Hi sailoog, thanks for your reply !
- The issue appeared when the option box was not checked. (i.e. no quilting). In fact I started from a position with a large scale available (e.g. an harbour) at the limit of OverZoom, and then zoomed out, and/or panned, the map did not draw (or maybe very slowly) in areas where the available scale is smaller (see capture, if I can join it !). The crash happened when zooming and panning repeatedly (I'm using CM93 - 2015).
- Typing openCPN in a terminal gives me the following message :
Xlib: extension "RANDR" missing on display ":1.0".
- My raspberry is a Pi2, I gave 128 M of ram to the GPU, no overclocking. I use it through SSH and tightvncserver as remote
access from my window workstation.