I captured the dmesg from the last boot after enabling verbose and interactive (didn't use that, just enabled for later)
The new entries I noticed during boot start at this line:
[ 6.472829] RIP: 0033:0x7fb2edf0c73e
There is more to the log, I just hit the 40k characters limit.
[ 5.578234] [TTM] Initializing DMA pool allocator
[ 5.578268] [drm] amdgpu: 8176M of VRAM memory ready
[ 5.578270] [drm] amdgpu: 8176M of GTT memory ready.
[ 5.578272] [drm] GART: num cpu pages 131072, num gpu pages 131072
[ 5.578496] [drm] PCIE GART of 512M enabled (table at 0x000000F400900000).
[ 5.583371] [drm] use_doorbell being set to: [true]
[ 5.583960] [drm] use_doorbell being set to: [true]
[ 5.584051] amdgpu: [powerplay] hwmgr_sw_init smu backed is vega10_smu
[ 5.586084] [drm] Found UVD firmware Version: 66.43 Family ID: 17
[ 5.586090] [drm] PSP loading UVD firmware
[ 5.587716] [drm] Found VCE firmware Version: 57.6 Binary ID: 4
[ 5.587752] [drm] PSP loading VCE firmware
[ 5.755009] kvm: Nested Virtualization enabled
[ 5.755020] SVM: kvm: Nested Paging enabled
[ 5.755021] SVM: Virtual VMLOAD VMSAVE supported
[ 5.755021] SVM: Virtual GIF supported
[ 5.758272] MCE: In-kernel MCE decoding enabled.
[ 5.759775] ppdev: user-space parallel port driver
[ 5.761006] EDAC amd64: F17h_M10h detected (node 0).
[ 5.761081] EDAC amd64: Node 0: DRAM ECC disabled.
[ 5.776960] [drm] reserve 0x400000 from 0xf5fe800000 for PSP TMR
[ 5.826283] r8169 0000:1b:00.0 enp27s0: renamed from eth0
[ 5.827091] EDAC amd64: F17h_M10h detected (node 0).
[ 5.827174] EDAC amd64: Node 0: DRAM ECC disabled.
[ 5.903719] EDAC amd64: F17h_M10h detected (node 0).
[ 5.903849] EDAC amd64: Node 0: DRAM ECC disabled.
[ 5.935166] [drm] kiq ring mec 2 pipe 1 q 0
[ 5.946902] [drm] Display Core initialized with v3.2.76!
[ 5.960109] Adding 8388604k swap on /dev/mapper/lonestar_LVM-LVM_SWAP. Priority:-2 extents:1 across:8388604k SSFS
[ 5.966978] snd_hda_intel 0000:12:00.1: bound 0000:12:00.0 (ops amdgpu_dm_audio_component_bind_ops [amdgpu])
[ 6.001929] [drm] Supports vblank timestamp caching Rev 2 (21.10.2013).
[ 6.003974] EDAC amd64: F17h_M10h detected (node 0).
[ 6.004062] EDAC amd64: Node 0: DRAM ECC disabled.
[ 6.023302] [drm] UVD and UVD ENC initialized successfully.
[ 6.054120] EDAC amd64: F17h_M10h detected (node 0).
[ 6.054216] EDAC amd64: Node 0: DRAM ECC disabled.
[ 6.058447] EXT4-fs (dm-8): mounted filesystem with ordered data mode. Opts: discard
[ 6.061651] EXT4-fs (dm-6): mounted filesystem with ordered data mode. Opts: discard
[ 6.063798] EXT4-fs (dm-7): mounted filesystem with ordered data mode. Opts: discard
[ 6.065580] EXT4-fs (dm-2): mounted filesystem with ordered data mode. Opts: discard
[ 6.117187] EDAC amd64: F17h_M10h detected (node 0).
[ 6.117267] EDAC amd64: Node 0: DRAM ECC disabled.
[ 6.123987] [drm] VCE initialized successfully.
[ 6.125205] kfd kfd: Allocated 3969056 bytes on gart
[ 6.125802] Virtual CRAT table created for GPU
[ 6.125803] Parsing CRAT table with 1 nodes
[ 6.125812] Creating topology SYSFS entries
[ 6.125961] Topology: Add dGPU node [0x687f:0x1002]
[ 6.125964] kfd kfd: added device 1002:687f
[ 6.127280] [drm] fb mappable at 0xE0CEE000
[ 6.127281] [drm] vram apper at 0xE0000000
[ 6.127281] [drm] size 11059200
[ 6.127282] [drm] fb depth is 24
[ 6.127282] [drm] pitch is 10240
[ 6.127365] fbcon: amdgpudrmfb (fb0) is primary device
[ 6.151737] Console: switching to colour frame buffer device 320x67
[ 6.172410] amdgpu 0000:12:00.0: fb0: amdgpudrmfb frame buffer device
[ 6.196647] EDAC amd64: F17h_M10h detected (node 0).
[ 6.196757] EDAC amd64: Node 0: DRAM ECC disabled.
[ 6.213439] amdgpu 0000:12:00.0: ring gfx uses VM inv eng 0 on hub 0
[ 6.213441] amdgpu 0000:12:00.0: ring comp_1.0.0 uses VM inv eng 1 on hub 0
[ 6.213443] amdgpu 0000:12:00.0: ring comp_1.1.0 uses VM inv eng 4 on hub 0
[ 6.213444] amdgpu 0000:12:00.0: ring comp_1.2.0 uses VM inv eng 5 on hub 0
[ 6.213445] amdgpu 0000:12:00.0: ring comp_1.3.0 uses VM inv eng 6 on hub 0
[ 6.213447] amdgpu 0000:12:00.0: ring comp_1.0.1 uses VM inv eng 7 on hub 0
[ 6.213448] amdgpu 0000:12:00.0: ring comp_1.1.1 uses VM inv eng 8 on hub 0
[ 6.213449] amdgpu 0000:12:00.0: ring comp_1.2.1 uses VM inv eng 9 on hub 0
[ 6.213450] amdgpu 0000:12:00.0: ring comp_1.3.1 uses VM inv eng 10 on hub 0
[ 6.213451] amdgpu 0000:12:00.0: ring kiq_2.1.0 uses VM inv eng 11 on hub 0
[ 6.213452] amdgpu 0000:12:00.0: ring sdma0 uses VM inv eng 0 on hub 1
[ 6.213453] amdgpu 0000:12:00.0: ring page0 uses VM inv eng 1 on hub 1
[ 6.213454] amdgpu 0000:12:00.0: ring sdma1 uses VM inv eng 4 on hub 1
[ 6.213455] amdgpu 0000:12:00.0: ring page1 uses VM inv eng 5 on hub 1
[ 6.213456] amdgpu 0000:12:00.0: ring uvd_0 uses VM inv eng 6 on hub 1
[ 6.213457] amdgpu 0000:12:00.0: ring uvd_enc_0.0 uses VM inv eng 7 on hub 1
[ 6.213458] amdgpu 0000:12:00.0: ring uvd_enc_0.1 uses VM inv eng 8 on hub 1
[ 6.213460] amdgpu 0000:12:00.0: ring vce0 uses VM inv eng 9 on hub 1
[ 6.213461] amdgpu 0000:12:00.0: ring vce1 uses VM inv eng 10 on hub 1
[ 6.213462] amdgpu 0000:12:00.0: ring vce2 uses VM inv eng 11 on hub 1
[ 6.213463] [drm] ECC is not present.
[ 6.213466] [drm] SRAM ECC is not present.
[ 6.214782] [drm] Initialized amdgpu 3.37.0 20150101 for 0000:12:00.0 on minor 0
[ 6.214964] amdgpu 0000:38:00.0: enabling device (0000 -> 0003)
[ 6.215067] [drm] initializing kernel modesetting (RAVEN 0x1002:0x15DD 0x1462:0x7A38 0xC6).
[ 6.215087] [drm] register mmio base: 0xFE400000
[ 6.215088] [drm] register mmio size: 524288
[ 6.215107] [drm] add ip block number 0 <soc15_common>
[ 6.215108] [drm] add ip block number 1 <gmc_v9_0>
[ 6.215109] [drm] add ip block number 2 <vega10_ih>
[ 6.215110] [drm] add ip block number 3 <psp>
[ 6.215111] [drm] add ip block number 4 <gfx_v9_0>
[ 6.215112] [drm] add ip block number 5 <sdma_v4_0>
[ 6.215113] [drm] add ip block number 6 <powerplay>
[ 6.215114] [drm] add ip block number 7 <dm>
[ 6.215115] [drm] add ip block number 8 <vcn_v1_0>
[ 6.226499] [drm] BIOS signature incorrect ff ff
[ 6.226505] amdgpu 0000:38:00.0: BAR 6: can't assign [??? 0x00000000 flags 0x20000000] (bogus alignment)
[ 6.231037] [drm] BIOS signature incorrect ff ff
[ 6.232475] ATOM BIOS: 113-RAVEN-107
[ 6.233137] [drm] VCN decode is enabled in VM mode
[ 6.233137] [drm] VCN encode is enabled in VM mode
[ 6.233138] [drm] JPEG decode is enabled in VM mode
[ 6.233156] [drm] GPU posting now...
[ 6.233416] [drm] vm size is 262144 GB, 4 levels, block size is 9-bit, fragment size is 9-bit
[ 6.233422] amdgpu 0000:38:00.0: VRAM: 2048M 0x000000F400000000 - 0x000000F47FFFFFFF (2048M used)
[ 6.233424] amdgpu 0000:38:00.0: GART: 1024M 0x0000000000000000 - 0x000000003FFFFFFF
[ 6.233426] amdgpu 0000:38:00.0: AGP: 267419648M 0x000000F800000000 - 0x0000FFFFFFFFFFFF
[ 6.233430] [drm] Detected VRAM RAM=2048M, BAR=2048M
[ 6.233430] [drm] RAM width 128bits DDR4
[ 6.233452] [drm] amdgpu: 2048M of VRAM memory ready
[ 6.233454] [drm] amdgpu: 3072M of GTT memory ready.
[ 6.233456] [drm] GART: num cpu pages 262144, num gpu pages 262144
[ 6.233581] [drm] PCIE GART of 1024M enabled (table at 0x000000F400900000).
[ 6.241062] [drm] use_doorbell being set to: [true]
[ 6.241121] amdgpu: [powerplay] hwmgr_sw_init smu backed is smu10_smu
[ 6.242314] [drm] Found VCN firmware Version ENC: 1.9 DEC: 1 VEP: 0 Revision: 28
[ 6.242321] [drm] PSP loading VCN firmware
[ 6.260186] EDAC amd64: F17h_M10h detected (node 0).
[ 6.260262] EDAC amd64: Node 0: DRAM ECC disabled.
[ 6.263393] [drm] reserve 0x400000 from 0xf47f800000 for PSP TMR
[ 6.303406] elogind-daemon[1604]: Watching system buttons on /dev/input/event1 (Power Button)
[ 6.360247] elogind-daemon[1604]: Watching system buttons on /dev/input/event0 (Power Button)
[ 6.440029] amdgpu 0000:38:00.0: RAS: optional ras ta ucode is not available
[ 6.461645] [drm] kiq ring mec 2 pipe 1 q 0
[ 6.461994] [drm] DM_PPLIB: values for F clock
[ 6.461995] [drm] DM_PPLIB: 1600000 in kHz, 4399 in mV
[ 6.461996] [drm] DM_PPLIB: values for DCF clock
[ 6.461997] [drm] DM_PPLIB: 300000 in kHz, 3649 in mV
[ 6.461997] [drm] DM_PPLIB: 600000 in kHz, 4074 in mV
[ 6.461997] [drm] DM_PPLIB: 626000 in kHz, 4250 in mV
[ 6.461998] [drm] DM_PPLIB: 654000 in kHz, 4399 in mV
[ 6.462156] [drm] Unsupported Connector type:21!
[ 6.462161] [drm] Unsupported Connector type:21!
[ 6.462165] [drm] Unsupported Connector type:21!
[ 6.462170] [drm] Unsupported Connector type:21!
[ 6.462171] [drm] Display Core initialized with v3.2.76!
[ 6.462529] BUG: kernel NULL pointer dereference, address: 0000000000000f28
[ 6.462557] #PF: supervisor write access in kernel mode
[ 6.462574] #PF: error_code(0x0002) - not-present page
[ 6.462589] PGD 0 P4D 0
[ 6.462600] Oops: 0002 [#1] PREEMPT SMP NOPTI
[ 6.462615] CPU: 2 PID: 958 Comm: udevd Not tainted 5.7.6-artix1-1 #1
[ 6.462634] Hardware name: Micro-Star International Co., Ltd. MS-7A38/B350M BAZOOKA (MS-7A38), BIOS 1.J0 01/21/2019
[ 6.462760] RIP: 0010:hdcp_create_workqueue+0x67/0x2f0 [amdgpu]
[ 6.462778] Code: 48 89 c7 e8 ab e6 d7 e2 49 89 c4 48 85 c0 0f 84 8d 02 00 00 48 8b 3d 10 4f cf e3 ba 00 14 00 00 be c0 0d 00 00 e8 79 ed d7 e2 <49> 89 84 24 18 0f 00 00 48 85 c0 0f 84 44 02 00 00 48 8b 3d e9 4e
[ 6.462830] RSP: 0018:ffffa3f801d87860 EFLAGS: 00010286
[ 6.462847] RAX: ffff953cdcafe000 RBX: ffff953cdca60000 RCX: 0000000000000000
[ 6.462868] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff953cdcb00000
[ 6.462889] RBP: 0000000000000000 R08: ffff953cdcafe000 R09: ffff953cdcafe000
[ 6.462910] R10: 00d0afdc3c95ffff R11: 0000000000000006 R12: 0000000000000010
[ 6.462931] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000007
[ 6.462952] FS: 00007fb2edac1bc0(0000) GS:ffff953cf0e80000(0000) knlGS:0000000000000000
[ 6.462976] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 6.462993] CR2: 0000000000000f28 CR3: 000000042d3de000 CR4: 00000000003406e0
[ 6.463014] Call Trace:
[ 6.463115] amdgpu_dm_init.isra.0.cold+0xa0/0x1057 [amdgpu]
[ 6.463311] dm_hw_init+0xe/0x20 [amdgpu]
[ 6.463507] amdgpu_device_init.cold+0x1531/0x195b [amdgpu]
[ 6.463675] amdgpu_driver_load_kms+0x5c/0x200 [amdgpu]
[ 6.463838] amdgpu_pci_probe+0xf4/0x180 [amdgpu]
[ 6.463871] local_pci_probe+0x42/0x80
[ 6.466104] ? pci_match_device+0xd7/0x100
[ 6.468323] pci_device_probe+0xfa/0x1b0
[ 6.470549] really_probe+0x167/0x410
[ 6.472777] driver_probe_device+0xb6/0x100
[ 6.472780] device_driver_attach+0xa1/0xb0
[ 6.472783] __driver_attach+0x8a/0x150
[ 6.472786] ? device_driver_attach+0xb0/0xb0
[ 6.472788] ? device_driver_attach+0xb0/0xb0
[ 6.472791] bus_for_each_dev+0x89/0xd0
[ 6.472794] bus_add_driver+0x12b/0x1e0
[ 6.472797] driver_register+0x8b/0xe0
[ 6.472799] ? 0xffffffffc0f05000
[ 6.472803] do_one_initcall+0x59/0x240
[ 6.472808] do_init_module+0x5c/0x260
[ 6.472811] load_module+0x2137/0x23a0
[ 6.472818] __do_sys_init_module+0x172/0x1a0
[ 6.472824] do_syscall_64+0x49/0x90
[ 6.472827] entry_SYSCALL_64_after_hwframe+0x44/0xa9
[ 6.472829] RIP: 0033:0x7fb2edf0c73e
[ 6.472832] Code: 48 8b 0d 55 f7 0b 00 f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 90 f3 0f 1e fa 49 89 ca b8 af 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d 22 f7 0b 00 f7 d8 64 89 01 48
[ 6.472834] RSP: 002b:00007ffeb453d608 EFLAGS: 00000246 ORIG_RAX: 00000000000000af
[ 6.472836] RAX: ffffffffffffffda RBX: 000055c6b5cb20e0 RCX: 00007fb2edf0c73e
[ 6.472836] RDX: 00007fb2edfe697d RSI: 00000000009e8461 RDI: 00007fb2ebe3b010
[ 6.472837] RBP: 00007fb2ebe3b010 R08: 000055c6b5cc2b10 R09: 00000000009e8470
[ 6.472838] R10: 0000000000000007 R11: 0000000000000246 R12: 00007fb2edfe697d
[ 6.472839] R13: 00007ffeb453d780 R14: 000055c6b5cb5110 R15: 000055c6b5cb20e0
[ 6.472842] Modules linked in: nls_iso8859_1 nls_cp437 vfat fat ppdev edac_mce_amd kvm_amd wmi_bmof kvm irqbypass crct10dif_pclmul crc32_pclmul ghash_clmulni_intel aesni_intel crypto_simd cryptd amdgpu(+) glue_helper pcspkr r8169 ccp k10temp sp5100_tco realtek i2c_piix4 rng_core libphy snd_hda_codec_realtek gpu_sched input_leds snd_hda_codec_generic i2c_algo_bit ledtrig_audio ttm snd_hda_codec_hdmi joydev drm_kms_helper snd_hda_intel snd_intel_dspcfg cec snd_hda_codec rc_core drm snd_hda_core snd_hwdep snd_pcm snd_timer agpgart snd syscopyarea sysfillrect sysimgblt mousedev fb_sys_fops soundcore sg parport_pc evdev crypto_user parport mac_hid pinctrl_amd gpio_amdpt wmi acpi_cpufreq ext4 crc32c_generic crc16 mbcache jbd2 hid_generic usbhid hid uas usb_storage dm_mod xhci_pci crc32c_intel xhci_hcd
[ 6.472878] CR2: 0000000000000f28
[ 6.472880] ---[ end trace 026b364343728c26 ]---
[ 6.473058] RIP: 0010:hdcp_create_workqueue+0x67/0x2f0 [amdgpu]
[ 6.473062] Code: 48 89 c7 e8 ab e6 d7 e2 49 89 c4 48 85 c0 0f 84 8d 02 00 00 48 8b 3d 10 4f cf e3 ba 00 14 00 00 be c0 0d 00 00 e8 79 ed d7 e2 <49> 89 84 24 18 0f 00 00 48 85 c0 0f 84 44 02 00 00 48 8b 3d e9 4e
[ 6.547346] RSP: 0018:ffffa3f801d87860 EFLAGS: 00010286
[ 6.547348] RAX: ffff953cdcafe000 RBX: ffff953cdca60000 RCX: 0000000000000000
[ 6.547350] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff953cdcb00000
[ 6.547351] RBP: 0000000000000000 R08: ffff953cdcafe000 R09: ffff953cdcafe000
[ 6.547352] R10: 00d0afdc3c95ffff R11: 0000000000000006 R12: 0000000000000010
[ 6.547353] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000007
[ 6.547355] FS: 00007fb2edac1bc0(0000) GS:ffff953cf0e80000(0000) knlGS:0000000000000000
[ 6.547356] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 6.547358] CR2: 0000000000000f28 CR3: 000000042d3de000 CR4: 00000000003406e0
[ 6.549594] udevd[916]: worker [958] terminated by signal 9 (Killed)
[ 6.566940] udevd[916]: worker [958] failed while handling '/devices/pci0000:00/0000:00:01.1/0000:10:00.0/0000:11:00.0/0000:12:00.0'
[ 6.830413] elogind-daemon[1604]: Watching system buttons on /dev/input/event10 (Logitech G9 Laser Mouse Consumer Control)
[ 6.833544] elogind-daemon[1604]: Watching system buttons on /dev/input/event9 (Logitech G9 Laser Mouse Keyboard)
[ 6.836583] elogind-daemon[1604]: Watching system buttons on /dev/input/event3 (ErgoDox EZ ErgoDox EZ)
[ 6.839615] elogind-daemon[1604]: Watching system buttons on /dev/input/event5 (ErgoDox EZ ErgoDox EZ System Control)
[ 6.841878] elogind-daemon[1604]: Watching system buttons on /dev/input/event6 (ErgoDox EZ ErgoDox EZ Consumer Control)
[ 6.844073] elogind-daemon[1604]: Watching system buttons on /dev/input/event7 (ErgoDox EZ ErgoDox EZ)
[ 7.216835] elogind-daemon[1604]: New seat seat0.
[ 7.783405] Generic FE-GE Realtek PHY r8169-1b00:00: attached PHY driver [Generic FE-GE Realtek PHY] (mii_bus:phy_addr=r8169-1b00:00, irq=IGNORE)
[ 7.864535] r8169 0000:1b:00.0 enp27s0: Link is Down
[ 8.954771] random: crng init done
[ 8.955874] random: 7 urandom warning(s) missed due to ratelimiting
[ 10.611720] amdgpu 0000:12:00.0: vgaarb: changed VGA decodes: olddecodes=io+mem,decodes=none:owns=io+mem
[ 10.611726] amdgpu 0000:38:00.0: vgaarb: changed VGA decodes: olddecodes=io+mem,decodes=none:owns=none
[ 10.855468] r8169 0000:1b:00.0 enp27s0: Link is Up - 1Gbps/Full - flow control rx/tx
[ 10.855481] IPv6: ADDRCONF(NETDEV_CHANGE): enp27s0: link becomes ready
[ 11.769132] elogind-daemon[1604]: New session c1 of user sddm.
[ 16.448979] elogind-daemon[1604]: New session 1 of user lonestar.
[ 16.482613] elogind-daemon[1604]: Removed session c1.
[ 16.946161] fuse: init (API version 7.31)
[ 20.505727] EXT4-fs (sdc1): mounted filesystem with ordered data mode. Opts: (null)
I'll only add that I rebooted about 4 times, and about half of them got me to sddm and a graphical interface.