kernel-packages team mailing list archive

[Timo Aaltonen <tjaalton@xxxxxxxxxx>]

Public bug reported:

Turns out that Displayport Multi-Stream Transport has not been
implemented for Skylake, causing blank screen issues (now that hangs
have been fixed..) when plugging external displays to outputs connected
to the MST hub. Disabling DP MST allows at least one of the outputs to
work, if there are several behind the hub.

** Affects: linux (Ubuntu)
     Importance: Undecided
         Status: Triaged

** Affects: linux (Ubuntu Vivid)
     Importance: Undecided
     Assignee: Timo Aaltonen (tjaalton)
         Status: Triaged

** Affects: linux (Ubuntu Wily)
     Importance: Undecided
         Status: Triaged

** Also affects: linux (Ubuntu Wily)
   Importance: Undecided
       Status: New

** Also affects: linux (Ubuntu Vivid)
   Importance: Undecided
       Status: New

** Changed in: linux (Ubuntu Vivid)
       Status: New => Triaged

** Changed in: linux (Ubuntu Vivid)
     Assignee: (unassigned) => Timo Aaltonen (tjaalton)

** Changed in: linux (Ubuntu Wily)
       Status: New => Triaged

** Changed in: linux (Ubuntu)
       Status: New => Triaged

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https://bugs.launchpad.net/bugs/1532127

Title:
  [SKL] Disable DP MST

Status in linux package in Ubuntu:
  Triaged
Status in linux source package in Vivid:
  Triaged
Status in linux source package in Wily:
  Triaged

Bug description:
  Turns out that Displayport Multi-Stream Transport has not been
  implemented for Skylake, causing blank screen issues (now that hangs
  have been fixed..) when plugging external displays to outputs
  connected to the MST hub. Disabling DP MST allows at least one of the
  outputs to work, if there are several behind the hub.

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