https://bugzilla.kernel.org/show_bug.cgi?id=201763
fin4478@hotmail.com changed:
What |Removed |Added ---------------------------------------------------------------------------- CC| |fin4478@hotmail.com
--- Comment #3 from fin4478@hotmail.com --- Before reporting, test with latest drivers. That means with these: https://cgit.freedesktop.org/~agd5f/linux/log/?h=drm-next-4.21-wip https://launchpad.net/~oibaf/+archive/ubuntu/graphics-drivers
Use the Oipaf ppa bionic version with Debian testing. Google how to use ppas in Debian. Disable vsync in Xfce Compositor settings. Disable Thunar thumbnails too. You can use my kernel config as base, add more drivers for your hardware with make xconfig.