While trying to install a modern Linux (Ubuntu, Linux Mint and/or MX Linux) on older laptops I found that the video chipset on most older laptops is not compatible with OpenGL2. So Stellarium wouldn't start.

Solution:

• Create a launcher link on the desktop.
• Change the startup command from 'stellarium --startup-script=%f' to 'env LIBGL_ALWAYS_SOFTWARE=1 stellarium --startup-script=%f'

Now Stellarium (in my case version 20) starts, but let it be it works very slow. But that is anyway better then nothing!