Hello,
i initiated playback of the video in vlc player revision 3.0.12-1-0-gd147bb5e7e via command line and after some seconds, the screen got blank and XFCE 4.16 session was reset including all apps terminated:
[St dub 14 14:56:54 2021] [drm:gfx_v9_0_priv_reg_irq [amdgpu]] *ERROR* Illegal register access in command stream
[St dub 14 14:57:00 2021] [drm:amdgpu_dm_atomic_commit_tail [amdgpu]] *ERROR* Waiting for fences timed out!
[St dub 14 14:57:05 2021] [drm:amdgpu_job_timedout [amdgpu]] *ERROR* ring gfx timeout, signaled seq=135012021, emitted seq=135012024
[St dub 14 14:57:05 2021] [drm:amdgpu_job_timedout [amdgpu]] *ERROR* Process information: process vlc pid 3930929 thread vlc:cs0 pid 3930957
[St dub 14 14:57:05 2021] amdgpu 0000:0a:00.0: amdgpu: GPU reset begin!
[St dub 14 14:57:05 2021] [drm] free PSP TMR buffer
[St dub 14 14:57:05 2021] amdgpu 0000:0a:00.0: amdgpu: MODE2 reset
[St dub 14 14:57:05 2021] amdgpu 0000:0a:00.0: amdgpu: GPU reset succeeded, trying to resume
[St dub 14 14:57:05 2021] [drm] PCIE GART of 1024M enabled (table at 0x000000F400900000).
[St dub 14 14:57:05 2021] [drm] VRAM is lost due to GPU reset!
[St dub 14 14:57:05 2021] [drm] PSP is resuming...
[St dub 14 14:57:05 2021] [drm] reserve 0x400000 from 0xf41f800000 for PSP TMR
[St dub 14 14:57:05 2021] amdgpu 0000:0a:00.0: amdgpu: RAS: optional ras ta ucode is not available
[St dub 14 14:57:05 2021] amdgpu 0000:0a:00.0: amdgpu: RAP: optional rap ta ucode is not available
[St dub 14 14:57:05 2021] amdgpu 0000:0a:00.0: amdgpu: SMU is resuming...
[St dub 14 14:57:05 2021] amdgpu 0000:0a:00.0: amdgpu: SMU is resumed successfully!
[St dub 14 14:57:05 2021] [drm] kiq ring mec 2 pipe 1 q 0
[St dub 14 14:57:05 2021] [drm] DMUB hardware initialized: version=0x01000000
[St dub 14 14:57:05 2021] [drm] VCN decode and encode initialized successfully(under DPG Mode).
[St dub 14 14:57:05 2021] [drm] JPEG decode initialized successfully.
[St dub 14 14:57:05 2021] amdgpu 0000:0a:00.0: amdgpu: ring gfx uses VM inv eng 0 on hub 0
[St dub 14 14:57:05 2021] amdgpu 0000:0a:00.0: amdgpu: ring comp_1.0.0 uses VM inv eng 1 on hub 0
[St dub 14 14:57:05 2021] amdgpu 0000:0a:00.0: amdgpu: ring comp_1.1.0 uses VM inv eng 4 on hub 0
[St dub 14 14:57:05 2021] amdgpu 0000:0a:00.0: amdgpu: ring comp_1.2.0 uses VM inv eng 5 on hub 0
[St dub 14 14:57:05 2021] amdgpu 0000:0a:00.0: amdgpu: ring comp_1.3.0 uses VM inv eng 6 on hub 0
[St dub 14 14:57:05 2021] amdgpu 0000:0a:00.0: amdgpu: ring comp_1.0.1 uses VM inv eng 7 on hub 0
[St dub 14 14:57:05 2021] amdgpu 0000:0a:00.0: amdgpu: ring comp_1.1.1 uses VM inv eng 8 on hub 0
[St dub 14 14:57:05 2021] amdgpu 0000:0a:00.0: amdgpu: ring comp_1.2.1 uses VM inv eng 9 on hub 0
[St dub 14 14:57:05 2021] amdgpu 0000:0a:00.0: amdgpu: ring comp_1.3.1 uses VM inv eng 10 on hub 0
[St dub 14 14:57:05 2021] amdgpu 0000:0a:00.0: amdgpu: ring kiq_2.1.0 uses VM inv eng 11 on hub 0
[St dub 14 14:57:05 2021] amdgpu 0000:0a:00.0: amdgpu: ring sdma0 uses VM inv eng 0 on hub 1
[St dub 14 14:57:05 2021] amdgpu 0000:0a:00.0: amdgpu: ring vcn_dec uses VM inv eng 1 on hub 1
[St dub 14 14:57:05 2021] amdgpu 0000:0a:00.0: amdgpu: ring vcn_enc0 uses VM inv eng 4 on hub 1
[St dub 14 14:57:05 2021] amdgpu 0000:0a:00.0: amdgpu: ring vcn_enc1 uses VM inv eng 5 on hub 1
[St dub 14 14:57:05 2021] amdgpu 0000:0a:00.0: amdgpu: ring jpeg_dec uses VM inv eng 6 on hub 1
[St dub 14 14:57:05 2021] amdgpu 0000:0a:00.0: amdgpu: recover vram bo from shadow start
[St dub 14 14:57:05 2021] amdgpu 0000:0a:00.0: amdgpu: recover vram bo from shadow done
[St dub 14 14:57:05 2021] [drm] Skip scheduling IBs!
[St dub 14 14:57:05 2021] [drm] Skip scheduling IBs!
[St dub 14 14:57:05 2021] [drm] Skip scheduling IBs!
[St dub 14 14:57:05 2021] [drm] Skip scheduling IBs!
[St dub 14 14:57:05 2021] [drm] Skip scheduling IBs!
[St dub 14 14:57:05 2021] [drm] Skip scheduling IBs!
[St dub 14 14:57:05 2021] [drm] Skip scheduling IBs!
[St dub 14 14:57:05 2021] [drm] Skip scheduling IBs!
[St dub 14 14:57:05 2021] [drm] Skip scheduling IBs!
[St dub 14 14:57:05 2021] [drm] Skip scheduling IBs!
[St dub 14 14:57:05 2021] [drm] Skip scheduling IBs!
[St dub 14 14:57:05 2021] [drm] Skip scheduling IBs!
[St dub 14 14:57:05 2021] [drm] Skip scheduling IBs!
[St dub 14 14:57:05 2021] [drm] Skip scheduling IBs!
[St dub 14 14:57:05 2021] [drm] Skip scheduling IBs!
[St dub 14 14:57:05 2021] [drm] Skip scheduling IBs!
[St dub 14 14:57:05 2021] [drm] Skip scheduling IBs!
[St dub 14 14:57:05 2021] [drm] Skip scheduling IBs!
[St dub 14 14:57:05 2021] [drm] Skip scheduling IBs!
[St dub 14 14:57:05 2021] [drm] Skip scheduling IBs!
[St dub 14 14:57:05 2021] [drm] Skip scheduling IBs!
[St dub 14 14:57:05 2021] [drm] Skip scheduling IBs!
[St dub 14 14:57:05 2021] [drm] Skip scheduling IBs!
[St dub 14 14:57:05 2021] [drm] Skip scheduling IBs!
[St dub 14 14:57:05 2021] [drm] Skip scheduling IBs!
[St dub 14 14:57:05 2021] [drm] Skip scheduling IBs!
[St dub 14 14:57:05 2021] [drm] Skip scheduling IBs!
[St dub 14 14:57:05 2021] [drm] Skip scheduling IBs!
[St dub 14 14:57:05 2021] [drm] Skip scheduling IBs!
[St dub 14 14:57:05 2021] [drm] Skip scheduling IBs!
[St dub 14 14:57:05 2021] [drm] Skip scheduling IBs!
[St dub 14 14:57:05 2021] [drm] Skip scheduling IBs!
[St dub 14 14:57:05 2021] [drm] Skip scheduling IBs!
[St dub 14 14:57:05 2021] [drm] Skip scheduling IBs!
[St dub 14 14:57:05 2021] [drm] Skip scheduling IBs!
[St dub 14 14:57:05 2021] [drm] Skip scheduling IBs!
[St dub 14 14:57:05 2021] [drm] Skip scheduling IBs!
[St dub 14 14:57:05 2021] [drm] Skip scheduling IBs!
[St dub 14 14:57:05 2021] [drm] Skip scheduling IBs!
[St dub 14 14:57:05 2021] [drm] Skip scheduling IBs!
[St dub 14 14:57:05 2021] [drm] Skip scheduling IBs!
[St dub 14 14:57:05 2021] [drm] Skip scheduling IBs!
[St dub 14 14:57:05 2021] [drm] Skip scheduling IBs!
[St dub 14 14:57:05 2021] [drm] Skip scheduling IBs!
[St dub 14 14:57:05 2021] [drm] Skip scheduling IBs!
[St dub 14 14:57:05 2021] [drm] Skip scheduling IBs!
[St dub 14 14:57:05 2021] amdgpu 0000:0a:00.0: amdgpu: GPU reset(2) succeeded!
[St dub 14 14:57:05 2021] [drm] Skip scheduling IBs!
[St dub 14 14:57:05 2021] [drm] Skip scheduling IBs!
[St dub 14 14:57:05 2021] [drm] Skip scheduling IBs!
[St dub 14 14:57:05 2021] [drm] Skip scheduling IBs!
[St dub 14 14:57:05 2021] [drm:amdgpu_cs_ioctl [amdgpu]] *ERROR* Failed to initialize parser -125!
[St dub 14 14:57:05 2021] [drm:amdgpu_cs_ioctl [amdgpu]] *ERROR* Failed to initialize parser -125!
[St dub 14 14:57:05 2021] [drm:amdgpu_cs_ioctl [amdgpu]] *ERROR* Failed to initialize parser -125!
$ coredumpctl;uname -r;inxi -G
TIME PID UID GID SIG COREFILE EXE
Wed 2021-04-14 10:32:47 CEST 3158739 1000 1001 5 present /usr/bin/app1
Wed 2021-04-14 14:15:37 CEST 3872532 1000 1001 11 present /usr/bin/vlc
Wed 2021-04-14 14:57:07 CEST 2012 0 0 6 present /usr/lib/Xorg
Wed 2021-04-14 14:57:10 CEST 3347042 1000 1001 7 present /losslesscut
Wed 2021-04-14 14:57:10 CEST 3347340 1000 1001 7 present /losslesscut
Wed 2021-04-14 14:57:11 CEST 2475333 1000 1001 7 present /losslesscut
Wed 2021-04-14 14:57:11 CEST 2475716 1000 1001 7 present /losslesscut
Wed 2021-04-14 14:57:12 CEST 3347053 1000 1001 7 present /losslesscut
Wed 2021-04-14 14:57:12 CEST 2475366 1000 1001 7 present /losslesscut
Wed 2021-04-14 14:57:13 CEST 3612660 1000 1001 5 present /usr/bin/app1
5.10.23-1-MANJARO
Graphics: Device-1: Advanced Micro Devices [AMD/ATI] Renoir driver: amdgpu v: kernel
Display: x11 server: X.Org 1.20.10 driver: loaded: amdgpu,ati unloaded: modesetting resolution: 1920x1080~60Hz
OpenGL: renderer: AMD RENOIR (DRM 3.40.0 5.10.23-1-MANJARO LLVM 11.1.0) v: 4.6 Mesa 21.0.1
How to proceed please?