System Information
Ubuntu 17.10 Nvidia GeForce 820M
Blender Version
Broken: 2-79
Short description of error
No display of an added strip clip to VSE with undistorted clip flag and proxy created from motion tracking layout.
Exact steps for others to reproduce the error
Open blender, create a new project
Switch into motion tracking layout
Import a movie clip (es: clip001.avi)
Set lens distortion In lens properties
Set render undistorted in display properties
Flag proxy/timecode and set 25% (build original) and 25% (build undistorted)
Press build proxy / timecode
Switch to Video editing layout
Add "clip" (clip001.avi) to sequencer (from motion tracking)
Check Filter/Undistort clip (preview works)
In Scene/preview render /view settings select "Proxy size 25%" (preview works)
-> No display in preview !!!
Uncheck Filter/Undistort clip (preview works with proxy distorted)