This is happening because the mainline kernels started getting built
with CONFIG_UBSAN=y.
Apparently, turning this on at build time inserts code at various points
that helps identify undefined behaviour, and even though the runtime
reporter is not on, the inserted code breaks the nvidia driver.
If you build your own kernel without the option, things work fine.
** Changed in: nvidia-graphics-drivers-470 (Ubuntu)
Status: New => Confirmed
** Summary changed:
- Kubuntu 21.04 Mainline Kernels Fail To Boot Using Nvidia 470.63.01
+ Recent Mainline Kernels with CONFIG_UBSAN=y Fail To Boot Using Nvidia
470.63.01
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https://bugs.launchpad.net/bugs/1943104
Title:
Recent Mainline Kernels with CONFIG_UBSAN=y Fail To Boot Using Nvidia
470.63.01
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