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[Heineken <1503927@xxxxxxxxxxxxxxxxxx>]

*** This bug is a duplicate of bug 1503655 ***
    https://bugs.launchpad.net/bugs/1503655

This bug is a duplicate of bug #1503655. The issue has been identified
in several kernel versions, and a fix has been uploaded. In the
meantime, I've a test kernel that can be used to confirm if this is
*really* the same bug.

People running Trusty (3.13 kernel) can try: http://people.canonical.com/~henrix/lp1503655/t/amd64/
People running Vivid (3.19 kernel) can try: http://people.canonical.com/~henrix/lp1503655/v/amd64/

** This bug has been marked a duplicate of bug 1503655
   Kernel bug in eventpoll_release_file+0x46/0xa0 with 3.13.0-66.107

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https://bugs.launchpad.net/bugs/1503927

Title:
  System Freeze with Kernel 3.19.0 after graphics startup (radeon)

Status in linux-signed package in Ubuntu:
  New

Bug description:
  The first restart after Kernel upgrade to 3.19.0-31 this morning, the
  computer freezes when showing the graphical login-screen. Num-lock key
  is non-responsive, hard reset is required. System is equipped with
  Cypress XT [Radeon HD 5870] and runs the open source radeon driver.

  Sometimes only  a black screen is shown and the system freezes,
  sometime the Scroll-lock and Caps-lock keys are blinking (kernel-
  panik).

  Starting the system with kernel version 3.16.0-36, it's rock-solid.

  ProblemType: Bug
  DistroRelease: Ubuntu 15.04
  Package: linux-signed-image-3.19.0-30-generic (not installed)
  ProcVersionSignature: Ubuntu 3.16.0-36.48-generic 3.16.7-ckt9
  Uname: Linux 3.16.0-36-generic x86_64
  ApportVersion: 2.17.2-0ubuntu1.5
  Architecture: amd64
  CurrentDesktop: Unity
  Date: Thu Oct  8 09:28:08 2015
  InstallationDate: Installed on 2015-01-28 (252 days ago)
  InstallationMedia: Ubuntu 14.10 "Utopic Unicorn" - Release amd64 (20141022.1)
  SourcePackage: linux-signed
  UpgradeStatus: No upgrade log present (probably fresh install)

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