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[Artemgy <launchpad@xxxxxxxxx>]

** Attachment added: "dmesg.txt"
   https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1407529/+attachment/4292116/+files/dmesg.txt

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https://bugs.launchpad.net/bugs/1407529

Title:
  [Radeon HD 6290] xorg freezes when turning on external monitor

Status in xorg package in Ubuntu:
  New

Bug description:
  == Steps to reproduce ==
  * Insert HDMI cable to external monitor
  * Start Menu / Preferences / Monitor Settings
  * Quick Options / Show the same screen on both laptop LCD and external monitor

  X will freeze immediately, mouse is blocked, CTRL-ALT-F1 does not
  respond, only direct hardware function keys (like screen brightness /
  disable wifi) respond

  == Test cases ==
  Systems FAILS with this issue following a system update - regressing to previous kernel the system WORKS as expected, installing mainline kernel the system WORKS as before... 

  $ cat /proc/version
  FAILS Linux version 3.16.0-28-generic (buildd@komainu) (gcc version 4.9.1 (Ubuntu 4.9.1-16ubuntu6) ) #38-Ubuntu SMP Fri Dec 12 17:37:40 UTC 2014
  WORKS Linux version 3.16.0-25-generic (buildd@komainu) (gcc version 4.9.1 (Ubuntu 4.9.1-16ubuntu6) ) #33-Ubuntu SMP Tue Nov 4 12:06:54 UTC 2014
  WORKS Linux version 3.19.0-031900rc2-generic (apw@tangerine) (gcc version 4.6.3 (Ubuntu/Linaro 4.6.3-1ubuntu5) ) #201412290135 SMP Mon Dec 29 01:36:54 UTC 2014

  $ lsb_release -rd
  Description:	Ubuntu 14.10
  Release:	14.10

  == diagnostic attached ==

  $ sudo lshw -C video > lshw_video.txt

  ProblemType: Bug
  DistroRelease: Ubuntu 14.10
  Package: xorg 1:7.7+7ubuntu2
  ProcVersionSignature: Ubuntu 3.16.0-28.38-generic 3.16.7-ckt1
  Uname: Linux 3.16.0-28-generic x86_64
  ApportVersion: 2.14.7-0ubuntu8
  Architecture: amd64
  Date: Mon Jan  5 01:04:17 2015
  EcryptfsInUse: Yes
  InstallationDate: Installed on 2014-10-16 (80 days ago)
  InstallationMedia: Lubuntu 14.10 "Utopic Unicorn" - Alpha amd64 (20141016)
  ProcEnviron:
   TERM=xterm
   SHELL=/bin/bash
   PATH=(custom, user)
   LANG=en_GB.UTF-8
  SourcePackage: xorg
  UpgradeStatus: No upgrade log present (probably fresh install)

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