updated, and all drivers are up to date.

When I connect via HDMI the monitor is detected and everything works, however HDMI 2.0 is limited to 4K resolution so I am not able to use the monitor to its fullest. I've previously connected a HP Spectre x360 16-f1501na with discrete Intel Arc A370M Graphics and Thunderbolt ports, and this works ok to drive 5K resolution on the monitor.

Is there anything I can do to get 5K resolution over DisplayPort 1.4 ?

[sandytechy20]

@ps200306 

Welcome to the HP support community.

I understand that you are trying to connect an external monitor to your notebook, I am glad to assist you.

Update the Bios, chipset, and drivers using HP Support Assistant.

Download and run the HP Support Assistant from this Link: Click here

• HPSA will automatically search for all the latest drivers for your Notebook
• Click My devices in the top menu, and then click Updates in the My PC or My notebook pane.
• 
• Click Check for updates and messages to scan for new updates.
• 
• Review the list of updates. Updates with a yellow information icon are recommended. Updates with a blue information icon are optional.
• Click the update name for a description, version number, and file size.
• Select the box next to any updates you want to install, and then click Download and install.

Also, ensure Windows is up to date.

• Select the Start  button, and then go to Settings  > Update & security  > Windows Update , and select Check for updates. If Windows Update says your device is up to date, you have all the updates that are currently available

Refer to this HP document for further assistance:- Click here

Let me know how it goes.

To thank me for my efforts to help you, please mark my post as an accepted solution so that it benefits several others.

Cheers.