2020-05-15, 04:20 PM
I saw something similar a while back. I think it was related to something eating up a lot of memory, might've been SignalK.
I reinstalled with only the plugins I actually needed, and the issue went away (I had previously tried basically all of them).
One other thing I noticed is that the GUI on my "headless" Pi becomes very slow after left unattended for a while. The mouse will even move very slowly, and clicks will only register after a few seconds. While it's doing that, I can SSH into it no problem, the SignalK server responds quickly, and top shows almost no CPU usage. After digging a little, I noticed that most of the RAM was allocated to cache (which is a good thing, it makes your frequent operations much snappier), and the GUI became snappy again after a few minutes.
I suspect what's happening is Linux seeing that the GUI programs aren't much used, so it puts their RAM in swap to make room for more useful stuff (like SignalK server and InfluxDB in my case). Going back to the GUI is a bit slow while Linux moves its memory back into RAM.
I also noticed some instability when allocating more video RAM (+ openGL acceleration) on my other Pi that runs OpenCPN, so maybe try changing these settings back to default if you've messed with them.
I reinstalled with only the plugins I actually needed, and the issue went away (I had previously tried basically all of them).
One other thing I noticed is that the GUI on my "headless" Pi becomes very slow after left unattended for a while. The mouse will even move very slowly, and clicks will only register after a few seconds. While it's doing that, I can SSH into it no problem, the SignalK server responds quickly, and top shows almost no CPU usage. After digging a little, I noticed that most of the RAM was allocated to cache (which is a good thing, it makes your frequent operations much snappier), and the GUI became snappy again after a few minutes.
I suspect what's happening is Linux seeing that the GUI programs aren't much used, so it puts their RAM in swap to make room for more useful stuff (like SignalK server and InfluxDB in my case). Going back to the GUI is a bit slow while Linux moves its memory back into RAM.
I also noticed some instability when allocating more video RAM (+ openGL acceleration) on my other Pi that runs OpenCPN, so maybe try changing these settings back to default if you've messed with them.