Thanks for the responses :
1: Some more info, the more I zoom in the chart, the slower the panning gets
2: I have tried HW acceleration in OpenCPN , but as described above, panning gets even slower and maps tend to jump in unexpected directions. (often jump back to where I started the panning).
3: I checked glxinfo:
name of display: :0.0
libGL: screen 0 does not appear to be DRI2 capable
libGL: OpenDriver: trying /usr/lib/arm-linux-gnueabihf/dri/tls/swrast_dri.so
libGL: OpenDriver: trying /usr/lib/arm-linux-gnueabihf/dri/swrast_dri.so
display: :0 screen: 0
direct rendering: Yes
OpenGL renderer string: Software
I'm not that familar with OpenGL/glxinfo , but it looks as there may be something worth looking into in the above result ?
glxgears gives approx 36 fps
4: Yes , the below lines are in config.txt:
5: Crashes : When Building texture cache , progress suddenly stopped and system became unresponsive. Had to reboot.
Caleidoscope maps, I got that occasionally when texture caching was enabled.
In order to provide the backtraces, are we talking about OpenGL traces or OpenCPN traces ?
I need some guidance about which logs/backtraces to provide , and how to enable and/or find them.