← Back to team overview

kernel-packages team mailing list archive

[Bug 1488719] Re: dmesg shows "[drm:gen8_irq_handler [i915]] *ERROR* The master control interrupt lied (SDE)!"


I'm still not sure what we're looking at here, especially if the
original message this bug deals with has anything to do with the other
described buggy behaviour here, which are: random freezes, display
flickering, not working external displays etc. I watched the development
of the comments in this bug really closely (not at least because of my
own interests being affected as well) and there hasn't been any real
progress in investigating this issue(s) further. I think this is not
least caused by the complexity and variatons of issues regarding

IMHO this leads to three taks which has to be done:

1. Identifiying distinct issues and filing distinct bug reports while
being aware of possible duplicates.

2. If you're affected and feeling confident in providing more
information, investigate those distinct issues further  and provide
proper amounts of logs/traces etc. possbile related to those distinct

3. Pushing those issues to the proper upstream bugtrackes. (For me this
is one of the hardest parts, since I'm not sure which parts play a role
here, e.g. kernel, display manager etc.) When I look at my own logs
(attached) my issue still looks like a kernel problem.

I've tested the 4.5RC7, the origial message is gone, but my external display (connected to DP of my advanced lenovo dock) stays black if the T450s is docked while booting. If I undock after boot and then dock it again, the system freezes totally and syslog is showing some serious kernel issues. The only way to cirumvent this behaviour is to boot undocked and then dock when the system is fully booted. I'm currently using this workaround in my daily work to see if there are other issues. I think I will file a bug report on bugs.freedesktop.org later.

** Attachment added: "Syslog portion from plugging to dock until crash"

You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.

  dmesg shows "[drm:gen8_irq_handler [i915]] *ERROR* The master control
  interrupt lied (SDE)!"

Status in Linux:
  Fix Released
Status in linux package in Ubuntu:

Bug description:
  On a recent intel NUC using i915 graphics, I get the following errors
  in dmesg:

  [drm:gen8_irq_handler [i915]] *ERROR* The master control interrupt
  lied (SDE)!

  There are two monitors connected to this box, one with mini-
  HDMI->HDMI, one with mini-DP->HDMI cable.

  Maybe related:


  ProblemType: Bug
  DistroRelease: Ubuntu 15.04
  Package: linux-image-generic
  ProcVersionSignature: Ubuntu 3.19.0-26.28-generic 3.19.8-ckt4
  Uname: Linux 3.19.0-26-generic x86_64
  ApportVersion: 2.17.2-0ubuntu1.3
  Architecture: amd64
  Date: Wed Aug 26 10:07:31 2015
  InstallationDate: Installed on 2015-08-01 (24 days ago)
  InstallationMedia: Ubuntu 15.04 "Vivid Vervet" - Release amd64 (20150422)
  ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.19.0-26-generic.efi.signed root=/dev/mapper/ubuntu--vg-root ro quiet splash vt.handoff=7
  SourcePackage: linux
  UdevLog: Error: [Errno 2] No such file or directory: '/var/log/udev'
  UpgradeStatus: No upgrade log present (probably fresh install)

To manage notifications about this bug go to: