Public bug reported:

after installing linux oam kernel my gpu is not loaded anymore.
This is not happening with the same version of linux generic kernel

❯ sudo nvidia-smi
NVIDIA-SMI has failed because it couldn't communicate with the NVIDIA driver. 
Make sure that the latest NVIDIA driver is installed and running.

the only log I can find in my system
Mar 03 09:00:43 phoenix systemd[1]: Failed to start 
nvidia-fabricmanager.service - NVIDIA fabric manager service.

and If I try to run this process manually
❯ sudo /usr/bin/nv-fabricmanager -c /usr/share/nvidia/nvswitch/fabricmanager.cfg
failed to allocate handle (client) to NVIDIA GPU driver
❯ lsmod | grep nvidia
# no output

System Information
 Manufacturer: LENOVO
 Version: ThinkPad P16v Gen 1
 SKU Number: LENOVO_MT_21FE_BU_Think_FM_ThinkPad P16v Gen 1
 Family: ThinkPad P16v Gen 1
❯ lspci | grep -i nvidia
01:00.0 3D controller: NVIDIA Corporation AD107GLM [RTX 2000 Ada Generation 
Laptop GPU] (rev a1)

uname -a
Linux phoenix 6.8.0-1020-oem #20-Ubuntu SMP PREEMPT_DYNAMIC Wed Jan 22 08:17:35 
UTC 2025 x86_64 x86_64 x86_64 GNU/Linux

❯ cat /etc/os-release         
PRETTY_NAME="Ubuntu 24.04.2 LTS"
NAME="Ubuntu"
VERSION_ID="24.04"

** Affects: linux (Ubuntu)
     Importance: Undecided
         Status: New

** Description changed:

  after installing linux oam kernel my gpu is not loaded anymore.
- This is not happening with the same version of linux generic kernel 
- 
+ This is not happening with the same version of linux generic kernel
  
  ❯ sudo nvidia-smi
  NVIDIA-SMI has failed because it couldn't communicate with the NVIDIA driver. 
Make sure that the latest NVIDIA driver is installed and running.
  
  the only log I can find in my system
  Mar 03 09:00:43 phoenix systemd[1]: Failed to start 
nvidia-fabricmanager.service - NVIDIA fabric manager service.
  
  and If I try to run this process manually
  ❯ sudo /usr/bin/nv-fabricmanager -c 
/usr/share/nvidia/nvswitch/fabricmanager.cfg
  failed to allocate handle (client) to NVIDIA GPU driver
  ❯ lsmod | grep nvidia
  # no output
  
  System Information
-       Manufacturer: LENOVO
-       Version: ThinkPad P16v Gen 1
-       SKU Number: LENOVO_MT_21FE_BU_Think_FM_ThinkPad P16v Gen 1
-       Family: ThinkPad P16v Gen 1
+  Manufacturer: LENOVO
+  Version: ThinkPad P16v Gen 1
+  SKU Number: LENOVO_MT_21FE_BU_Think_FM_ThinkPad P16v Gen 1
+  Family: ThinkPad P16v Gen 1
  ❯ lspci | grep -i nvidia
  01:00.0 3D controller: NVIDIA Corporation AD107GLM [RTX 2000 Ada Generation 
Laptop GPU] (rev a1)
  
  uname -a
  Linux phoenix 6.8.0-1020-oem #20-Ubuntu SMP PREEMPT_DYNAMIC Wed Jan 22 
08:17:35 UTC 2025 x86_64 x86_64 x86_64 GNU/Linux
+ 
+ ❯ cat /etc/os-release         
+ PRETTY_NAME="Ubuntu 24.04.2 LTS"
+ NAME="Ubuntu"
+ VERSION_ID="24.04"

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https://bugs.launchpad.net/bugs/2100795

Title:
  Nvidia gpu is not recognized with linux oem kernel

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