On do-release-upgrade to Impish with the 5.13 kernel the boot messages stop scrolling at:
fb0: switching to amdgpudrmfb from EFI VGA
This happens on a Lenovo E15G2 with AMD Renoir graphics.
The system may be continuing to boot but the screen stops updating.
The 5.11 and 5.12 kernels both boot correctly.
Turns out this is a kernel panic described here:
to do with the Elantech driver. In that thread Chris Chiu states "It should be caused by the kbuild flag
-fcf-protection=none and this will not be applied for the UBUNTU release image."
I tried the kernel he compiled, presumably without that flag:
and it works.
Anyone know if/when this will be addressed for new kernels in Impish? I am not really thrilled about relearning how to compile a kernel myself.