It's possible that Xorg clones the outputs by enabling multiple CRTCs
(instead of trying to attach multiple connectors to a single CRTC).
It's also possible that the driver supports cloning connectors but
doesn't advertise it properly, possible_clones is known to be
unreliable.
Hi Pekka,
thanks for pointing me to "drm_info".
I built and installed it and indeed, all Encoder entries look
like this:
...
├───Encoders
│ ├───Encoder 0
│ │ ├───Object ID: 94
│ │ ├───Type: TMDS
│ │ ├───CRTCS: {0, 1, 2}
│ │ └───Clones: {0}
...
where the index ranges from 0 to
