The review asked for two things when the last CRTC disappears: push the empty
topology to consumers, and stop advertising the removed displays. Only the first
was done. The positive-TTL refresh still discarded an empty probe result and kept
the previous list, so on an idle host -- where there is no live stream to carry
the hotplug push -- enumeration kept reporting displays that were gone, exactly
as described. It now transitions to Unavailable on an empty result, matching the
hotplug path, while a failed probe (transient open/EACCES, not evidence the
displays are gone) keeps the verdict and only restamps it.
Mariano Abad
f71474ca4c