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Ubuntu - GPU - AMD GPU - Check which kernel driver is loaded

lspci -k | grep -A 3 -E "(VGA|3D)"

returns:

0c:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Device 744c (rev c8)
	Subsystem: Gigabyte Technology Co., Ltd Device 240e
	Kernel driver in use: amdgpu
	Kernel modules: amdgpu

NOTE: This shows that the kernel driver is amdgpu.

If kernel driver is not amdgpu

If the amdgpu driver is not in use, follow the instructions at Enable AMDGPU Linux Driver.

glxinfo -B

returns:

name of display: :0
display: :0  screen: 0
direct rendering: Yes
Extended renderer info (GLX_MESA_query_renderer):
    Vendor: AMD (0x1002)
    Device: Radeon RX 7900 XTX (gfx1100, LLVM 15.0.3, DRM 3.48, 5.19.0-43-generic) (0x744c)
    Version: 22.3.0
    Accelerated: yes
    Video memory: 24576MB
    Unified memory: no
    Preferred profile: core (0x1)
    Max core profile version: 4.6
    Max compat profile version: 4.6
    Max GLES1 profile version: 1.1
    Max GLES[23] profile version: 3.2
Memory info (GL_ATI_meminfo):
    VBO free memory - total: 23811 MB, largest block: 23811 MB
    VBO free aux. memory - total: 32053 MB, largest block: 32053 MB
    Texture free memory - total: 23811 MB, largest block: 23811 MB
    Texture free aux. memory - total: 32053 MB, largest block: 32053 MB
    Renderbuffer free memory - total: 23811 MB, largest block: 23811 MB
    Renderbuffer free aux. memory - total: 32053 MB, largest block: 32053 MB
Memory info (GL_NVX_gpu_memory_info):
    Dedicated video memory: 24576 MB
    Total available memory: 56703 MB
    Currently available dedicated video memory: 23811 MB
OpenGL vendor string: AMD
OpenGL renderer string: Radeon RX 7900 XTX (gfx1100, LLVM 15.0.3, DRM 3.48, 5.19.0-43-generic)
OpenGL core profile version string: 4.6 (Core Profile) Mesa 22.3.0-devel
OpenGL core profile shading language version string: 4.60
OpenGL core profile context flags: (none)
OpenGL core profile profile mask: core profile
 
OpenGL version string: 4.6 (Compatibility Profile) Mesa 22.3.0-devel
OpenGL shading language version string: 4.60
OpenGL context flags: (none)
OpenGL profile mask: compatibility profile
 
OpenGL ES profile version string: OpenGL ES 3.2 Mesa 22.3.0-devel
OpenGL ES profile shading language version string: OpenGL ES GLSL ES 3.20