I was running a dual boot system with Windows 10 (2019 May version) and Ubuntu 19.04. Both systems are UEFI secure booted. In Ubuntu 19.04, all drivers except Nvidia GPU were installed with those came with 19.04 installation package. The Nvidia GPU driver was separately downloaded from PPA and signed by MOK.
Yesterday I upgraded Ubuntu 19.04 to 19.10 by
update-manager -d. After automatically reboot, I found I cannot normally boot into Ubuntu from Grub. It stuck at a purple screen, with a black box printed:
UEFI Stub: Secure boot enabled.
What I tried:
1. From advanced options in Grub, I found Ubuntu 19.10 cannot be booted using kernel 5.3 but was bootable using kernel 5.0.0-32.
2. I tried to add
nomodeset to grub options but still stuck at the purple screen when normal boot.
3. I tried to disable secure boot from BIOS but still stuck at the purple screen when normal boot.
4. I tried to uninstall Nvidia-driver by booting into kernel 5.0.0-32 and made sure the driver for both kernels 5.3 and 5.0 were removed. But I still stuck at the purple screen when trying to normal boot.
What happened and what should I do to make kernel 5.3 usable? Thanks!
Core X i9-9820X, ASUS Prime X299 Deluxe II, 128GB RAM, Nvidia GTX 1650 + Nvidia Titan RTX, 256GB SSD + 1TB SSD + 4TB HDD + 8TB HDD.