21.04 Hirsute Hippo on old laptop

Upgrade from Focal > Groovy > Hirsute and Nvidia 340 driver failed to install with

Everything else went OK apart from empty software boutique just the Nvidia driver failure.
So did a fresh install from the latest daily current and still Nvidia driver failure.
This is not a bug as I found out by searching online and finding Nvidia no longer supports this newer Kernel

Everything seems to work fine except I have to use the nouveau driver for display as Nvidia have dropped support for the Kernel which we are going to be using.

So as Linus Torvalds gestured to Nvidia

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Which Nvidia card do you have?

Have you tried to get needed version number for it using wizard from https://www.nvidia.com/download/index.aspx?lang=en-us ?

340 as shown in the middle pic and install error in the top pic

Please answer above questions.

I thought I did
How do I apply the patches from here?

No. For example on my 10-years old laptop I have Nvidia GT425M which runs normally with modern Nvidia 390 drivers included to 18.04 LTS.

Which Nvidia model do you have? What is the output of lspci | grep -i nvidia?

NVIDIA Corporation G86M [GeForce 8400M GS] (rev a1)

I can reproduce the issue on my laptop. The nvidia-340 package does not install.

So I have reported this problem to LaunchPad as https://pad.lv/1918327

I think we need to wait for the fix from Ubuntu and/or Nvidia developers. There is nothing to do on Ubuntu MATE here.

Thank you!

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compile patch for 5.10 kernel

There may be hope yet!