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
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https://bugs.launchpad.net/bugs/1509764
Title:
Machine Check Exception with Broadwell CPU
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