Linux warns: `CRAT table not found`

On the Dell Precision 3540/0M14W7 with

$ lspci -nn -s 3b:00.0
3b:00.0 Display controller [0380]: Advanced Micro Devices, Inc. [AMD/ATI] Lexa XT [Radeon PRO WX 3100] [1002:6985]

Linux 5.16.7 (Debian sid/unstable) (and at least 5.15.5-2) logs the warning below:

[  460.997179] amdgpu: CRAT table not found

As this is a warning, what can be done about it?

• Output of dmesg

Same warning with the latest system firmware 1.15.0:

[   17.376425] amdgpu: CRAT table not found

What should the user do about? Should the manufacturer fix the firmware?

Or is the warning log level incorrect, as some virtual table is created?

[   17.376433] amdgpu: Virtual CRAT table created for CPU

@fxkuehl The CRAT table should be included in the APCI implementation on the platform. The OEM should have included it. IIRC, if it's missing on an APU, you can't use ROCm on that platform.

As far as I can find out online, Dell Precision 3540/0M14W7 uses an Intel CPU. CRAT tables are only applicable on some AMD APUs. The message is perfectly expected.

Even on AMD APUs we can now fall back to treating it like a dGPU when the CRAT table is missing. So the message should probably not be a warning any more.

Yes, as logged in the output of dmesg, an Intel CPU is used. In this case:

smpboot: CPU0: Intel(R) Core(TM) i7-8665U CPU @ 1.90GHz (family: 0x6, model: 0x8e, stepping: 0xc)

https://patchwork.freedesktop.org/patch/475181/

mentioned in commit agd5f/linux@1eacdfbf

mentioned in commit agd5f/linux@9dff13f9

FWIW, I get these similarly questionable warnings:

[    4.102892] amdgpu 0000:28:00.0: amdgpu: PSP runtime database doesn't exist
[    4.641118] amdgpu: SRAT table not found

mentioned in commit nouveau@58b176d5

mentioned in commit nouveau@a45af7e3

Hi all, just for the record: I can confirm this CRAT table not found error also for an ASUS M3700WUA AiO PC running Kubuntu 22.04 LTS with kernel 5.15.0-40-generic. Secure boot is disabled and the latest ASUS firmware (as of June 2022) is installed. In my case there exist an additional ACPI firmware-bug warning, see below. Otherwise everything is running fine.

[    2.860409] [drm] reserve 0x400000 from 0xf41f800000 for PSP TMR
[    2.943916] amdgpu 0000:04:00.0: amdgpu: RAS: optional ras ta ucode is not available
[    2.952806] amdgpu 0000:04:00.0: amdgpu: RAP: optional rap ta ucode is not available
[    2.952809] amdgpu 0000:04:00.0: amdgpu: SECUREDISPLAY: securedisplay ta ucode is not available
[    2.955179] amdgpu 0000:04:00.0: amdgpu: SMU is initialized successfully!
[    2.956436] [drm] kiq ring mec 2 pipe 1 q 0
[    2.959597] [drm] Display Core initialized with v3.2.149!
[    2.960222] [drm] DMUB hardware initialized: version=0x0101001F
[    3.091555] [drm] VCN decode and encode initialized successfully(under DPG Mode).
[    3.091569] [drm] JPEG decode initialized successfully.
[    3.092741] kfd kfd: amdgpu: Allocated 3969056 bytes on gart
[    3.111427] memmap_init_zone_device initialised 131072 pages in 0ms
[    3.111435] amdgpu: HMM registered 512MB device memory
[    3.111465] amdgpu: SRAT table not found
[    3.111466] amdgpu: Virtual CRAT table created for GPU
[    3.111565] amdgpu: Topology: Add dGPU node [0x164c:0x1002]
[    3.111569] kfd kfd: amdgpu: added device 1002:164c
[    3.111617] amdgpu 0000:04:00.0: amdgpu: SE 1, SH per SE 1, CU per SH 8, active_cu_number 8
[    3.114716] [drm] fb mappable at 0x410CD3000
[    3.114718] [drm] vram apper at 0x410000000
[    3.114718] [drm] size 8294400
[    3.114719] [drm] fb depth is 24
[    3.114719] [drm]    pitch is 7680
[    3.114783] fbcon: amdgpudrmfb (fb0) is primary device
[    3.179420] Console: switching to colour frame buffer device 240x67
[    3.199203] amdgpu 0000:04:00.0: [drm] fb0: amdgpudrmfb frame buffer device
[    3.221917] amdgpu 0000:04:00.0: amdgpu: ring gfx uses VM inv eng 0 on hub 0
[    3.221924] amdgpu 0000:04:00.0: amdgpu: ring comp_1.0.0 uses VM inv eng 1 on hub 0
[    3.221927] amdgpu 0000:04:00.0: amdgpu: ring comp_1.1.0 uses VM inv eng 4 on hub 0
[    3.221929] amdgpu 0000:04:00.0: amdgpu: ring comp_1.2.0 uses VM inv eng 5 on hub 0
[    3.221931] amdgpu 0000:04:00.0: amdgpu: ring comp_1.3.0 uses VM inv eng 6 on hub 0
[    3.221932] amdgpu 0000:04:00.0: amdgpu: ring comp_1.0.1 uses VM inv eng 7 on hub 0
[    3.221934] amdgpu 0000:04:00.0: amdgpu: ring comp_1.1.1 uses VM inv eng 8 on hub 0
[    3.221936] amdgpu 0000:04:00.0: amdgpu: ring comp_1.2.1 uses VM inv eng 9 on hub 0
[    3.221937] amdgpu 0000:04:00.0: amdgpu: ring comp_1.3.1 uses VM inv eng 10 on hub 0
[    3.221940] amdgpu 0000:04:00.0: amdgpu: ring kiq_2.1.0 uses VM inv eng 11 on hub 0
[    3.221942] amdgpu 0000:04:00.0: amdgpu: ring sdma0 uses VM inv eng 0 on hub 1
[    3.221944] amdgpu 0000:04:00.0: amdgpu: ring vcn_dec uses VM inv eng 1 on hub 1
[    3.221946] amdgpu 0000:04:00.0: amdgpu: ring vcn_enc0 uses VM inv eng 4 on hub 1
[    3.221948] amdgpu 0000:04:00.0: amdgpu: ring vcn_enc1 uses VM inv eng 5 on hub 1
[    3.221949] amdgpu 0000:04:00.0: amdgpu: ring jpeg_dec uses VM inv eng 6 on hub 1
[    3.224099] [drm] Initialized amdgpu 3.42.0 20150101 for 0000:04:00.0 on minor 0

[    0.288767] ACPI BIOS Error (bug): Could not resolve symbol [\_SB.PCI0.GPP4.WLAN], AE_NOT_FOUND (20210730/dswload2-162)
[    0.288773] fbcon: Taking over console
[    0.288779] ACPI Error: AE_NOT_FOUND, During name lookup/catalog (20210730/psobject-220)

test@ASUS-AIO:~$ inxi -b
System:
  Host: ASUS-AIO Kernel: 5.15.0-40-generic x86_64 bits: 64
    Desktop: KDE Plasma 5.24.4 Distro: Ubuntu 22.04 LTS (Jammy Jellyfish)
Machine:
  Type: Desktop Mobo: ASUSTeK model: M3700WUA v: 1.0
    serial: <superuser required> UEFI: American Megatrends LLC. v: M3700WUA.306
    date: 05/09/2022
CPU:
  Info: 8-core AMD Ryzen 7 5700U with Radeon Graphics [MT MCP] speed (MHz):
    avg: 1201 min/max: 400/4372
Graphics:
  Device-1: AMD Lucienne driver: amdgpu v: kernel
  Device-2: Quanta USB2.0 HD UVC WebCam type: USB driver: uvcvideo
  Display: x11 server: X.Org v: 1.21.1.3 driver: X: loaded: amdgpu,ati
    unloaded: fbdev,modesetting,vesa gpu: amdgpu resolution: 1920x1080~60Hz
  OpenGL: renderer: AMD RENOIR (LLVM 13.0.1 DRM 3.42 5.15.0-40-generic)
    v: 4.6 Mesa 22.0.1
Network:
  Device-1: Realtek RTL8111/8168/8411 PCI Express Gigabit Ethernet
    driver: r8169
  Device-2: Intel Wi-Fi 6 AX200 driver: iwlwifi
Drives:
  Local Storage: total: 1.83 TiB used: 10.64 GiB (0.6%)
Info:
  Processes: 326 Uptime: 7m Memory: 15.03 GiB used: 1.69 GiB (11.3%)
  Shell: Bash inxi: 3.3.13

This issue hasn't had any activity since 2022-06-30. The AMD driver stack changes rapidly and contains lots of shared code across products so it's possible that it has already been fixed. Please upgrade to a current stable kernel and userspace stack and try again. If you still experience this issue with the latest driver stack, please capture relevant logging and open a new issue referring back to this one.

closed