This is to confirm manually downgrading the grub packages to those found in 19.04 fixes the problem. This is with TPM still disabled in the BIOS and dis_ucode_ldr kernel command line flag, but I don't think either of those are contributing to the successful boot.
If you're stuck on this issue, $ sudo dpkg --get-selections | grep ^grub - For each package listed in the output, visit https://packages.ubuntu.com/ and search the 'disco-updates' distribution for the associated package name. - Get the URL: Ensure you selected 'disco-updates' distribution in the search config, do the search, click the single result (link is also "disco-updates"), click "amd64", right-click copy one of the .deb download links - wget each package in turn, for example: $ wget http://mirrors.kernel.org/ubuntu/pool/main/g/grub2/grub2-common_2.02+dfsg1-12ubuntu2.1_amd64.deb - dpkg -i each package in turn, for example: $ sudo dpkg -i grub2-common_2.02+dfsg1-12ubuntu2.1_amd64.deb Some packages depend on each other, so you might have to download e.g. the common package and install it with "dpkg -i" at the same time as the dependent package -- just supply both .debs on the dpkg command line. - Run update-grub and grub-install - Your machine should boot again. - Don't install upgrades from apt until a real fix appears -- they'll upgrade GRUB again. Investigate apt package pinning to keep this configuration permanently (TBD -- I haven't done this yet) -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1853369 Title: [19.10] Boot hangs at "loading initial ramdisk" To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1853369/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
