The current generation of Intel Arc branded graphics cards are part of what drm and Mesa refers to as DG2.
https://ark.intel.com/content/www/us/en/ark/products/codename/226095/products-formerly-alchemist.html In -current we now have Mesa 22.3 which has support for DG2. There is support in inteldrm but DG2 is not matched by default. The following diff matches it by default, as do versions of linux after 6.1. d2eae8e98d59 ("drm/i915/dg2: Drop force_probe requirement") I'm not sure if all the intel discrete gpu paths work. I don't have hardware to test. Index: sys/dev/pci/drm/i915/i915_pci.c =================================================================== RCS file: /cvs/src/sys/dev/pci/drm/i915/i915_pci.c,v retrieving revision 1.15 diff -u -p -U5 -r1.15 i915_pci.c --- sys/dev/pci/drm/i915/i915_pci.c 25 Jan 2023 01:51:59 -0000 1.15 +++ sys/dev/pci/drm/i915/i915_pci.c 29 Jan 2023 23:15:09 -0000 @@ -1076,11 +1076,10 @@ static const struct intel_device_info xe static const struct intel_device_info dg2_info = { DG2_FEATURES, XE_LPD_FEATURES, .__runtime.cpu_transcoder_mask = BIT(TRANSCODER_A) | BIT(TRANSCODER_B) | BIT(TRANSCODER_C) | BIT(TRANSCODER_D), - .require_force_probe = 1, }; static const struct intel_device_info ats_m_info = { DG2_FEATURES, NO_DISPLAY,