p16s recognizes but not utilizing eGPU

[130s]

As started looking in at #1120 (comment), Ubuntu does recognize eGPU but it doesn't seem to be utilized. As reoprted in #861 (comment), eGPU doesn't seem to start working up at all w/Unreal Engine. Blender is configured to render w/eGPU but I only see the dedicated GPU used.

CoS

• eGPU is utilized by graphics
• eGPU config stored as a file
• eGPU config added to SUCO

[130s]

What's the proper step on Ubuntu to utilize eGPU?

I haven't run into a proper article yet, https://gist.github.com/valteu/1c0a9b7288cc3d77a6654a4d22d0ce9f suggests using so-called egpu-switcher, which seems to be originally announced on egpu.io. So downloaded egpu-switcher-amd64 v0.19.0 (latest as of 2024/12).

$ sudo chmod 755 /opt/hertg/egpu-switcher-amd64
$ sudo ln -s /opt/hertg/egpu-switcher-amd64 /usr/bin/egpu-switcher
ln: failed to create symbolic link '/usr/bin/egpu-switcher': File exists
/opt/hertg$ sudo rm /usr/bin/egpu-switcher 
/opt/hertg$ sudo ln -s /opt/hertg/egpu-switcher-amd64 /usr/bin/egpu-switcher
/opt/hertg$ sudo egpu-switcher enable        
[info] no eGPU has been configured yet

Found 3 possible GPU(s)...

1:      Intel Corporation Alder Lake-P Integrated Graphics Controller (i915)
2:      NVIDIA Corporation Device 1fb7 (nvidia)
3:      NVIDIA Corporation Device 2805 (nvidia)

Which one is your external GPU? [1-3]: 

It asks which ones are eGPU?

Based on the following output, 52:00.0 and 52:00.1 can be eGPUs? I assume for now there are two 52:00s as my RTX 4060 is dual (not sure if I'm right).
(UPDATE 20250127) Hence, chose the num 3 above that shows "2805".

$ lspci | grep NVIDIA
03:00.0 3D controller: NVIDIA Corporation Device 1fb7 (rev a1)
52:00.0 VGA compatible controller: NVIDIA Corporation Device 2805 (rev a1)
52:00.1 Audio device: NVIDIA Corporation Device 22bd (rev a1)

Every 2.0s: nvidia-smi                              130s-p16s: Tue Dec 17 12:22:17 2024

Tue Dec 17 12:22:17 2024
+---------------------------------------------------------------------------------------+
| NVIDIA-SMI 535.183.01             Driver Version: 535.183.01   CUDA Version: 12.2     |
|-----------------------------------------+----------------------+----------------------+
| GPU  Name                 Persistence-M | Bus-Id        Disp.A | Volatile Uncorr. ECC |
| Fan  Temp   Perf          Pwr:Usage/Cap |         Memory-Usage | GPU-Util  Compute M. |
|                                         |                      |               MIG M. |
|=========================================+======================+======================|
|   0  NVIDIA T550 Laptop GPU         Off | 00000000:03:00.0 Off |                  N/A |
| N/A   53C    P0              11W /  30W |    812MiB /  4096MiB |     12%      Default |
|                                         |                      |                  N/A |
+-----------------------------------------+----------------------+----------------------+
|   1  NVIDIA GeForce RTX 4060 Ti     Off | 00000000:52:00.0 Off |                  N/A |
|  0%   32C    P8              10W / 165W |      8MiB / 16380MiB |      0%      Default |
|                                         |                      |                  N/A |
+-----------------------------------------+----------------------+----------------------+

+---------------------------------------------------------------------------------------+
| Processes:                                                                            |
|  GPU   GI   CI        PID   Type   Process name                            GPU Memory |
|        ID   ID                                                             Usage      |
|=======================================================================================|
|    0   N/A  N/A      3977      G   /usr/lib/xorg/Xorg                          358MiB |
|    0   N/A  N/A      4630      G   /usr/bin/compiz                             165MiB |
|    0   N/A  N/A      4724      G   ...irefox/5437/usr/lib/firefox/firefox      214MiB |
|    1   N/A  N/A      3977      G   /usr/lib/xorg/Xorg                            4MiB |
+---------------------------------------------------------------------------------------+

Rebooting OS now.

[130s]

$ nvidia-smi
Tue Dec 17 12:39:43 2024       
+---------------------------------------------------------------------------------------+
| NVIDIA-SMI 535.183.01             Driver Version: 535.183.01   CUDA Version: 12.2     |
|-----------------------------------------+----------------------+----------------------+
| GPU  Name                 Persistence-M | Bus-Id        Disp.A | Volatile Uncorr. ECC |
| Fan  Temp   Perf          Pwr:Usage/Cap |         Memory-Usage | GPU-Util  Compute M. |
|                                         |                      |               MIG M. |
|=========================================+======================+======================|
|   0  NVIDIA T550 Laptop GPU         Off | 00000000:03:00.0 Off |                  N/A |
| N/A   52C    P8               5W /  30W |      4MiB /  4096MiB |      0%      Default |
|                                         |                      |                  N/A |
+-----------------------------------------+----------------------+----------------------+
|   1  NVIDIA GeForce RTX 4060 Ti     Off | 00000000:52:00.0 Off |                  N/A |
|  0%   41C    P3              18W / 165W |   4215MiB / 16380MiB |     24%      Default |
|                                         |                      |                  N/A |
+-----------------------------------------+----------------------+----------------------+
                                                                                         
+---------------------------------------------------------------------------------------+
| Processes:                                                                            |
|  GPU   GI   CI        PID   Type   Process name                            GPU Memory |
|        ID   ID                                                             Usage      |
|=======================================================================================|
|    1   N/A  N/A      3327      G   /usr/lib/xorg/Xorg                          535MiB |
|    1   N/A  N/A      3984      G   /usr/bin/compiz                             158MiB |
|    1   N/A  N/A      4082      G   ...irefox/5437/usr/lib/firefox/firefox      178MiB |
|    1   N/A  N/A      6858    C+G   .../Engine/Binaries/Linux/UnrealEditor     3277MiB |
+---------------------------------------------------------------------------------------+

Worked!
All processes in this tool are now using GPU 1, not 0.

Dedicated monitor size changed to 1920x1080 (16x9) for some reason, so manually switched back to 1920x1200 (16x10).

So, I guess what was missing was x.org config, same as the author of egpu-switcher?

[130s]

I hadn't had to re-modify /etc/default/grub as instructed at https://gist.github.com/valteu/1c0a9b7288cc3d77a6654a4d22d0ce9f#file-ubuntu_egpu-L16

[130s]

CPU benchmark
https://pc.watch.impress.co.jp/docs/column/ubuntu/1649458.html
Phoronics?