dtoverlay=vc4-kms-dpi-generic
The primary signal is desiredSize on the controller. It can be positive (wants data), zero (at capacity), negative (over capacity), or null (closed). Producers are supposed to check this value and stop enqueueing when it's not positive. But there's nothing enforcing this: controller.enqueue() always succeeds, even when desiredSize is deeply negative.
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then the += will modify the list, and then raise an exception because you can’t assign to that tuple item because the tuple is immutable, but the list will have been mutated.
Екатерина Щербакова (ночной линейный редактор)