Is this the same file as before?
nouveau is still loaded and the kern.log is full of these:
May 4 11:16:58 ozd2085u kernel: [ 16.944027] nvidia-nvlink: Unregistered the Nvlink Core, major device number 237
May 4 11:16:58 ozd2085u kernel: [ 17.317870] nvidia-nvlink: Nvlink Core is being initialized, major device number 237
May 4 11:16:58 ozd2085u kernel: [ 17.318246] NVRM: The NVIDIA probe routine was not called for 1 device(s).
May 4 11:16:58 ozd2085u kernel: [ 17.318247] NVRM: This can occur when a driver such as:
May 4 11:16:58 ozd2085u kernel: [ 17.318247] NVRM: nouveau, rivafb, nvidiafb or rivatv
May 4 11:16:58 ozd2085u kernel: [ 17.318247] NVRM: was loaded and obtained ownership of the NVIDIA device(s).
May 4 11:16:58 ozd2085u kernel: [ 17.318248] NVRM: Try unloading the conflicting kernel module (and/or
May 4 11:16:58 ozd2085u kernel: [ 17.318248] NVRM: reconfigure your kernel without the conflicting
May 4 11:16:58 ozd2085u kernel: [ 17.318248] NVRM: driver(s)), then try loading the NVIDIA kernel module
May 4 11:16:58 ozd2085u kernel: [ 17.318248] NVRM: again.
May 4 11:16:58 ozd2085u kernel: [ 17.318248] NVRM: No NVIDIA devices probed.
To reduce the log size, pleas remove the kern.log
sudo rm /var/log/kern.log
Then install the nvidia driver
sudo apt install nvidia-driver-460
and reboot. Immediately after reboot, please create a new nvidia-bug-report.log.
I don’t know what you’re doing but you’re definitely not doing things correctly. Nouveau is still not blacklisted, the log was taken after being up for 30 minutes, don’t know if you rebooted at all. Also, you’re booting into the wrong kernel, please choose 5.4.0.70 on grub menu.
For an easier method to blacklist nouveau, please set kernel parameter
nomodeset https://wiki.ubuntu.com/Kernel/KernelBootParameters
It’s in the given link, scroll down, read and follow the instructions in the chapter “Permanently Add a Kernel Boot Parameter”
Regardless of that, did you boot to the correct kernel meanwhile?
According to your logs, you have 5.4.0.66 and 5.4.0.77 installed, at least the nvidia driver was installed for that.
Since you said “we are using customized image for our organization”, do you use PXE boot, i.e. boot the image over network? Then the network image has to be modified, i.e. the driver installed.
Then you’re using either using network boot or the system’s config is central managed so you can’t change your boot config. Please ask the person responsible for managing your network/devices.