Debian-Installer errata

Errata for Bullseye RC 2

This is a list of known problems in the Bullseye RC 2 release of the Debian Installer. If you do not see your problem listed here, please send us an installation report describing the problem.

Broken rescue mode with the graphical installer
It was discovered during Bullseye RC 1 image testing that the rescue mode seems broken (#987377). Additionally, the “Rescue” label in the banner needs to be adjusted for the Bullseye theme.
Status: Fixed in Bullseye RC 2.
amdgpu firmware required for many AMD graphic cards
There seems to be a growing need to install amdgpu firmware (through the non-free firmware-amd-graphics package) to avoid a black screen when booting the installed system. As of Bullseye RC 1, even when using an installation image that includes all firmware packages, the installer doesn't detect the need for that specific component. See the umbrella bug report to keep track of our efforts.
Status: Being investigated, to be fixed before the first official Bullseye release.
GNOME may fail to start with some virtual machine setups
It was noticed during Stretch Alpha 4 image testing that GNOME might fail to start depending on the setup used for virtual machines. It seems using cirrus as an emulated video chip is fine.
Status: Being investigated.
Desktop installations may not work using CD#1 alone
Due to space constraints on the first CD, not all of the expected GNOME desktop packages fit on CD#1. For a successful installation, use extra package sources (e.g. a second CD or a network mirror) or use a DVD instead.
Status: It is unlikely more efforts can be made to fit more packages on CD#1.
LUKS2 is incompatible with GRUB's cryptodisk support
It was only lately discovered that GRUB has no support for LUKS2. This means that users who want to use GRUB_ENABLE_CRYPTODISK and avoid a separate, unencrypted /boot, won't be able to do so (#927165). This setup isn't supported in the installer anyway, but it would make sense to at least document this limitation more prominently, and to have at least the possibility to opt for LUKS1 during the installation process.
Status: Some ideas have been expressed on the bug; cryptsetup maintainers have written some specific documentation.