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Known problem.Known problem. User has to manually terminate vlc after each use. killall -s 9 vlcThe fix:The problem lies in the video output setting for VLC. * Tools -> Preferences -> Video -> OutputLook for the dropdown list labeled Output. The setting that fixes the problem for Linux Mint 20 seems to be "XVideo output (XCB)" and be sure to click SAVE.For other distributions users have reported that choosing "OpenGL" is the solution. You may have to try different options. The "XVideo output (XCB)" option has been verified to resolve the problem on Mint 20 with AMD GPU.