HDMI resolution with UHD 630 passthrough


New Member
Apr 19, 2023

Running on Proxmox 7.4-14 with all updates as of June 22, 2023

I got the integrated graphics passed through to Fedora 38 vm just fine with only enabling intel_iommu and adding the modules to config, very nice!

This is HP Elitedesk 800 G4 with i5-8600T CPU. It has two DP ports builtin and HDMI on this little add-on card.
Both DP ports work just fine, two 4k monitors connected. But if I swith the other monitor to use this HDMI port (the same two monitors connected, primary on DP, secondary on HDMI), I only get VGA resolution from HDMI port.

Any suggestions how to get 4k from this HDMI? If I boot Fedora 38 live image, HDMI+DP works fine on dual-4k mode.


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