Comment 22 for bug 1829402

Please consider testing this:

1. Add this to /etc/default/grub :
GRUB_GFXPAYLOAD_LINUX="text"

2. Add this to the GRUB_CMDLINE_LINUX_DEFAULT option in /etc/default/grub :
earlyprintk=efi,keep

3. Run: sudo update-grub

4. Try all of the following combinations of kernel boot parameters by editing them at the grub menu (https://wiki.ubuntu.com/Kernel/KernelBootParameters):
  mitigations=off
  dis_ucode_ldr mitigations=off
  dis_ucode_ldr mds=off
(Only) if any of these combinations boot fine, try them again at least five times or until a boot fails. Take notes and finally report how often you tried them and how often they booted fine, and whether there was a failed boot for each of these combinations.