I have the same issue, but only when doing GPU intensive tasks at larger resolutions. Just simple webbrowsing and watching Videos works just fine on my external 4k@144hz.
But unlike your example with the glitches, my screen just stays off and everything hangs forever. I assume the hang is caused by a different bug related to my dock that I’ve mentioned in another thread. Any of this happens with and without gaming mode in bios.
[ 1788.822528] gmc_v11_0_process_interrupt: 55 callbacks suppressed
[ 1788.822545] amdgpu 0000:c1:00.0: amdgpu: [gfxhub] page fault (src_id:0 ring:24 vmid:2 pasid:32772, for process qemu-system-x86 pid 3344 thread qemu-syste:cs0 pid 3369)
[ 1788.822558] amdgpu 0000:c1:00.0: amdgpu: in page starting at address 0x0000aaab42697000 from client 10
[ 1788.822564] amdgpu 0000:c1:00.0: amdgpu: GCVM_L2_PROTECTION_FAULT_STATUS:0x00201431
[ 1788.822568] amdgpu 0000:c1:00.0: amdgpu: Faulty UTCL2 client ID: SQC (data) (0xa)
[ 1788.822572] amdgpu 0000:c1:00.0: amdgpu: MORE_FAULTS: 0x1
[ 1788.822576] amdgpu 0000:c1:00.0: amdgpu: WALKER_ERROR: 0x0
[ 1788.822579] amdgpu 0000:c1:00.0: amdgpu: PERMISSION_FAULTS: 0x3
[ 1788.822582] amdgpu 0000:c1:00.0: amdgpu: MAPPING_ERROR: 0x0
[ 1788.822585] amdgpu 0000:c1:00.0: amdgpu: RW: 0x0
[ 1788.822599] amdgpu 0000:c1:00.0: amdgpu: [gfxhub] page fault (src_id:0 ring:24 vmid:2 pasid:32772, for process qemu-system-x86 pid 3344 thread qemu-syste:cs0 pid 3369)
[ 1788.822606] amdgpu 0000:c1:00.0: amdgpu: in page starting at address 0x000000003f800000 from client 10
[ 1788.822610] amdgpu 0000:c1:00.0: amdgpu: GCVM_L2_PROTECTION_FAULT_STATUS:0x00000000
[ 1788.822614] amdgpu 0000:c1:00.0: amdgpu: Faulty UTCL2 client ID: CB/DB (0x0)
[ 1788.822617] amdgpu 0000:c1:00.0: amdgpu: MORE_FAULTS: 0x0
[ 1788.822620] amdgpu 0000:c1:00.0: amdgpu: WALKER_ERROR: 0x0
[ 1788.822623] amdgpu 0000:c1:00.0: amdgpu: PERMISSION_FAULTS: 0x0
[ 1788.822626] amdgpu 0000:c1:00.0: amdgpu: MAPPING_ERROR: 0x0
[ 1788.822629] amdgpu 0000:c1:00.0: amdgpu: RW: 0x0
[ 1799.255307] [drm:amdgpu_job_timedout [amdgpu]] *ERROR* ring gfx_0.0.0 timeout, signaled seq=396987, emitted seq=396989
[ 1799.255551] [drm:amdgpu_job_timedout [amdgpu]] *ERROR* Process information: process qemu-system-x86 pid 3344 thread qemu-syste:cs0 pid 3369
[ 1799.255832] amdgpu 0000:c1:00.0: amdgpu: GPU reset begin!
[ 1799.562697] [drm:mes_v11_0_submit_pkt_and_poll_completion.constprop.0 [amdgpu]] *ERROR* MES failed to response msg=3
[ 1799.563172] [drm:amdgpu_mes_unmap_legacy_queue [amdgpu]] *ERROR* failed to unmap legacy queue
[ 1799.719984] [drm:mes_v11_0_submit_pkt_and_poll_completion.constprop.0 [amdgpu]] *ERROR* MES failed to response msg=3
[ 1799.720449] [drm:amdgpu_mes_unmap_legacy_queue [amdgpu]] *ERROR* failed to unmap legacy queue
[ 1799.876983] [drm:mes_v11_0_submit_pkt_and_poll_completion.constprop.0 [amdgpu]] *ERROR* MES failed to response msg=3
[ 1799.877422] [drm:amdgpu_mes_unmap_legacy_queue [amdgpu]] *ERROR* failed to unmap legacy queue
[ 1800.033315] [drm:mes_v11_0_submit_pkt_and_poll_completion.constprop.0 [amdgpu]] *ERROR* MES failed to response msg=3
[ 1800.033760] [drm:amdgpu_mes_unmap_legacy_queue [amdgpu]] *ERROR* failed to unmap legacy queue
[ 1800.189975] [drm:mes_v11_0_submit_pkt_and_poll_completion.constprop.0 [amdgpu]] *ERROR* MES failed to response msg=3
[ 1800.190420] [drm:amdgpu_mes_unmap_legacy_queue [amdgpu]] *ERROR* failed to unmap legacy queue
[ 1800.346518] [drm:mes_v11_0_submit_pkt_and_poll_completion.constprop.0 [amdgpu]] *ERROR* MES failed to response msg=3
[ 1800.346954] [drm:amdgpu_mes_unmap_legacy_queue [amdgpu]] *ERROR* failed to unmap legacy queue
[ 1800.503116] [drm:mes_v11_0_submit_pkt_and_poll_completion.constprop.0 [amdgpu]] *ERROR* MES failed to response msg=3
[ 1800.503559] [drm:amdgpu_mes_unmap_legacy_queue [amdgpu]] *ERROR* failed to unmap legacy queue
[ 1800.657708] [drm:mes_v11_0_submit_pkt_and_poll_completion.constprop.0 [amdgpu]] *ERROR* MES failed to response msg=3
[ 1800.658401] [drm:amdgpu_mes_unmap_legacy_queue [amdgpu]] *ERROR* failed to unmap legacy queue
[ 1800.805842] [drm:mes_v11_0_submit_pkt_and_poll_completion.constprop.0 [amdgpu]] *ERROR* MES failed to response msg=3
[ 1800.806540] [drm:amdgpu_mes_unmap_legacy_queue [amdgpu]] *ERROR* failed to unmap legacy queue
[ 1801.073811] [drm:gfx_v11_0_hw_fini [amdgpu]] *ERROR* failed to halt cp gfx
[ 1801.075635] amdgpu 0000:c1:00.0: amdgpu: MODE2 reset
[ 1801.108338] amdgpu 0000:c1:00.0: amdgpu: GPU reset succeeded, trying to resume
[ 1801.108964] [drm] PCIE GART of 512M enabled (table at 0x00000080FFD00000).
[ 1801.109188] amdgpu 0000:c1:00.0: amdgpu: SMU is resuming...
[ 1801.111200] amdgpu 0000:c1:00.0: amdgpu: SMU is resumed successfully!
[ 1801.113332] [drm] DMUB hardware initialized: version=0x08003700
[ 1806.235965] thunderbolt 0000:c3:00.6: 0:4 <-> 2:16 (USB3): failed to calculate available bandwidth
[ 1811.534132] [drm:amdgpu_dm_process_dmub_aux_transfer_sync [amdgpu]] *ERROR* wait_for_completion_timeout timeout!
[ 1821.773281] [drm:amdgpu_dm_process_dmub_aux_transfer_sync [amdgpu]] *ERROR* wait_for_completion_timeout timeout!
[ 1832.013311] [drm:amdgpu_dm_process_dmub_aux_transfer_sync [amdgpu]] *ERROR* wait_for_completion_timeout timeout!
[ 1842.253284] [drm:amdgpu_dm_process_dmub_aux_transfer_sync [amdgpu]] *ERROR* wait_for_completion_timeout timeout!
[ 1852.494275] [drm:amdgpu_dm_process_dmub_aux_transfer_sync [amdgpu]] *ERROR* wait_for_completion_timeout timeout!
[ 1855.512089] usb 7-1: USB disconnect, device number 2
[ 1855.512096] usb 7-1.1: USB disconnect, device number 4
[ 1855.512100] usb 7-1.1.1: USB disconnect, device number 6
[ 1855.512102] usb 7-1.1.1.3: USB disconnect, device number 8
[ 1855.513557] pcieport 0000:00:04.1: pciehp: Slot(0-1): Link Down
[ 1855.513563] pcieport 0000:00:04.1: pciehp: Slot(0-1): Card not present
[ 1855.513628] pcieport 0000:00:04.1: PME: Spurious native interrupt!
[ 1855.513642] pcieport 0000:00:04.1: PME: Spurious native interrupt!
[ 1855.513847] igc 0000:c0:00.0 enp192s0: PHC removed
[ 1855.513979] igc 0000:c0:00.0 enp192s0: PCIe link lost, device now detached
[ 1855.517195] thunderbolt 1-2: device disconnected
[ 1855.585544] pcieport 0000:63:03.0: Unable to change power state from D3hot to D0, device inaccessible
[ 1855.587006] pcieport 0000:63:03.0: Runtime PM usage count underflow!
[ 1855.587039] pcieport 0000:63:02.0: Unable to change power state from D3hot to D0, device inaccessible
[ 1855.587569] pcieport 0000:63:02.0: Runtime PM usage count underflow!
[ 1855.587589] pcieport 0000:63:01.0: Unable to change power state from D3hot to D0, device inaccessible
[ 1855.588078] pcieport 0000:63:01.0: Runtime PM usage count underflow!
[ 1855.588095] pcieport 0000:63:00.0: Unable to change power state from D3hot to D0, device inaccessible
[ 1855.588383] pci_bus 0000:64: busn_res: [bus 64] is released
[ 1855.589672] pci_bus 0000:65: busn_res: [bus 65-83] is released
[ 1855.590222] pci_bus 0000:84: busn_res: [bus 84-a2] is released
[ 1855.590704] pci_bus 0000:a3: busn_res: [bus a3-bf] is released
[ 1855.591129] pci_bus 0000:c0: busn_res: [bus c0] is released
[ 1855.591350] pci_bus 0000:63: busn_res: [bus 63-c0] is released
[ 1855.773422] usb 8-1: USB disconnect, device number 2
[ 1855.773433] usb 8-1.4: USB disconnect, device number 3
[ 1855.773437] usb 8-1.4.1: USB disconnect, device number 4
[ 1855.781009] usb 8-1.4.2: USB disconnect, device number 5
[ 1855.876724] usb 7-1.1.2: USB disconnect, device number 7
[ 1855.876732] usb 7-1.1.2.2: USB disconnect, device number 9
[ 1856.085155] usb 7-1.1.2.5: USB disconnect, device number 10
[ 1856.181073] usb 7-1.1.5: USB disconnect, device number 5
[ 1856.244964] usb 7-1.3: USB disconnect, device number 3
[ 1862.733333] [drm:amdgpu_dm_process_dmub_aux_transfer_sync [amdgpu]] *ERROR* wait_for_completion_timeout timeout!
[ 1872.973294] [drm:amdgpu_dm_process_dmub_aux_transfer_sync [amdgpu]] *ERROR* wait_for_completion_timeout timeout!
[ 1873.613289] pcieport 0000:00:08.3: PME: Spurious native interrupt!
[ 1883.213307] [drm:amdgpu_dm_process_dmub_aux_transfer_sync [amdgpu]] *ERROR* wait_for_completion_timeout timeout!
[ 1893.453312] [drm:amdgpu_dm_process_dmub_aux_transfer_sync [amdgpu]] *ERROR* wait_for_completion_timeout timeout!
[ 1903.693571] [drm:amdgpu_dm_process_dmub_aux_transfer_sync [amdgpu]] *ERROR* wait_for_completion_timeout timeout!
[ 1913.933455] [drm:amdgpu_dm_process_dmub_aux_transfer_sync [amdgpu]] *ERROR* wait_for_completion_timeout timeout!
[ 1924.173296] [drm:amdgpu_dm_process_dmub_aux_transfer_sync [amdgpu]] *ERROR* wait_for_completion_timeout timeout!
[ 1934.413285] [drm:amdgpu_dm_process_dmub_aux_transfer_sync [amdgpu]] *ERROR* wait_for_completion_timeout timeout!
[ 1944.653303] [drm:amdgpu_dm_process_dmub_aux_transfer_sync [amdgpu]] *ERROR* wait_for_completion_timeout timeout!
[ 1954.893484] [drm:amdgpu_dm_process_dmub_aux_transfer_sync [amdgpu]] *ERROR* wait_for_completion_timeout timeout!