I had the same issue with 20.04 on a Thinkpad X220. I managed to resolve it by installing the HWE kernel, adding a dedicated swap partition on another drive, purging ZRAM, and rebuilding my `initrd`.
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1743798 Title: Kernel sometimes panics during early boot if CPU microcode archive prepended to initramfs To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux-hwe/+bug/1743798/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
