Internal display at native resolution

How it tests

The quick pass finds the internal panel connector (eDP/LVDS/DSI), its preferred mode, the console framebuffer size and the panel size in the catalog. A hands-on test of its own then draws a black-and-white test pattern, one of six, and the tester names it; then a new one. Two rounds, no retry.

How it decides

Quick pass: supported at the preferred mode on a KMS driver, not below the catalog's panel size; partial below the preferred mode or the panel; failed when the panel isn't driven; not tested with nomodeset. Hands-on: both patterns named keeps the verdict (picture confirmed, a challenge); a wrong name or “The picture is wrong” turns supported into partial; a skip keeps the quick pass's verdict, noted as not checked.

How sure it is

The kernel's facts give the mode; naming two patterns shows the picture is whole. A blind guess passes 1 in 30.

On a real Mac

• On a MacBook Air (13-inch, Mid 2012): flat stripes, then nested boxes, both named.

What could mislead it

• Could pass when it shouldn'tThe tester skips the pattern test, so a split or garbled picture keeps the quick pass's supported (the evidence says not checked).
• Could fail when it shouldn'tA Mac missing from the catalog's panel list falls back to the EDID, which on 5K iMacs asks for less than the panel.