I can't get my 'Matrix' screensaver to work.
Here are the steps I used to follow which made the screensaver 'Matrix' work.
Screensaver Matrix: Linux Mint > Menu > System > Package Manager > Password: p... > OK > Rebuilding search index: xscreensaver > (tick) xscreensaver, xscreensaver-data, xscreensaver-gl, xscreensaver-gl-extra > Apply > Apply > Close > Linux Mint > Menu > Applications > Preferences > Screensaver Properties > Mode: Only One Screen Saver: GLMatrix.
Now when I select Matrix and Preview to check, I see errors:
Xlib: extension "GLX" missing on display ":0.0".
glmatrix: root window's visual 0x9c does not support the GLX extension.
xscreensaver: 16:37:00 0: child pid 21517 (<unknown>) exited abnormally (code 0).