*** This bug is a duplicate of bug 1970291 ***
    https://bugs.launchpad.net/bugs/1970291

Then onto check why the GPU is not even being detected ...

beadon@semiauto:~$ 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.

beadon@semiauto:~$ dkms status
8812au/5.6.4.2_35491.20191025, 6.2.0-23-generic, x86_64: installed
8812au/5.6.4.2_35491.20191025, 6.2.0-24-generic, x86_64: installed
nvidia/535.54.03, 6.2.0-24-generic, x86_64: installed
virtualbox/7.0.6, 6.2.0-23-generic, x86_64: installed
virtualbox/7.0.6, 6.2.0-24-generic, x86_64: installed
beadon@semiauto:~$ dpkg-reconfigure nvidia-dkms
/usr/sbin/dpkg-reconfigure must be run as root
beadon@semiauto:~$ sudo dpkg-reconfigure nvidia-dkms-535 
Removing all DKMS Modules
Done.
update-initramfs: deferring update (trigger activated)
INFO:Enable nvidia
DEBUG:Parsing /usr/share/ubuntu-drivers-common/quirks/lenovo_thinkpad
DEBUG:Parsing /usr/share/ubuntu-drivers-common/quirks/put_your_quirks_here
DEBUG:Parsing /usr/share/ubuntu-drivers-common/quirks/dell_latitude
Loading new nvidia-535.54.03 DKMS files...
Building for 6.2.0-24-generic
Building for architecture x86_64
Building initial module for 6.2.0-24-generic
Done.

nvidia.ko:
Running module version sanity check.
Module version 535.54.03 for nvidia.ko
exactly matches what is already found in kernel 6.2.0-24-generic.
DKMS will not replace this module.
You may override by specifying --force.

nvidia-modeset.ko:
Running module version sanity check.
Module version 535.54.03 for nvidia-modeset.ko
exactly matches what is already found in kernel 6.2.0-24-generic.
DKMS will not replace this module.
You may override by specifying --force.

nvidia-drm.ko:
Running module version sanity check.
Module version 535.54.03 for nvidia-drm.ko
exactly matches what is already found in kernel 6.2.0-24-generic.
DKMS will not replace this module.
You may override by specifying --force.

nvidia-uvm.ko:
Running module version sanity check.
Module version 535.54.03 for nvidia-uvm.ko
exactly matches what is already found in kernel 6.2.0-24-generic.
DKMS will not replace this module.
You may override by specifying --force.

nvidia-peermem.ko:
Running module version sanity check.
Module version 535.54.03 for nvidia-peermem.ko
exactly matches what is already found in kernel 6.2.0-24-generic.
DKMS will not replace this module.
You may override by specifying --force.
depmod...
Processing triggers for initramfs-tools (0.142ubuntu2) ...
update-initramfs: Generating /boot/initrd.img-6.2.0-24-generic


hmm, modules are in place ..

-- 
You received this bug notification because you are a member of Desktop
Packages, which is subscribed to gnome-shell in Ubuntu.
https://bugs.launchpad.net/bugs/2026790

Title:
  Slow refresh rate (5-6hz) on Display managed by gnome-shell

Status in gnome-shell package in Ubuntu:
  New
Status in nvidia-graphics-drivers-535 package in Ubuntu:
  New

Bug description:
  NVIDIA GPU sending out frames to an LG Electronics 27" display.

  At the moment, just a single display.

  The NVIDIA GPU is available across a Thunderbolt 3 link.

  Here is what the Nvidia Drivers are reporting:

  beadon@semiauto:~$ nvidia-smi 
  Mon Jul 10 20:35:25 2023       
  
+---------------------------------------------------------------------------------------+
  | NVIDIA-SMI 535.54.03              Driver Version: 535.54.03    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 GeForce GTX 1650        Off | 00000000:52:00.0  On |            
      N/A |
  |  0%   33C    P8              N/A /  85W |     99MiB /  4096MiB |      0%    
  Default |
  |                                         |                      |            
      N/A |
  
+-----------------------------------------+----------------------+----------------------+
                                                                                
           
  
+---------------------------------------------------------------------------------------+
  | Processes:                                                                  
          |
  |  GPU   GI   CI        PID   Type   Process name                            
GPU Memory |
  |        ID   ID                                                             
Usage      |
  
|=======================================================================================|
  |    0   N/A  N/A      2341      G   /usr/bin/gnome-shell                     
     1MiB |
  
+---------------------------------------------------------------------------------------+


  Performing an strace I am seeing that the gnome-shell is **very** frequently 
hitting :
  EAGAIN (Resource temporarily unavailable)

  It's not clear to me what is causing this.  strace on the 33 threads
  included for reference.  To show different behaviors, clicks, movement
  of windows, typing in a terminal, as running glxgears to show(get) the
  refresh rate of 5 frames per second.

  Is there some kind of heavy CPU-based communication happening for
  gnome-shell ?  I am seeing the CPU usage spike to 90+% when simple
  movements are done on screen.  However, the nvidia-smi tools reports
  that it truly is attached to the right GPU, the PID is correct.

  
  Please see the strace for further information.

  ProblemType: Bug
  DistroRelease: Ubuntu 23.04
  Package: gnome-shell 44.2-0ubuntu1
  ProcVersionSignature: Ubuntu 6.2.0-24.24-generic 6.2.12
  Uname: Linux 6.2.0-24-generic x86_64
  NonfreeKernelModules: nvidia_modeset nvidia
  ApportVersion: 2.26.1-0ubuntu2
  Architecture: amd64
  CasperMD5CheckResult: pass
  CurrentDesktop: ubuntu:GNOME
  Date: Mon Jul 10 20:40:20 2023
  DisplayManager: gdm3
  InstallationDate: Installed on 2023-01-09 (182 days ago)
  InstallationMedia: Ubuntu 22.04.1 LTS "Jammy Jellyfish" - Release amd64 
(20220809.1)
  ProcEnviron:
   LANG=en_US.UTF-8
   PATH=(custom, no user)
   SHELL=/bin/bash
   TERM=xterm-256color
   XDG_RUNTIME_DIR=<set>
  RelatedPackageVersions: mutter-common 44.2-0ubuntu1
  SourcePackage: gnome-shell
  UpgradeStatus: Upgraded to lunar on 2023-04-26 (75 days ago)

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