Screen artifacts with amdgpu

[stoaphil]

Describe the bug
When using amdgpu, white-on-black horizontal lines intermittently flash on right half of screen. See video attached below in Screenshots

FreeBSD version
FreeBSD fbsd 14.0-CURRENT FreeBSD 14.0-CURRENT #0 main-n258691-24cf7a8d628: Thu Oct 20 07:55:17 UTC 2022 root@releng1.nyi.freebsd.org:/usr/obj/usr/src/amd64.amd64/sys/GENERIC amd64

PCI Info
hostb0@pci0:0:0:0: class=0x060000 rev=0x00 hdr=0x00 vendor=0x1022 device=0x1630 subvendor=0x1043 subdevice=0x8809
vendor = 'Advanced Micro Devices, Inc. [AMD]'
device = 'Renoir/Cezanne Root Complex'
class = bridge
subclass = HOST-PCI
none0@pci0:0:0:2: class=0x080600 rev=0x00 hdr=0x00 vendor=0x1022 device=0x1631 subvendor=0x1043 subdevice=0x8809
vendor = 'Advanced Micro Devices, Inc. [AMD]'
device = 'Renoir/Cezanne IOMMU'
class = base peripheral
subclass = IOMMU
hostb1@pci0:0:1:0: class=0x060000 rev=0x00 hdr=0x00 vendor=0x1022 device=0x1632 subvendor=0x0000 subdevice=0x0000
vendor = 'Advanced Micro Devices, Inc. [AMD]'
device = 'Renoir PCIe Dummy Host Bridge'
class = bridge
subclass = HOST-PCI
pcib1@pci0:0:1:2: class=0x060400 rev=0x00 hdr=0x01 vendor=0x1022 device=0x1634 subvendor=0x1043 subdevice=0x8809
vendor = 'Advanced Micro Devices, Inc. [AMD]'
device = 'Renoir/Cezanne PCIe GPP Bridge'
class = bridge
subclass = PCI-PCI
hostb2@pci0:0:2:0: class=0x060000 rev=0x00 hdr=0x00 vendor=0x1022 device=0x1632 subvendor=0x0000 subdevice=0x0000
vendor = 'Advanced Micro Devices, Inc. [AMD]'
device = 'Renoir PCIe Dummy Host Bridge'
class = bridge
subclass = HOST-PCI
pcib8@pci0:0:2:1: class=0x060400 rev=0x00 hdr=0x01 vendor=0x1022 device=0x1634 subvendor=0x1043 subdevice=0x8809
vendor = 'Advanced Micro Devices, Inc. [AMD]'
device = 'Renoir/Cezanne PCIe GPP Bridge'
class = bridge
subclass = PCI-PCI
hostb3@pci0:0:8:0: class=0x060000 rev=0x00 hdr=0x00 vendor=0x1022 device=0x1632 subvendor=0x0000 subdevice=0x0000
vendor = 'Advanced Micro Devices, Inc. [AMD]'
device = 'Renoir PCIe Dummy Host Bridge'
class = bridge
subclass = HOST-PCI
pcib9@pci0:0:8:1: class=0x060400 rev=0x00 hdr=0x01 vendor=0x1022 device=0x1635 subvendor=0x1043 subdevice=0x8809
vendor = 'Advanced Micro Devices, Inc. [AMD]'
device = 'Renoir Internal PCIe GPP Bridge to Bus'
class = bridge
subclass = PCI-PCI
pcib10@pci0:0:8:2: class=0x060400 rev=0x00 hdr=0x01 vendor=0x1022 device=0x1635 subvendor=0x1043 subdevice=0x8809
vendor = 'Advanced Micro Devices, Inc. [AMD]'
device = 'Renoir Internal PCIe GPP Bridge to Bus'
class = bridge
subclass = PCI-PCI
none1@pci0:0:20:0: class=0x0c0500 rev=0x51 hdr=0x00 vendor=0x1022 device=0x790b subvendor=0x1043 subdevice=0x87e1
vendor = 'Advanced Micro Devices, Inc. [AMD]'
device = 'FCH SMBus Controller'
class = serial bus
subclass = SMBus
isab0@pci0:0:20:3: class=0x060100 rev=0x51 hdr=0x00 vendor=0x1022 device=0x790e subvendor=0x1043 subdevice=0x87e1
vendor = 'Advanced Micro Devices, Inc. [AMD]'
device = 'FCH LPC Bridge'
class = bridge
subclass = PCI-ISA
hostb4@pci0:0:24:0: class=0x060000 rev=0x00 hdr=0x00 vendor=0x1022 device=0x166a subvendor=0x0000 subdevice=0x0000
vendor = 'Advanced Micro Devices, Inc. [AMD]'
device = 'Cezanne Data Fabric; Function 0'
class = bridge
subclass = HOST-PCI
hostb5@pci0:0:24:1: class=0x060000 rev=0x00 hdr=0x00 vendor=0x1022 device=0x166b subvendor=0x0000 subdevice=0x0000
vendor = 'Advanced Micro Devices, Inc. [AMD]'
device = 'Cezanne Data Fabric; Function 1'
class = bridge
subclass = HOST-PCI
hostb6@pci0:0:24:2: class=0x060000 rev=0x00 hdr=0x00 vendor=0x1022 device=0x166c subvendor=0x0000 subdevice=0x0000
vendor = 'Advanced Micro Devices, Inc. [AMD]'
device = 'Cezanne Data Fabric; Function 2'
class = bridge
subclass = HOST-PCI
hostb7@pci0:0:24:3: class=0x060000 rev=0x00 hdr=0x00 vendor=0x1022 device=0x166d subvendor=0x0000 subdevice=0x0000
vendor = 'Advanced Micro Devices, Inc. [AMD]'
device = 'Cezanne Data Fabric; Function 3'
class = bridge
subclass = HOST-PCI
hostb8@pci0:0:24:4: class=0x060000 rev=0x00 hdr=0x00 vendor=0x1022 device=0x166e subvendor=0x0000 subdevice=0x0000
vendor = 'Advanced Micro Devices, Inc. [AMD]'
device = 'Cezanne Data Fabric; Function 4'
class = bridge
subclass = HOST-PCI
hostb9@pci0:0:24:5: class=0x060000 rev=0x00 hdr=0x00 vendor=0x1022 device=0x166f subvendor=0x0000 subdevice=0x0000
vendor = 'Advanced Micro Devices, Inc. [AMD]'
device = 'Cezanne Data Fabric; Function 5'
class = bridge
subclass = HOST-PCI
hostb10@pci0:0:24:6: class=0x060000 rev=0x00 hdr=0x00 vendor=0x1022 device=0x1670 subvendor=0x0000 subdevice=0x0000
vendor = 'Advanced Micro Devices, Inc. [AMD]'
device = 'Cezanne Data Fabric; Function 6'
class = bridge
subclass = HOST-PCI
hostb11@pci0:0:24:7: class=0x060000 rev=0x00 hdr=0x00 vendor=0x1022 device=0x1671 subvendor=0x0000 subdevice=0x0000
vendor = 'Advanced Micro Devices, Inc. [AMD]'
device = 'Cezanne Data Fabric; Function 7'
class = bridge
subclass = HOST-PCI
pcib2@pci0:1:0:0: class=0x060400 rev=0x00 hdr=0x01 vendor=0x1022 device=0x57ad subvendor=0x0000 subdevice=0x0000
vendor = 'Advanced Micro Devices, Inc. [AMD]'
device = 'Matisse Switch Upstream'
class = bridge
subclass = PCI-PCI
pcib3@pci0:2:1:0: class=0x060400 rev=0x00 hdr=0x01 vendor=0x1022 device=0x57a3 subvendor=0x1043 subdevice=0x8809
vendor = 'Advanced Micro Devices, Inc. [AMD]'
device = 'Matisse PCIe GPP Bridge'
class = bridge
subclass = PCI-PCI
pcib4@pci0:2:5:0: class=0x060400 rev=0x00 hdr=0x01 vendor=0x1022 device=0x57a3 subvendor=0x1043 subdevice=0x8809
vendor = 'Advanced Micro Devices, Inc. [AMD]'
device = 'Matisse PCIe GPP Bridge'
class = bridge
subclass = PCI-PCI
pcib5@pci0:2:8:0: class=0x060400 rev=0x00 hdr=0x01 vendor=0x1022 device=0x57a4 subvendor=0x1043 subdevice=0x8809
vendor = 'Advanced Micro Devices, Inc. [AMD]'
device = 'Matisse PCIe GPP Bridge'
class = bridge
subclass = PCI-PCI
pcib6@pci0:2:9:0: class=0x060400 rev=0x00 hdr=0x01 vendor=0x1022 device=0x57a4 subvendor=0x1043 subdevice=0x8809
vendor = 'Advanced Micro Devices, Inc. [AMD]'
device = 'Matisse PCIe GPP Bridge'
class = bridge
subclass = PCI-PCI
pcib7@pci0:2:10:0: class=0x060400 rev=0x00 hdr=0x01 vendor=0x1022 device=0x57a4 subvendor=0x1043 subdevice=0x8809
vendor = 'Advanced Micro Devices, Inc. [AMD]'
device = 'Matisse PCIe GPP Bridge'
class = bridge
subclass = PCI-PCI
nvme0@pci0:3:0:0: class=0x010802 rev=0x03 hdr=0x00 vendor=0x2646 device=0x2262 subvendor=0x2646 subdevice=0x2262
vendor = 'Kingston Technology Company, Inc.'
device = 'KC2000 NVMe SSD'
class = mass storage
subclass = NVM
igb0@pci0:4:0:0: class=0x020000 rev=0x03 hdr=0x00 vendor=0x8086 device=0x1539 subvendor=0x1043 subdevice=0x85f0
vendor = 'Intel Corporation'
device = 'I211 Gigabit Network Connection'
class = network
subclass = ethernet
none2@pci0:5:0:0: class=0x130000 rev=0x00 hdr=0x00 vendor=0x1022 device=0x1485 subvendor=0x1043 subdevice=0x8809
vendor = 'Advanced Micro Devices, Inc. [AMD]'
device = 'Starship/Matisse Reserved SPP'
class = non-essential instrumentation
xhci0@pci0:5:0:1: class=0x0c0330 rev=0x00 hdr=0x00 vendor=0x1022 device=0x149c subvendor=0x1043 subdevice=0x8809
vendor = 'Advanced Micro Devices, Inc. [AMD]'
device = 'Matisse USB 3.0 Host Controller'
class = serial bus
subclass = USB
xhci1@pci0:5:0:3: class=0x0c0330 rev=0x00 hdr=0x00 vendor=0x1022 device=0x149c subvendor=0x1022 subdevice=0x148c
vendor = 'Advanced Micro Devices, Inc. [AMD]'
device = 'Matisse USB 3.0 Host Controller'
class = serial bus
subclass = USB
ahci0@pci0:6:0:0: class=0x010601 rev=0x51 hdr=0x00 vendor=0x1022 device=0x7901 subvendor=0x1022 subdevice=0x7901
vendor = 'Advanced Micro Devices, Inc. [AMD]'
device = 'FCH SATA Controller [AHCI mode]'
class = mass storage
subclass = SATA
ahci1@pci0:7:0:0: class=0x010601 rev=0x51 hdr=0x00 vendor=0x1022 device=0x7901 subvendor=0x1022 subdevice=0x7901
vendor = 'Advanced Micro Devices, Inc. [AMD]'
device = 'FCH SATA Controller [AHCI mode]'
class = mass storage
subclass = SATA
nvme1@pci0:8:0:0: class=0x010802 rev=0x01 hdr=0x00 vendor=0xc0a9 device=0x540a subvendor=0xc0a9 subdevice=0x540a
vendor = 'Micron/Crucial Technology'
device = 'P2 NVMe PCIe SSD'
class = mass storage
subclass = NVM
vgapci0@pci0:9:0:0: class=0x030000 rev=0xc8 hdr=0x00 vendor=0x1002 device=0x1638 subvendor=0x1043 subdevice=0x8809
vendor = 'Advanced Micro Devices, Inc. [AMD/ATI]'
device = 'Cezanne'
class = display
subclass = VGA
hdac0@pci0:9:0:1: class=0x040300 rev=0x00 hdr=0x00 vendor=0x1002 device=0x1637 subvendor=0x1043 subdevice=0x8809
vendor = 'Advanced Micro Devices, Inc. [AMD/ATI]'
device = 'Renoir Radeon High Definition Audio Controller'
class = multimedia
subclass = HDA
none3@pci0:9:0:2: class=0x108000 rev=0x00 hdr=0x00 vendor=0x1022 device=0x15df subvendor=0x1043 subdevice=0x8809
vendor = 'Advanced Micro Devices, Inc. [AMD]'
device = 'Family 17h (Models 10h-1fh) Platform Security Processor'
class = encrypt/decrypt
xhci2@pci0:9:0:3: class=0x0c0330 rev=0x00 hdr=0x00 vendor=0x1022 device=0x1639 subvendor=0x1043 subdevice=0x87e1
vendor = 'Advanced Micro Devices, Inc. [AMD]'
device = 'Renoir/Cezanne USB 3.1'
class = serial bus
subclass = USB
xhci3@pci0:9:0:4: class=0x0c0330 rev=0x00 hdr=0x00 vendor=0x1022 device=0x1639 subvendor=0x1043 subdevice=0x87e1
vendor = 'Advanced Micro Devices, Inc. [AMD]'
device = 'Renoir/Cezanne USB 3.1'
class = serial bus
subclass = USB
hdac1@pci0:9:0:6: class=0x040300 rev=0x00 hdr=0x00 vendor=0x1022 device=0x15e3 subvendor=0x1043 subdevice=0x8733
vendor = 'Advanced Micro Devices, Inc. [AMD]'
device = 'Family 17h/19h HD Audio Controller'
class = multimedia
subclass = HDA
ahci2@pci0:10:0:0: class=0x010601 rev=0x81 hdr=0x00 vendor=0x1022 device=0x7901 subvendor=0x1043 subdevice=0x87e1
vendor = 'Advanced Micro Devices, Inc. [AMD]'
device = 'FCH SATA Controller [AHCI mode]'
class = mass storage
subclass = SATA

DRM KMOD version
drm-510-kmod 5.10.113_7
drm-kmod 20220907_1

To Reproduce
Install either 13.1-RELEASE, 13.1-STABLE, or 14.0, install drm-kmod package, enable amdgpu by adding kld_list="amdgpu" to /etc/rc.conf, and log into a console.

Screenshots
https://user-images.githubusercontent.com/11449161/198061203-8056e97d-7a3d-4ccb-945f-fcc6423e88cb.mp4

Additional context
It appears support for vendor=0x1002 device=0x1638 graphics card has been added: https://github.com/freebsd/drm-kmod/blob/5.10-lts/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c#L1102
Same issue presents on any FreeBSD version listed above, whether built from source or installed from snapshot.
Disabling video mode using hw.vga.textmode=1 does not resolve the issue.
The issue carries over into an X session.
Notably, the issue disappears when compiling anything, whether in the console or X.

[grahamperrin]

Cross-reference FreeBSD bug 267730 – graphics/drm-510-kmod: screen artifacts with amdgpu