rv200 video corruption caused by what? kernel? Xserver? DDX? Mesa?

[Felix Miata]

01:00.0 VGA compatible controller [0300]: Advanced Micro Devices, Inc. [AMD/ATI] RV200 [Radeon 7500/7500 LE] [1002:5157]

Debian Buster and Mageia 7 are OK, but with Fedora 30 and Tumbleweed with
kernels newer than 5.3.x, solid background and mouse pointer are all that
paint properly: http://fm.no-ip.com/SS/rv200corrupt.png

Is this a known problem? If not, whose bug tracker do I file this on, and
which component?

# Debian 10 Buster
ii libdrm-amdgpu1:i386       2.4.97-1        i386
ii libdrm-common             2.4.97-1        all ii libdrm-radeon1:i386       2.4.97-1        i386
ii libdrm2:i386              2.4.97-1        i386
ii libgl1-mesa-dri:i386     18.3.6-2+deb10u1 i386
ii libva-drm2:i386           2.4.0-1         i386
ii libdrm-radeon1:i386       2.4.97-1        i386
ii xserver-xorg-core         2:1.20.4-1      i386
ii xserver-xorg-video-radeon 1:19.0.1-1      i386
ii linux-image-4.19.0-8-686  4.19.98-1       i386  # OK Xorg video
# Mageia 7
libdricore1-9.2.4-1.mga4
libdri-drivers-20.0.1-1.mga7
libdrm2-2.4.100-1.mga7
libdrm_amdgpu1-2.4.100-1.mga7
libdrm_radeon1-2.4.100-1.mga7
libmesaegl1-20.0.1-1.mga7
libmesagl1-20.0.1-1.mga7
libmesaglu1-9.0.0-8.mga7
mesa-20.0.1-1.mga7
radeontool-1.6.3-9.mga7
x11-driver-video-ati-19.1.0-1.mga7
x11-server-xorg-1.20.7-1.mga7
kernel-desktop-5.3.13-2.mga7-1-1.mga7	# OK
kernel-desktop-5.4.17-1.mga7-1-1.mga7	# OK Xorg video
# Fedora 30
libdrm-2.4.100-1.fc30.i686
mesa-dri-drivers-19.1.8-1.fc30.i686
mesa-libEGL-19.1.8-1.fc30.i686
mesa-libgbm-19.1.8-1.fc30.i686
mesa-libGL-19.1.8-1.fc30.i686
mesa-libglapi-19.1.8-1.fc30.i686
mesa-libGLU-9.0.0-17.fc30.i686
xorg-x11-drv-ati-19.0.1-2.fc30.i686
xorg-x11-server-Xorg-1.20.6-1.fc30.i686
kernel-core-5.3.7-200.fc30.i686		# OK
kernel-core-5.4.19-100.fc30.i686	# Corrupt Xorg video
# openSUSE Tumbleweed 2020030322
Mesa-20.0.1-245.1.i586
Mesa-dri-20.0.1-245.1.i586
Mesa-gallium-20.0.1-245.1.i586
Mesa-libEGL1-20.0.1-245.1.i586
Mesa-libGL1-20.0.1-245.1.i586
Mesa-libglapi0-20.0.1-245.1.i586
libdrm2-2.4.100-2.2.i586
libdrm_amdgpu1-2.4.100-2.2.i586
libdrm_radeon1-2.4.100-2.2.i586
xf86-video-ati-19.1.0-2.2.i586
xorg-x11-server-1.20.7+0-3.1.i586
kernel-default-5.3.12-2.2.i586		# OK
kernel-default-5.4.14-2.1.i586		# corrupt Xorg video
-- 
Evolution as taught in public schools is religion, not science.

 Team OS/2 ** Reg. Linux User #211409 ** a11y rocks!

Felix Miata  ***  http://fm.no-ip.com/