Amarok4

you mean vnc?

I already wrote. The temperature is normal but the problem remains. I had a copy of an almost clean system and ran it all night yesterday. The system did not hang but vnc stopped working after 6 hours. Interestingly, the session is active, the log says nothing about errors and you can't connect. Restarting systemctl tightvncserver also doesn't help, is it a port sharing problem? P.S. Before installing the fan, the temperature was up to 72C!

I installed a large fan and the temperature is now max 55C

Thank you very much for your answer. I also enlarged the font. I just don't know why it freezes completely or restarts xserver. It works for several hours or stops after a few minutes. It works all the time when I'm not using the app.

I have exactly the same device and I'm having trouble setting the resolution. The default is 1920x1080. I would like less because I have a preview via VNC on the tablet and the screen is too big and after a few hours of displaying the device freezes. Ram memory 41% temperature 40-50C, because I installed cooling for it. After typing 'xrandr' it responds " failed to get size of gamma for output default Screen 0: minimum 1920x1080, current 1920x1080, maximum 1920x1080 default connected 1920x1080+0+0 0mmx0mm 1920x1080 0.00* "