Okay, yeah, Xfce's window manager is notorious for screen tearing.
Follow this guide on disabling xfwm and setting up Compton: http://duncanlock.net/blog/2013/06/07/how-to-switch-to-compton-for-beautiful-tear-free-compositing-in-xfce/
That should resolve your issue.
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From: Platform Independent Linux List! [mailto:[log in to unmask]] On Behalf Of Eben King
Sent: Monday, November 06, 2017 12:06 PM
To: [log in to unmask]
Subject: Re: video card selection
Eben King wrote on Monday, November 06, 2017 10:56 AM
> I currently see some tearing on 720 or 1080 videos full-screen on a
> 1920x1200 HDMI monitor.
On 11/06/17 11:01, Wark,Geoffrey T wrote:
> The tearing is probably just a problem with your compositor. What
> distro/DE are you using?
Ubuntu something LTS (kernel 4.4.0-97-generic), xorg 1.18.4, XFCE 4.12, MPlayer 1.2.1 .
-eben [log in to unmask]
The problem with defending ... the English language is that [it] is about as pure as a cribhouse whore. We don't just borrow words; on oc- casion, English has pursued other languages down alleyways to beat them unconscious and riffle their pockets for new vocabulary. --James Nicoll