I can confirm this issue persists in Focal as well. I've run into the issue described at https://askubuntu.com/questions/1229910/ubuntu-20-04 -black-screen-after-installing-no-booting on Dell PowerEdge R640 series with Matrox G200 graphics and in UEFI boot mode.
The suggested fix (remove quiet splash boot flags) works, and I've attempted to preseed this using the following line: grub-pc grub2/linux_cmdline_default string This works for the first boot after installation, and I can confirm the setting with debconf-get-selections. Unfortunately /etc/default/grub still contains the quiet splash options, so the next time update-grub is called (e.g. kernel update) the box will fail to come up on boot unless that file is manually edited first. Ideally the grub-pc grub2/linux_cmdline_default option would ensure that /etc/default/grub is set correctly so there is no unexpected reboot failure after a kernel update. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/581796 Title: grub-installer ignores grub2/linux_cmdline_default in preseed To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/grub-installer/+bug/581796/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
