VNCviewer - Debian Wiki
https://wiki.debian.org/VNCviewerAdd parameters in x11vnc command line. If you are using x11vnc, you may try different parameters, one at a time, to see if it fix the issue -noxfixes-nobell-nofb. Create / Specify display driver in /etc/X11/xorg.conf. This will force X to use the VESA display driver, which is slow for local display but works great for remote connection.
How to Install RealVNC VNC Viewer on Linux
https://linuxhint.com/install-realvnc-vnc-viewer-linuxInstalling VNC Viewer on Debian 10: RealVNC VNC Viewer is not available in the official package repository of Debian 10. So, you will have to download it from the official website of RealVNC and install it on your Debian 10 Linux distribution.. First, visit the official download page of RealVNC VNC Viewer from your favorite web browser.. Once the page loads, select DEB x64 from the …