amdgpu: RX 7600 panic Unregistered use of FPU in kernel with 2+ monitors

[idkreserve]

Describe the bug
GPU crash and system reboot when two or more monitors are connected and at least one monitor is set to a refresh rate above 60 Hz. Both monitors lose signal and enter power saving mode, then the system spontaneously reboots after several seconds. The next time the system boots, the following message appears in the startup logs: Unregistered use of FPU in kernel

The issue affects both Xorg and Sway, so it is likely a kernel-level DRM/amdgpu bug, not a display server bug.

If only one monitor is connected, setting it above 60 Hz works correctly. The crash occurs either at startup (if both monitors are already connected and one is configured above 60 Hz) or immediately when a second monitor is hotplugged.

The same GPU and monitors work correctly on FreeBSD 14.4-RELEASE with drm-61-kmod.

FreeBSD version
FreeBSD pcbsd 15.0-RELEASE FreeBSD 15.0-RELEASE releng/15.0-n280995-7aedc8de6446 GENERIC amd64 1500068 1500068

PCI Info

pciconf -lv

hostb0@pci0:0:0:0: class=0x060000 rev=0x00 hdr=0x00 vendor=0x1022 device=0x1450 subvendor=0x1022 subdevice=0x1450
vendor = 'Advanced Micro Devices, Inc. [AMD]'
device = 'Family 17h (Models 00h-0fh) Root Complex'
class = bridge
subclass = HOST-PCI
none0@pci0:0:0:2: class=0x080600 rev=0x00 hdr=0x00 vendor=0x1022 device=0x1451 subvendor=0x1022 subdevice=0x1451
vendor = 'Advanced Micro Devices, Inc. [AMD]'
device = 'Family 17h (Models 00h-0fh) I/O Memory Management Unit'
class = base peripheral
subclass = IOMMU
hostb1@pci0:0:1:0: class=0x060000 rev=0x00 hdr=0x00 vendor=0x1022 device=0x1452 subvendor=0x0000 subdevice=0x0000
vendor = 'Advanced Micro Devices, Inc. [AMD]'
device = 'Family 17h (Models 00h-1fh) PCIe Dummy Host Bridge'
class = bridge
subclass = HOST-PCI
pcib1@pci0:0:1:1: class=0x060400 rev=0x00 hdr=0x01 vendor=0x1022 device=0x1453 subvendor=0x1022 subdevice=0x1453
vendor = 'Advanced Micro Devices, Inc. [AMD]'
device = 'Family 17h (Models 00h-0fh) PCIe GPP Bridge'
class = bridge
subclass = PCI-PCI
pcib2@pci0:0:1:2: class=0x060400 rev=0x00 hdr=0x01 vendor=0x1022 device=0x1453 subvendor=0x1022 subdevice=0x1453
vendor = 'Advanced Micro Devices, Inc. [AMD]'
device = 'Family 17h (Models 00h-0fh) PCIe GPP Bridge'
class = bridge
subclass = PCI-PCI
hostb2@pci0:0:2:0: class=0x060000 rev=0x00 hdr=0x00 vendor=0x1022 device=0x1452 subvendor=0x0000 subdevice=0x0000
vendor = 'Advanced Micro Devices, Inc. [AMD]'
device = 'Family 17h (Models 00h-1fh) PCIe Dummy Host Bridge'
class = bridge
subclass = HOST-PCI
hostb3@pci0:0:3:0: class=0x060000 rev=0x00 hdr=0x00 vendor=0x1022 device=0x1452 subvendor=0x0000 subdevice=0x0000
vendor = 'Advanced Micro Devices, Inc. [AMD]'
device = 'Family 17h (Models 00h-1fh) PCIe Dummy Host Bridge'
class = bridge
subclass = HOST-PCI
pcib9@pci0:0:3:1: class=0x060400 rev=0x00 hdr=0x01 vendor=0x1022 device=0x1453 subvendor=0x1022 subdevice=0x1453
vendor = 'Advanced Micro Devices, Inc. [AMD]'
device = 'Family 17h (Models 00h-0fh) PCIe GPP Bridge'
class = bridge
subclass = PCI-PCI
hostb4@pci0:0:4:0: class=0x060000 rev=0x00 hdr=0x00 vendor=0x1022 device=0x1452 subvendor=0x0000 subdevice=0x0000
vendor = 'Advanced Micro Devices, Inc. [AMD]'
device = 'Family 17h (Models 00h-1fh) PCIe Dummy Host Bridge'
class = bridge
subclass = HOST-PCI
hostb5@pci0:0:7:0: class=0x060000 rev=0x00 hdr=0x00 vendor=0x1022 device=0x1452 subvendor=0x0000 subdevice=0x0000
vendor = 'Advanced Micro Devices, Inc. [AMD]'
device = 'Family 17h (Models 00h-1fh) PCIe Dummy Host Bridge'
class = bridge
subclass = HOST-PCI
pcib12@pci0:0:7:1: class=0x060400 rev=0x00 hdr=0x01 vendor=0x1022 device=0x1454 subvendor=0x1022 subdevice=0x1454
vendor = 'Advanced Micro Devices, Inc. [AMD]'
device = 'Family 17h (Models 00h-0fh) Internal PCIe GPP Bridge 0 to Bus B'
class = bridge
subclass = PCI-PCI
hostb6@pci0:0:8:0: class=0x060000 rev=0x00 hdr=0x00 vendor=0x1022 device=0x1452 subvendor=0x0000 subdevice=0x0000
vendor = 'Advanced Micro Devices, Inc. [AMD]'
device = 'Family 17h (Models 00h-1fh) PCIe Dummy Host Bridge'
class = bridge
subclass = HOST-PCI
pcib13@pci0:0:8:1: class=0x060400 rev=0x00 hdr=0x01 vendor=0x1022 device=0x1454 subvendor=0x1022 subdevice=0x1454
vendor = 'Advanced Micro Devices, Inc. [AMD]'
device = 'Family 17h (Models 00h-0fh) Internal PCIe GPP Bridge 0 to Bus B'
class = bridge
subclass = PCI-PCI
intsmb0@pci0:0:20:0: class=0x0c0500 rev=0x59 hdr=0x00 vendor=0x1022 device=0x790b subvendor=0x1458 subdevice=0x5001
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=0x1458 subdevice=0x5001
vendor = 'Advanced Micro Devices, Inc. [AMD]'
device = 'FCH LPC Bridge'
class = bridge
subclass = PCI-ISA
hostb7@pci0:0:24:0: class=0x060000 rev=0x00 hdr=0x00 vendor=0x1022 device=0x1460 subvendor=0x0000 subdevice=0x0000
vendor = 'Advanced Micro Devices, Inc. [AMD]'
device = 'Family 17h (Models 00h-0fh) Data Fabric: Device 18h; Function 0'
class = bridge
subclass = HOST-PCI
hostb8@pci0:0:24:1: class=0x060000 rev=0x00 hdr=0x00 vendor=0x1022 device=0x1461 subvendor=0x0000 subdevice=0x0000
vendor = 'Advanced Micro Devices, Inc. [AMD]'
device = 'Family 17h (Models 00h-0fh) Data Fabric: Device 18h; Function 1'
class = bridge
subclass = HOST-PCI
hostb9@pci0:0:24:2: class=0x060000 rev=0x00 hdr=0x00 vendor=0x1022 device=0x1462 subvendor=0x0000 subdevice=0x0000
vendor = 'Advanced Micro Devices, Inc. [AMD]'
device = 'Family 17h (Models 00h-0fh) Data Fabric: Device 18h; Function 2'
class = bridge
subclass = HOST-PCI
hostb10@pci0:0:24:3: class=0x060000 rev=0x00 hdr=0x00 vendor=0x1022 device=0x1463 subvendor=0x0000 subdevice=0x0000
vendor = 'Advanced Micro Devices, Inc. [AMD]'
device = 'Family 17h (Models 00h-0fh) Data Fabric: Device 18h; Function 3'
class = bridge
subclass = HOST-PCI
hostb11@pci0:0:24:4: class=0x060000 rev=0x00 hdr=0x00 vendor=0x1022 device=0x1464 subvendor=0x0000 subdevice=0x0000
vendor = 'Advanced Micro Devices, Inc. [AMD]'
device = 'Family 17h (Models 00h-0fh) Data Fabric: Device 18h; Function 4'
class = bridge
subclass = HOST-PCI
hostb12@pci0:0:24:5: class=0x060000 rev=0x00 hdr=0x00 vendor=0x1022 device=0x1465 subvendor=0x0000 subdevice=0x0000
vendor = 'Advanced Micro Devices, Inc. [AMD]'
device = 'Family 17h (Models 00h-0fh) Data Fabric: Device 18h; Function 5'
class = bridge
subclass = HOST-PCI
hostb13@pci0:0:24:6: class=0x060000 rev=0x00 hdr=0x00 vendor=0x1022 device=0x1466 subvendor=0x0000 subdevice=0x0000
vendor = 'Advanced Micro Devices, Inc. [AMD]'
device = 'Family 17h (Models 00h-0fh) Data Fabric: Device 18h; Function 6'
class = bridge
subclass = HOST-PCI
hostb14@pci0:0:24:7: class=0x060000 rev=0x00 hdr=0x00 vendor=0x1022 device=0x1467 subvendor=0x0000 subdevice=0x0000
vendor = 'Advanced Micro Devices, Inc. [AMD]'
device = 'Family 17h (Models 00h-0fh) Data Fabric: Device 18h; Function 7'
class = bridge
subclass = HOST-PCI
nvme0@pci0:1:0:0: class=0x010802 rev=0x00 hdr=0x00 vendor=0x144d device=0xa808 subvendor=0x144d subdevice=0xa801
vendor = 'Samsung Electronics Co Ltd'
device = 'NVMe SSD Controller SM981/PM981/PM983'
class = mass storage
subclass = NVM
pcib3@pci0:2:0:0: 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
pcib4@pci0:3:1:0: class=0x060400 rev=0x00 hdr=0x01 vendor=0x1022 device=0x57a3 subvendor=0x1022 subdevice=0x1453
vendor = 'Advanced Micro Devices, Inc. [AMD]'
device = 'Matisse PCIe GPP Bridge'
class = bridge
subclass = PCI-PCI
pcib5@pci0:3:4:0: class=0x060400 rev=0x00 hdr=0x01 vendor=0x1022 device=0x57a3 subvendor=0x1022 subdevice=0x1453
vendor = 'Advanced Micro Devices, Inc. [AMD]'
device = 'Matisse PCIe GPP Bridge'
class = bridge
subclass = PCI-PCI
pcib6@pci0:3:8:0: class=0x060400 rev=0x00 hdr=0x01 vendor=0x1022 device=0x57a4 subvendor=0x1022 subdevice=0x1484
vendor = 'Advanced Micro Devices, Inc. [AMD]'
device = 'Matisse PCIe GPP Bridge'
class = bridge
subclass = PCI-PCI
pcib7@pci0:3:9:0: class=0x060400 rev=0x00 hdr=0x01 vendor=0x1022 device=0x57a4 subvendor=0x1022 subdevice=0x1484
vendor = 'Advanced Micro Devices, Inc. [AMD]'
device = 'Matisse PCIe GPP Bridge'
class = bridge
subclass = PCI-PCI
pcib8@pci0:3:10:0: class=0x060400 rev=0x00 hdr=0x01 vendor=0x1022 device=0x57a4 subvendor=0x1022 subdevice=0x1484
vendor = 'Advanced Micro Devices, Inc. [AMD]'
device = 'Matisse PCIe GPP Bridge'
class = bridge
subclass = PCI-PCI
nvme1@pci0:4:0:0: class=0x010802 rev=0x01 hdr=0x00 vendor=0x1e4b device=0x1202 subvendor=0x1e4b subdevice=0x1202
vendor = 'MAXIO Technology (Hangzhou) Ltd.'
device = 'NVMe SSD Controller MAP1202 (DRAM-less)'
class = mass storage
subclass = NVM
re0@pci0:5:0:0: class=0x020000 rev=0x05 hdr=0x00 vendor=0x10ec device=0x8125 subvendor=0x1458 subdevice=0xe000
vendor = 'Realtek Semiconductor Co., Ltd.'
device = 'RTL8125 2.5GbE Controller'
class = network
subclass = ethernet
none1@pci0:6:0:0: class=0x130000 rev=0x00 hdr=0x00 vendor=0x1022 device=0x1485 subvendor=0x1022 subdevice=0x1485
vendor = 'Advanced Micro Devices, Inc. [AMD]'
device = 'Starship/Matisse Reserved SPP'
class = non-essential instrumentation
xhci0@pci0:6:0:1: class=0x0c0330 rev=0x00 hdr=0x00 vendor=0x1022 device=0x149c subvendor=0x1022 subdevice=0x1486
vendor = 'Advanced Micro Devices, Inc. [AMD]'
device = 'Matisse USB 3.0 Host Controller'
class = serial bus
subclass = USB
xhci1@pci0:6:0:3: 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@pci0:7:0:0: 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
ahci1@pci0:8:0:0: 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
pcib10@pci0:9:0:0: class=0x060400 rev=0x12 hdr=0x01 vendor=0x1002 device=0x1478 subvendor=0x0000 subdevice=0x0000
vendor = 'Advanced Micro Devices, Inc. [AMD/ATI]'
device = 'Navi 10 XL Upstream Port of PCI Express Switch'
class = bridge
subclass = PCI-PCI
pcib11@pci0:10:0:0: class=0x060400 rev=0x12 hdr=0x01 vendor=0x1002 device=0x1479 subvendor=0x1002 subdevice=0x1479
vendor = 'Advanced Micro Devices, Inc. [AMD/ATI]'
device = 'Navi 10 XL Downstream Port of PCI Express Switch'
class = bridge
subclass = PCI-PCI
vgapci0@pci0:11:0:0: class=0x030000 rev=0xcf hdr=0x00 vendor=0x1002 device=0x7480 subvendor=0x1043 subdevice=0x061b
vendor = 'Advanced Micro Devices, Inc. [AMD/ATI]'
device = 'Navi 33 [Radeon RX 7600/7600 XT/7600M XT/7600S/7700S / PRO W7600]'
class = display
subclass = VGA
hdac0@pci0:11:0:1: class=0x040300 rev=0x00 hdr=0x00 vendor=0x1002 device=0xab30 subvendor=0x1002 subdevice=0xab30
vendor = 'Advanced Micro Devices, Inc. [AMD/ATI]'
device = 'Navi 31 HDMI/DP Audio'
class = multimedia
subclass = HDA
none2@pci0:12:0:0: class=0x130000 rev=0x00 hdr=0x00 vendor=0x1022 device=0x145a subvendor=0x1022 subdevice=0x145a
vendor = 'Advanced Micro Devices, Inc. [AMD]'
device = 'Zeppelin/Raven/Raven2 PCIe Dummy Function'
class = non-essential instrumentation
none3@pci0:12:0:2: class=0x108000 rev=0x00 hdr=0x00 vendor=0x1022 device=0x1456 subvendor=0x1022 subdevice=0x1456
vendor = 'Advanced Micro Devices, Inc. [AMD]'
device = 'Family 17h (Models 00h-0fh) Platform Security Processor (PSP) 3.0 Device'
class = encrypt/decrypt
xhci2@pci0:12:0:3: class=0x0c0330 rev=0x00 hdr=0x00 vendor=0x1022 device=0x145f subvendor=0x1458 subdevice=0x5007
vendor = 'Advanced Micro Devices, Inc. [AMD]'
device = 'Zeppelin USB 3.0 xHCI Compliant Host Controller'
class = serial bus
subclass = USB
none4@pci0:13:0:0: class=0x130000 rev=0x00 hdr=0x00 vendor=0x1022 device=0x1455 subvendor=0x1022 subdevice=0x1455
vendor = 'Advanced Micro Devices, Inc. [AMD]'
device = 'Zeppelin/Renoir PCIe Dummy Function'
class = non-essential instrumentation
ahci2@pci0:13:0:2: class=0x010601 rev=0x51 hdr=0x00 vendor=0x1022 device=0x7901 subvendor=0x1458 subdevice=0xb002
vendor = 'Advanced Micro Devices, Inc. [AMD]'
device = 'FCH SATA Controller [AHCI mode]'
class = mass storage
subclass = SATA
hdac1@pci0:13:0:3: class=0x040300 rev=0x00 hdr=0x00 vendor=0x1022 device=0x1457 subvendor=0x1458 subdevice=0xa194
vendor = 'Advanced Micro Devices, Inc. [AMD]'
device = 'Family 17h (Models 00h-0fh) HD Audio Controller'
class = multimedia
subclass = HDA

DRM KMOD version
drm-66-kmod 6.6.25.1500068_8
drm-kmod 20250428

To Reproduce

1. Install FreeBSD 15-CURRENT with drm-kmod package.
2. Set amdgpu driver into kld_list inside rc.conf
3. Reboot the system and start a graphical session (Xorg or Sway).
4. Set any monitor to a refresh rate above 60 Hz.
5. System freezes, and both monitors lose signal and enter power saving mode.
6. After several seconds, the system spontaneously reboots.

Alternatively:

1. Boot with only one monitor connected and set it above 60 Hz
2. Connect a second monitor, and the crash occurs immediately.

Additional context

• GPU: ASUS Radeon RX 7600
• The same GPU and monitors work correctly on FreeBSD 14.4-RELEASE with drm-61-kmod.
• Monitors connected using DisplayPort