Navi RX 5700 XT - hardware cursor + vsync causes stutter in compositors, games and even the cursor itself

[RNZ]

With AMD Navi RX 5600/5700 have stuttering in all accelerated applications.

affected: kernels <5.7

This bug is fixed in kernel 5.7 version

More details https://gitlab.freedesktop.org/drm/amd/-/issues/1001

Need backports for focal (20.04) release for kernel 5.4 or upgrade to kernel 5.7

Also I can't upgrade to 5.7 until zfs-dkms not support this kernel

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: linux-oem-20.04 5.6.0.1011.11
ProcVersionSignature: Ubuntu 5.6.0-1011.11-oem 5.6.14
Uname: Linux 5.6.0-1011-oem x86_64
NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair
ApportVersion: 2.20.11-0ubuntu27.2
Architecture: amd64
CasperMD5CheckResult: skip
CurrentDesktop: XFCE
Date: Sat Jun 13 22:48:23 2020
InstallationDate: Installed on 2015-05-01 (1870 days ago)
InstallationMedia: Ubuntu 15.04 "Vivid Vervet" - Release amd64 (20150422)
SourcePackage: linux-meta-oem-5.6
UpgradeStatus: Upgraded to focal on 2020-05-11 (32 days ago)
modified.conffile..etc.default.apport:
 # set this to 0 to disable apport, or to 1 to enable it
 # you can temporarily override this with
 # sudo service apport start force_start=1
 enabled=0
mtime.conffile..etc.default.apport: 2015-10-26T22:19:16.074320

[RNZ (renoizer)]

up
https://www.vsynctester.com/

https://imgur.com/rUALPsP.png

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.