Comment 13 for bug 1863390

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