For those that HATE it when the screen flickers of you’re adjusting volume in VLC media player while playing a video or movie, here’s the fix that worked for me:
To go tools, Preferences, Video button, Output …and select " XvIDEO (XCB)" as the option via the drop down option. restart vlc.
I don’t remember needing to do this in Windows, but many linux distro’s needed this adjustment (shruggs). I’d still rather stay in Linux. …In the immortal words of MLK jr. " Free at last…free at last…Thank God almight…FREE at last."
Mint 20 cinnamon 64 bit here
rx 580 8GB sapphire nitro+ vid card
4790k ( until the next upcoming gen of zen 3 desktop cpu’s arrive)
Hope this helps. Cheers.