Am 16.06.20 um 22:04 schrieb Fabian Arrotin: > On 16/06/2020 15:06, Leon Fauster via CentOS wrote: >> Hi all, >> >> I updated a Dell XPS laptop from CentOS 8.1 (1911) to 8.2 (2004). >> >> Installed kernels are >> kernel-4.18.0-147.5.1.el8_1.x86_64 >> kernel-4.18.0-147.8.1.el8_1.x86_64 >> kernel-4.18.0-193.6.3.el8_2.x86_64 >> >> Unfortunately I can not boot into the latest >> kernel-4.18.0-193.6.3.el8_2.x86_64. >> >> After grub2 screen I only see following line: >> >> EFI stub: UEFI Secure Boot is enabled >> >> Booting into the older kernel is still possible. The >> above line appears and after that the normal kernel >> output scrolls over the screen (rhgb quiet disabled). >> >> Is the new kernel correctly signed? >> >> What can I do? >> >> -- >> Thanks >> Leon > > Hi Leon, > > Don't think that it's due to secureboot, as on my work laptop (thinkpad > t490s), I have secureboot on, and kernel working fine. > > OTOH, on my family laptop (also in secureboot mode), when I updated from > 8.1.1011 to 8.2.2004, laptop became unresponsive during the > microcode_ctl update (in scriptlet) and after that it auto-reset itself > , so in the middle of the whole rpm transaction. > I tried to recover it but it was to a point where it was faster to just > reinstall from scratch with 8.2.2004, which I did ... and in gnome, > everything was fine, etc (adding repo, pkgs) but then on the *same* > kernel it was installed with, just tried a reboot, and nothing : grub > shows menu, you select kernel and on upper left there is only cursor > (fixed) and nothing happens .. > > I'll try to diagnose what's the issue as actually that means troubles > with family using that laptop :) Hi Fabian, an earlyprintk=efi kernel option shows a slowly executed kernel (at least the output). I disabled the early_microcode dracut option and rebuilded the initramfs image but no success in booting the kernel 4.18.0-193.6.3.el8_2.x86_64. Unfortunately no more time for more heuristics ... -- Leon