Keyboard ghosting and rollover test
Hold the keys in your gaming or shortcut combination together. Compare the keys shown with the ones you are holding, then try a different order.
What the test received
Press and release a key to begin.
Observed combinations
- Held now
- None
- Largest overlap received
- —
Hold two or more keys together to see received combinations.
Some key combinations fail
Held now shows the positions this page received together. Peak records the largest overlap observed. Repeat the exact combinations you use.
Test each key separately first
Reset and complete a press and release for each key. Then add them one by one, noting which position is missing or unexpectedly appears.
Try a different order
Press the same combination in another order. Check whether it invokes a browser or system shortcut; those actions may take keys or focus away from this test.
Compare the app and connection mode
Try the combination in the app where it matters, then compare supported wired and wireless modes. Review active remaps or macros.
Check the documented rollover mode
Consult your exact model’s manual. Hardware design or its reporting mode can limit particular combinations. Use a supported mode or a different binding; choose another binding if needed.
Retest
Reset and repeat the exact combination in the same order. Compare current overlap with the keys you physically held, not just the peak number.
If it persists
Ask the manufacturer if a combination fails despite its documented support. Include the exact keys, order and connection mode, and distinguish a missing key from an unexpected extra key.