I initially successfully installed Debian some time ago on my Thinkpad X13s using (a previous version of) the linaro instructions at https://docs.google.com/document/d/1WuxE-42ZeOkKAft5FuUk6C2fonkQ8sqNZ56ZmZ49hGI
This installed kernel 6.0.0-rc3-custom. Today I decided to upgrade a bit, so I added the OpenSuSE-hosted linaro sid repo (as per the new version of the instructions...) deb https://download.opensuse.org/repositories/home:/ndec/Debian_Unstable/ removed the old "people.linaro.org" repo which had been removed, and I also installed the contents of https://people.linaro.org/~manivannan.sadhasivam/x13s_upgrade/ which in particular added a slightly different repository deb https://download.opensuse.org/repositories/isv:/linaro:/sid/Debian_Unstable ./ and added sections non-free non-free-firmware to my debian.org sources.list line. I upgraded "the minimum amount of stuff" and rebooted into the 6.2.0 kernel from https://people.linaro.org/~manivannan.sadhasivam/x13s_upgrade/ it worked. I then upgraded "everything". Now the system won't boot anymore :-( not with the 6.2.0 kernel and not with the 6.0.0-rc3-custom kernel. It goes into grub alright, but after Grub it displays (having removed the "quiet" parameter from the Linux boot line): EFI stub: Booting Linux kernel... EFI stub: Using DTB from configuration table EFI stub: Exiting boot services... and then reboots; I get a black screen, then the red Lenovo logo with "press enter to interrupt normal boot" (I don't press enter) then grub again. Anyone has a clue how I can debug this? This is my first EFI machine, my first upgrade from my now becoming rather ancient amd64 architecture BIOS machines, so I'm a bit clueless as to the exact boot process. I admit that on the pure Debian side I'm using mostly testing, having given bookworm higher priority than sid. But the Linaro repos are at the same priority than bookworm (not lower priority like sid), so anything in there should have overridden the pure Debian stuff just has well as if I had not mucked with apt pinning. I gave sid's kernel (src:linux-signed) and firmware (src:firmare-free and src:firmware-nonfree) packages the same priority as bookworm and linaro, but that should also not have made any trouble as far as I understand. Thanks in advance, Lionel
