Buster and legacy Nvidia problem

problems ↓

• glxinfo exists with error
• mpv errors with ‘no glx context’
• tearing on playback with mpv, tearing all over the place (browser)

solution ↓

Replace in /etc/X11/xorg.conf, from

Section "Files"
EndSection

to

Section "Files"
    ModulePath     "/usr/lib/xorg/modules/linux"
    ModulePath     "/usr/lib/xorg/modules"
EndSection