Hi Petar, Thanks for providing the files.
The original issue, boot failure, seems to be a conflict between the 5.4 kernel and the intel-microcode blob, since the same blob works fine in the 4.15 kernel. (For the printout alignment issue, let's track that on another bug report.) Let's try to bisect when this microcode/kernel conflict started. Could you please test with: 1) the 5.4.0-26 kernel from focal-release? $ sudo apt install linux-image-5.4.0-26-generic (you might also need linux-modules-extra-5.4.0-26-generic and/or linux- headers-5.4.0-26-generic depending on your hardware; please check if those are installed with 'dpkg -l | grep linux-modules-extra' and similarly for headers) 2) the 5.3.0-67 kernel from bionic? (current HWE kernel) $ echo 'deb http://archive.ubuntu.com/ubuntu bionic-updates main restricted' | sudo tee /etc/apt/sources.list.d/bionic.list $ sudo apt update $ sudo apt install linux-image-5.3.0-67-generic # same observation for modules-extra and headers. $ sudo rm /etc/apt/sources.list.d/bionic.list Please confirm whether or not these kernels can boot without dis_ucode_ldr. Thanks, Mauricio -- 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/1895458 Title: Computer freezes on kernel 5, works on kernel 4 Status in linux package in Ubuntu: Confirmed Bug description: The computer works with kernel Ubuntu 4.15.0-112.113-generic 4.15.18. If I update to linux-image-5.4.0-47-generic 5.4.0-47.51 - it freezes. I tried the procedure "https://wiki.ubuntu.com/DebuggingKernelBoot"; it freezes after Ctrl+x To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1895458/+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
