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[Mikael Thurberg <1351479@xxxxxxxxxxxxxxxxxx>]

Also I can add that it did not stopped working directly after upgrading
to 14.04 (from 13.10 I think), it did stopped working logged in/starting
the graphics/windows enviroment a short time afterwards if that
information would be of any help..?

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https://bugs.launchpad.net/bugs/1351479

Title:
  Purple screen flicker on black screen when starting Ubuntu 14.04 with
  amd radeon 6450 gfx card

Status in “xorg” package in Ubuntu:
  New

Bug description:
  Hi there!

  I cant start Ubunutu 14.04..

  During the upstart I see the usual ubuntu loading screen (the one with
  the dots before loading x)..

  
  But I see it with purple flicker and strange "noise patterns" across the screen here and there..

  Then it continues on to the loginscreen in ubuntu but here I dont see
  anything, its black background with the same purple flicker/strange
  noise patterns here and there..

  Some times I can see the cursor displaying on this black/purple
  distortion pattern and I have one purple "square distortion pattern"
  following the cursor when I move it around.. other than that I cant
  see a thing actually so something goes wrong when loading this..

  It all worked a few days ago and then I updated ubuntu and it didnt
  worked.. Maybee it did have something to do with that I changed the
  harddrive with gfx-card to another computer with the same chipset on
  the motherboard (its only a slower cpu) because I was trying a thing
  there and then I changed it back.. if I dont remember wrong it stopped
  working there? Or if it did work and stopped working after doing the
  usual ubuntu updates.. I dont remember to be honest when it did stop
  working..

  Im not that experienced with ubuntu so I dont know what to do from
  here, help would be appriciated!

  You can write what I can try and so I can reply here with the
  results..

  right now its working everything, but I did remove the amd radeon 6450 gfx card and run on the motherboards integrated gfx-chip..
  then it loaded as usual so I suspect its something with the amd driver somehow.. but still I have no clue how to fix this.. Ive tried to run in failsafe-x mode at the grub start but with no sucess.. then its only dark with a blinking cursor up in the corner but with nothing else.. not with the purple distortion patterns anyway when I run that mode.. but nothing is loading as said..

  I have changed the hd with ubuntu from another computer back and
  forth, both motherboards have the same chip, one comupter have a
  sligthly more power cpu, the other dont, Ive changed the gfx card also
  from one computer to the other.. It worked at first doing this with no
  errors but now suddently it doesnt work on the new motherboard/cpu..

  Thankful for help anyway!
  /Micke

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: xorg 1:7.7+1ubuntu8
  ProcVersionSignature: Ubuntu 3.13.0-32.57-generic 3.13.11.4
  Uname: Linux 3.13.0-32-generic i686
  .tmp.unity.support.test.0:
   
  ApportVersion: 2.14.1-0ubuntu3.2
  Architecture: i386
  CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins'
  CompositorRunning: kwin
  Date: Fri Aug  1 22:45:01 2014
  DistUpgraded: 2014-07-30 23:07:00,955 DEBUG enabling apt cron job
  DistroCodename: trusty
  DistroVariant: ubuntu
  DkmsStatus:
   fglrx-updates, 13.350.1, 3.11.0-26-generic, i686: installed
   fglrx-updates, 13.350.1, 3.13.0-32-generic, i686: installed
  ExtraDebuggingInterest: Yes, if not too technical
  GraphicsCard:
   Intel Corporation 82945G/GZ Integrated Graphics Controller [8086:2772] (rev 02) (prog-if 00 [VGA controller])
     Subsystem: Dell Device [1028:01ad]
     Subsystem: Dell Device [1028:01ad]
  InstallationDate: Installed on 2011-07-11 (1116 days ago)
  InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Release i386 (20110427.1)
  MachineType: Dell Inc. OptiPlex GX620
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-32-generic root=UUID=aef7709e-7bbe-4499-bb59-2ec02f80afb3 ro quiet splash vt.handoff=7
  SourcePackage: xorg
  UpgradeStatus: Upgraded to trusty on 2014-07-30 (1 days ago)
  dmi.bios.date: 11/30/2006
  dmi.bios.vendor: Dell Inc.
  dmi.bios.version: A11
  dmi.board.name: 0FH884
  dmi.board.vendor: Dell Inc.
  dmi.chassis.type: 3
  dmi.chassis.vendor: Dell Inc.
  dmi.modalias: dmi:bvnDellInc.:bvrA11:bd11/30/2006:svnDellInc.:pnOptiPlexGX620:pvr:rvnDellInc.:rn0FH884:rvr:cvnDellInc.:ct3:cvr:
  dmi.product.name: OptiPlex GX620
  dmi.sys.vendor: Dell Inc.
  version.compiz: compiz 1:0.9.11.2+14.04.20140714-0ubuntu1
  version.libdrm2: libdrm2 2.4.52-1
  version.libgl1-mesa-dri: libgl1-mesa-dri 10.1.3-0ubuntu0.1
  version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
  version.libgl1-mesa-glx: libgl1-mesa-glx 10.1.3-0ubuntu0.1
  version.xserver-xorg-core: xserver-xorg-core 2:1.15.1-0ubuntu2
  version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.8.2-1ubuntu2
  version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.3.0-1ubuntu3.1
  version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.910-0ubuntu1
  version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.10-1ubuntu2
  xserver.bootTime: Fri Aug  1 22:37:41 2014
  xserver.configfile: default
  xserver.errors: [dix] Logitech Gaming Mouse G600: unable to find touch point 0
  xserver.logfile: /var/log/Xorg.0.log
  xserver.outputs:
   product id                               12292 
   vendor                                     DEL
  xserver.version: 2:1.15.1-0ubuntu2

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