I've built a Raspberry Pi to (hopefully) replace my old Windows laptop
. There were no technical issues in getting it running with OpenCPN
5.2.4. It's a 8Gb 4B and a 64Gb Sandisk "Extreme" SD card. I'm currently plugged in to my desktop monitor
running at 1920 x 1080; I'll probably use a 14" "portable" monitor
running at the same resolution on the boat
I've loaded the US RNCs and ENCs (and a few other free RNCs).
So far, the graphics performance with vector charts
is VERY slow. As an example, a single
click on the "+" icon to zoom in takes 3 - 4 seconds. This is linear; if I click twice it's 7 - 8 seconds. Dragging a chart is equally painful, with the added caveat that the wait cursor isn't visible while the screen
repaints, so it's hard to tell if the action is complete.
I'm convinced that there must be something in my setup that's the problem, but so far I haven't found it. I did try tweaking gpu_mem in /boot/config.txt with no noticeable change.
Any suggestions on how to improve this performance?