I think I have the same issue. Ubuntu 20.04.
dmesg
[350143.716757] radeon 0000:01:05.0: ring 0 stalled for more than 10220msec
[350143.716768] radeon 0000:01:05.0: GPU lockup (current fence id
0x0000000009a06e34 last fence id 0x0000000009a06e8e on ring 0)
sudo lshw -C display
*-display
description: VGA compatible controller
product: RS780L [Radeon 3000]
vendor: Advanced Micro Devices, Inc. [AMD/ATI]
physical id: 5
bus info: pci@0000:01:05.0
version: 00
width: 32 bits
clock: 33MHz
capabilities: pm msi vga_controller bus_master cap_list rom
configuration: driver=radeon latency=0
resources: irq:18 memory:d0000000-dfffffff ioport:d000(size=256)
memory:fe9f0000-fe9fffff memory:fe800000-fe8fffff memory:c0000-dffff
sudo dpkg -l | grep xserver-xorg-video
ii xserver-xorg-video-all
1:7.7+19ubuntu14 amd64 X.Org X server --
output driver metapackage
ii xserver-xorg-video-amdgpu 19.1.0-1
amd64 X.Org X server -- AMDGPU display driver
ii xserver-xorg-video-ati 1:19.1.0-1
amd64 X.Org X server -- AMD/ATI display
driver wrapper
ii xserver-xorg-video-fbdev
1:0.5.0-1ubuntu1 amd64 X.Org X server -- fbdev
display driver
ii xserver-xorg-video-intel
2:2.99.917+git20200226-1 amd64 X.Org X server -- Intel
i8xx, i9xx display driver
ii xserver-xorg-video-nouveau 1:1.0.16-1
amd64 X.Org X server -- Nouveau display driver
ii xserver-xorg-video-nvidia-460
460.91.03-0ubuntu0.20.04.1 amd64 NVIDIA binary Xorg
driver
ii xserver-xorg-video-qxl
0.1.5+git20200331-1 amd64 X.Org X server -- QXL
display driver
ii xserver-xorg-video-radeon 1:19.1.0-1
amd64 X.Org X server -- AMD/ATI Radeon
display driver
ii xserver-xorg-video-vesa 1:2.4.0-2
amd64 X.Org X server -- VESA display driver
ii xserver-xorg-video-vmware 1:13.3.0-3
amd64 X.Org X server -- VMware display driver
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https://bugs.launchpad.net/bugs/1863390
Title:
GPU lockup ring 0 stalled for more than X msec
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