Back to the Asrock boards:   J3455B-ITX: works J3455-M: works J3455-ITX: i915 driver fails which explains why /dev/dri is missing: ===== trigger device plug event ===== [ 219.079271] BUG: unable to handle kernel NULL pointer dereference at (null) [ 219.087187] IP: [< (null)>] (null) [ 219.092288] PGD 1783da067 PUD 1783db067 PMD 0 [ 219.096825] Oops: 0010 [#1] PREEMPT SMP [ 219.100846] Modules linked in: i915(E+) drm_kms_helper(E) sy
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