So the bug is confirmed. It appears to fixed by compiling the kernel without the kbuild flag `-fcf-protection=none` .
-- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1945531 Title: screen freezes at boot Status in Ubuntu MATE: New Status in linux package in Ubuntu: Incomplete Bug description: On do-release-upgrade to Impish with the 5.13 kernel the boot messages stop scrolling at: fb0: switching to amdgpudrmfb from EFI VGA The system may be continuing to boot but the screen stops updating. The 5.11 and 5.12 kernels both boot correctly. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-mate/+bug/1945531/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp