A user of Adélie Linux reported that modesetting wasn't working properly on their Intel i7-9700K-integrated UHD 630 GPU. Xorg.0.log showed:
[ 131.902] (EE) modeset(0): [DRI2] No driver mapping found for PCI device 0x8086 / 0x3e98
[ 131.902] (EE) modeset(0): Failed to initialize the DRI2 extension.Indeed, that PCI ID is missing from i965_pci_ids. Adding it fixed the issue and allowed the system to work with i965_dri under modesetting.