Both Debian and Ubuntu mate images can happen the "hang" situation.
Only mouse movement shows on the screen, others on the screen don't change.. during 1~2 minutes.
When back to normal, the previous mouse clicks response (windows minimum or maximum).
I wonder it's the temperature issue. It's too high, then CPU down speed to very slowly and wait "cool".
So, is there small application can link the LED flush to CPU speed?