Public bug reported: My system freezes and reboots 30 seconds later. This happens at random times between shortly after boot or up to three ours after boot. My CPU is a Core i5 5675C. I think it is the same problem discussed here https://bugzilla.kernel.org/show_bug.cgi?id=103351 They have a microcode update as a fix there. All Broadwell CPUs seem to be affected. It does not happen with Fedora 22. There are two workarounds that help for some people: 1. boot with "processor.max_cstate=0 intel_idle.max_cstate=0 idle=poll" 2. Disable speedstep in the bios Both don't work for me.
** Affects: linux-firmware (Ubuntu) Importance: Undecided Status: New ** Attachment added: "/var/log/mcelog" https://bugs.launchpad.net/bugs/1509764/+attachment/4504495/+files/mcelog -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1509764 Title: Machine Check Exception with Broadwell CPU To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux-firmware/+bug/1509764/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs