Indeed, I have had a dual-socket EPYC Zen4 machine (gigabyte mobo) that ran Ubuntu 24.04 just fine with both the 6.8 kernel and 6.11 HWE kernel. After installing Ubuntu 25.04 GA, it crashes during the bootup (at different points, but never gets to finish the boot). One of the dmesg warnings I managed to capture immediately before the crash was this:
"genirq: Flags mismatch ira 0. 00000000 (0000:06:00.1) vs. 00215a00 (timer)" I do know that I have one faulty (Samsung 980 PRO) nvme SSD that occasionally produces correctable PCIe AER evnets, but keeps working ok. I did disable AER and ACS in the BIOS and additionally set both pci=noaer and pci_aspm=off at the boot time, but still ended up with the same crash. For now I just installed the Oracle Linux 9 (with latest UEK8 kernel that's Linux 6.12) and it works ok, no hardware errors logged in dmesg or ras-daemon-ctl MCE logs either. Also, the beta version of Ubuntu 25.04 (don't remember from how many weeks ago) worked ok too. Edit: I may have used the boot-time GRUB v2 settings wrong. First I set the parameters mentioned above (including mce=off) as "set param=value" on the grub boot-time command line and maybe that didn't work. When I booted up from the Ubuntu 25.04 GA installer USB disk and added these 3 parameters after the "linux /casper/vmlinuz" (but before the "---") then the installer booted up OK. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2106553 Title: Epyc Genoa system unable to boot starting with Kernel 6.14.0 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2106553/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
