cpu-x show warning: Your GPU user mode driver is unknown for vendor AMD: 4.6 (Compatibility Profile) Mesa 24.3.4-arch1.1

[realyukii]

I check loaded kernel module and it show amdgpu and nvidia:

$  lspci -v -nn -d ::03xx
01:00.0 VGA compatible controller [0300]: NVIDIA Corporation AD106M [GeForce RTX 4070 Max-Q / Mobile] [10de:2860] (rev a1) (prog-if 00 [VGA controller])
        Subsystem: ASUSTeK Computer Inc. Device [1043:23bd]
        Physical Slot: 0
        Flags: bus master, fast devsel, latency 0, IRQ 50, IOMMU group 15
        Memory at dc000000 (32-bit, non-prefetchable) [size=16M]
        Memory at 7c00000000 (64-bit, prefetchable) [size=8G]
        Memory at 7e00000000 (64-bit, prefetchable) [size=32M]
        I/O ports at f000 [size=128]
        Expansion ROM at dd000000 [virtual] [disabled] [size=512K]
        Capabilities: <access denied>
        Kernel driver in use: nvidia
        Kernel modules: nouveau, nvidia_drm, nvidia

66:00.0 VGA compatible controller [0300]: Advanced Micro Devices, Inc. [AMD/ATI] Phoenix1 [1002:15bf] (rev c1) (prog-if 00 [VGA controller])
        Subsystem: ASUSTeK Computer Inc. Device [1043:23bd]
        Flags: bus master, fast devsel, latency 0, IRQ 43, IOMMU group 20
        Memory at 7e10000000 (64-bit, prefetchable) [size=256M]
        Memory at dd200000 (64-bit, prefetchable) [size=2M]
        I/O ports at d000 [size=256]
        Memory at dd700000 (32-bit, non-prefetchable) [size=512K]
        Capabilities: <access denied>
        Kernel driver in use: amdgpu
        Kernel modules: amdgpu

but why cpu-x print warning about Mesa despite the in-use kernel driver is amdgpu or nvidia? I think I simply don't understand how the whole process work together?

[realyukii]

I think I kind of get it from deepseek's responses:

The amdgpu (/lib/modules/6.13.2-arch1-1/kernel/drivers/gpu/drm/amd/amdgpu/amdgpu.ko.zst) driver and Mesa's libgallium-24.3.4-arch1.1.so are complementary components in the Linux graphics stack for AMD GPUs. Here's their relationship:

1. amdgpu (Kernel Driver)

• Role: A kernel-space driver that directly manages AMD GPU hardware (e.g., memory, power, display output, compute units).
• Function: Handles low-level communication with the GPU, memory management, and hardware abstraction for the kernel.
• Location: Part of the Linux kernel (loaded as amdgpu kernel module).

2. Mesa's Gallium Library (User-Space Driver)

• Role: A user-space library (part of Mesa) that implements graphics APIs like OpenGL, Vulkan, and OpenCL.
• Function:
  • Gallium3D: A framework within Mesa that simplifies driver development. The libgallium shared object (.so) contains the Gallium driver for AMD GPUs (e.g., radeonsi for OpenGL, radv for Vulkan).
  • Translates API Calls: Converts OpenGL/Vulkan commands into GPU-specific instructions (using the amdgpu kernel driver via libdrm).
• Versioning: The filename libgallium-24.3.4-arch1.1.so indicates:
  • Mesa version 24.3.4.
  • Custom Arch Linux packaging (arch1.1).

3. Interaction Between Them

• Applications (e.g., games, compositors) use Mesa's Gallium driver (libgallium) to render graphics.
• Mesa sends hardware commands to the amdgpu kernel driver via libdrm (Direct Rendering Manager), which acts as a bridge between user-space and the kernel.
• amdgpu executes these commands on the GPU hardware.

Summary

• amdgpu: Manages the GPU at the kernel level.
• Mesa/libgallium: Implements high-level graphics APIs and relies on amdgpu (via libdrm) to issue GPU commands.
• Together: They form the open-source graphics stack for AMD GPUs on Linux, enabling applications to use OpenGL/Vulkan while abstracting hardware details.

Example Workflow

1. Application → OpenGL call → Mesa (libgallium) → Gallium driver → libdrm → amdgpu kernel driver → GPU hardware.

and I think I should change my question: if mesa is unknown or unrecognized by cpu-x, what is an example for user mode driver considered 'known' for AMD vendor?

[TheTumultuousUnicornOfDarkness]

I am not sure to understand your issue without any CPU-X output.
Please run the cpu-x --issue-fmt (or ./CPU-X-vx.y.z-aaa.AppImage --issue-fmt for AppImage) as root and attach both /tmp/cpu-x.log and /tmp/cpu-x-daemon.log files here.

[realyukii]

actually it's not an issue, it's more like a question, I'm sorry if this is not a appropriate place to ask

• cpu-x.log
• cpu-x-daemon.log

[TheTumultuousUnicornOfDarkness]

Thanks for the logs, it seems there is a bug for me.
So you have an AMD Ryzen 9 7940HS CPU with a Radeon 780M iGPU, using Mesa as user-mode driver (UMD) and amdgpu as kernel driver.
But you have also a NVIDIA GeForce RTX 4070 using the proprietary driver, and it does not report an user-mode driver for this one.

Maybe it is a stupid question, but do you have installed drivers for your GeForce RTX 4070?

[realyukii]

it seems there is a bug for me.

is the log: 'Your GPU user mode driver is unknown for vendor AMD: 4.6 (Compatibility Profile) Mesa 24.3.4-arch1.1' a bug?

Maybe it is a stupid question, but do you have installed drivers for your GeForce RTX 4070?

Err.. I'm not sure, how do I check if I have user mode driver for nvidia? does vulkan counted as one of them?

[realyukii]

after checking on the Internet about UMD for nvidia proprietary driver, I guess I have installed it:

$ find / -iname "*libGLX_nvidia*" 2>/dev/null
/usr/lib/libGLX_nvidia.so.0
/usr/lib/libGLX_nvidia.so.570.86.16
/usr/lib/libGLX_nvidia.so
$ pacman -Qo /usr/lib/libGLX_nvidia.so.0
/usr/lib/libGLX_nvidia.so.0 is owned by nvidia-utils 570.86.16-2

But you have also a NVIDIA GeForce RTX 4070 using the proprietary driver, and it does not report an user-mode driver for this one.

and yeah the cpu-x shows empty/blank in the UMD version:

[TheTumultuousUnicornOfDarkness]

it seems there is a bug for me.

is the log: 'Your GPU user mode driver is unknown for vendor AMD: 4.6 (Compatibility Profile) Mesa 24.3.4-arch1.1' a bug?

It depends:

• if UMD is not installed, the warning is purely informative and intended for user
• if UMD is installed, the warning shows CPU-X is not able to detect it, so it may be a bug somewhere, but I need to investigate

after checking on the Internet about UMD for nvidia proprietary driver, I guess I have installed it

Indeed.

But you have also a NVIDIA GeForce RTX 4070 using the proprietary driver, and it does not report an user-mode driver for this one.

and yeah the cpu-x shows empty/blank in the UMD version:

FYI you don't need to provide a screenshot since everything is present in cpu-x.log.