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  1. Bug #1714178
  2. Comment #0

Comment 0 for bug 1714178

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ethan.hsieh (ethan.hsieh) wrote : Triple monitor display failed with Dell Dock (HiDPI) (modesetting)

Title: Triple monitor display failed with Dell Dock (HiDPI) (modesetting)

Summary: Triple monitor display failed with Dell Dock (HiDPI) (modesetting)

Steps:
1. a laptop with Built-in 4K LCD
2. Cold boot system with Dell Dock connected
3. Connect a 4K monitor to Dock
4. Connect 2nd 4K monitor to Dock
5. Go to [All Settings]=>[Displays] to have the following configuration.
Resolution: 4kx2k@60Hz (one Built-in LCD + two external monitors)
Mirror displays: disable

Expected results: Triple monitor display should works without issues
Actual results: Triple monitor display failed with Dell Dock

Additional information:
1. Linux distribution: Ubuntu 16.04+modesetting, 16.04.3, and 17.04
2. Laptop: Dell Precision 5520
3. Dell Business Thunderbolt Dock - TB16
https://goo.gl/vFDjpi