Summary: After moving from 6.8 to 6.14-28‑generic), the machine consistently crashes very early during boot with a fatal machine check. Reverting to 6.8.0‑71‑generic is stable.
What I see on 6.14-28: – APEI/BERT reports a fatal error from the previous boot; error structure type = cache error, Processor Context Corrupt: true, Uncorrected: true. – MCE line shows CPU xx: Machine Check: 0 Bank 5: aea0000001000108, PROCESSOR 2:a10f11, microcode a101121, APIC 0x25. – Kernel command line included nomodeset (for debugging) and dis_ucode_ldr. The boot also prints “Speculative Return Stack Overflow: Vulnerable: Safe RET, no microcode”. – Early PCI init logs include several “VF BAR … can’t claim; no compatible bridge window” messages for 0000:01:00.1. Good kernel: 6.8.0‑71‑generic boots and runs fine here (same hardware, same userspace). Attachments provided below: full journalctl -b -1 -k, pstore dump (BERT), lspci -nnk, CPU/BIOS info, kernel packages in use, and the exact /proc/cmdline. ** Attachment added: "launchpad-attachments.tar.gz" https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2119636/+attachment/5899375/+files/launchpad-attachments.tar.gz -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2119636 Title: Ubuntu 24.04 fails to boot with kernel 6.14.0-27-generic on ASRock GENOAD8X-2T/BCM – reboots after systemd init To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2119636/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
