← Back to team overview

kernel-packages team mailing list archive

[Bug 1509764] Re: Machine Check Exception with Broadwell CPU

 

** Attachment added: "/proc/cpuinfo"
   https://bugs.launchpad.net/ubuntu/+source/linux-firmware/+bug/1509764/+attachment/4504496/+files/cpuinfo

-- 
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux-firmware in Ubuntu.
https://bugs.launchpad.net/bugs/1509764

Title:
  Machine Check Exception with Broadwell CPU

Status in linux-firmware package in Ubuntu:
  New

Bug description:
  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.

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux-firmware/+bug/1509764/+subscriptions


References