https://bugs.freedesktop.org/show_bug.cgi?id=98146
--- Comment #4 from Mike Lothian mike@fireburn.co.uk --- Also are you using DRI2 or DRI3?
I saw most of those issues with DRI2 but they went away with DRI3
The tearing won't go away until the fencing work lands in the kernel's i915 driver - radeon should work with this but a few things still need to change for amdgpu
I find some of these issues sometimes go away by disabling and enabling the compositor inside the app - in kwin it's Shift + Alt + F12