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Hector Martin

@exus1pl That's a driver issue, it has nothing to do with Wayland the protocol.

We don't support external displays at all yet and when we do it'll be one per port (no MST in this hardware, unless you use Thunderbolt) and it's all going to work as intended with Wayland.

2 comments
Will 💜

@marcan What is "using Thunderbolt" here, practically speaking? Using Thunderbolt bandwidth/DMA for a DisplayLink-esque device? Since any external GPU is out of the question because of IOMMU limitations (if I understand correctly), I'm not sure how Thunderbolt fits into the picture for single-port-multi-display functionality...

...unless you mean like a Thunderbolt dock mirroring the single video stream across all of its outputs... but a basic MST hub will do that on its own anyway. Am I missing something?

@marcan What is "using Thunderbolt" here, practically speaking? Using Thunderbolt bandwidth/DMA for a DisplayLink-esque device? Since any external GPU is out of the question because of IOMMU limitations (if I understand correctly), I'm not sure how Thunderbolt fits into the picture for single-port-multi-display functionality...

Hector Martin

@Skirmisher Thunderbolt tunnels DisplayPort, and these machines support two such tunnels per port. That's different from DisplayPort MST, which is not supported.

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