I had installed NVIDIA Drivers 465.27 on my Ubuntu 20.04 using software updater.
That time, I could not sign the kernel modules via installer as mentioned here, rather I disabled the secure boot option from BIOS and everything worked fine. Drivers are working fine, GPU is detected.
As disabling secure boot might not be a security best practice, I wanted to enable it again but my screen goes blank after booting up. I tried manually signing NVIDIA kernel module in DKMS with the method mentioned in this Ubuntu blog
I can see that my nvidia modules at
/lib/modules/5.8.0-59-generic/updates/dkms/ are signed as I can see the message
Module signature appended~. at the end of hex dump. But still if I enable
Secure Boot option, the screen goes blank after booting. How can I re-enable secure boot in my Ubuntu 20.04? Thank you in advance!