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I'm recompiling kernel testing performance and other stuff, in general all is going well except for the nvidia driver, sometimes I modify the kernel just a little, like adding or removing drivers for webcam support and then I go and re-install kernel and modules again, and whenever I do that I need to rebuilt the nvidia module, and reinstall all the libraries for X and OpenGL and cuda and so on.

Is there a way to avoid this and just re-use the previously compiled nvidia driver, or I have to rebuild the module if the kernel is recompiled ?

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if the new kernel has the same name, see if "disabling module signing in the kernel" CONFIG_MODULE_SIG helps

CONFIG_MODULE_SIG:

Check modules for valid signatures upon load: the signature is simply appended to the module. For more information see Documentation/module-signing.txt.

i also found this, but don't know if it helps :

CONFIG_MODVERSIONS:

Usually, you have to use modules compiled with your kernel. Saying Y here makes it sometimes possible to use modules compiled for different kernels, by adding enough information to the modules to (hopefully) spot any changes which would make them incompatible with the kernel you are running. If unsure, say N.

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  • Thank you for your answer, but I am building the module against the same kernel tree, just different modules selected, so I am not sure ig the second option is related, in any case I will try both and let you know Commented May 27, 2017 at 16:39

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