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[Alan Fry <alan.fry@xxxxxxxxxxxxxx>]

Just to add my findings to this, the i915 fault also appears on a
Ubuntu-Mate install but apparently recovers from it to log-in and run
correctly.

Fully working boot using 3.13.0-34.60 kernel, otherwise fully updated Ubuntu Utopic
alan@alan-ubuntu:~$ grep -i i915 /var/log/dmesg
[    4.188060] i915 0000:00:02.0: irq 46 for MSI/MSI-X
[    5.535026] i915 0000:00:02.0: fb0: inteldrmfb frame buffer device
[    5.535027] i915 0000:00:02.0: registered panic notifier
[    5.558936] [drm] Initialized i915 1.6.0 20080730 for 0000:00:02.0 on minor 0
(Conclusion - No i915 failure with old, non current kernel)

alan@alan-ubuntu:~$ 
Failed boot on same install using 3.16.0-11.16 kernel
[    4.435951] i915 0000:00:02.0: irq 48 for MSI/MSI-X
[    4.587670] [drm:i915_gem_init] *ERROR* Failed to initialize GPU, declaring it wedged
[    4.739567] i915 0000:00:02.0: fb0: inteldrmfb frame buffer device
[    4.739569] i915 0000:00:02.0: registered panic notifier
[    4.794288] [drm] Initialized i915 1.6.0 20080730 for 0000:00:02.0 on minor 0
(Conclusion - i915 failure with current kernel. Boot fails to 'wallpaper only' after login.)

Working boot on Ubuntu-Mate install, same machine, using 3.16.0-11.16 kernel
alan@Ubuntu-Mate:~$ grep -i i915 /var/log/dmesg
[    7.964054] i915 0000:00:02.0: irq 47 for MSI/MSI-X
[    8.112029] [drm:i915_gem_init] *ERROR* Failed to initialize GPU, declaring it wedged
[    9.350789] i915 0000:00:02.0: fb0: inteldrmfb frame buffer device
[    9.350790] i915 0000:00:02.0: registered panic notifier
[    9.394907] [drm] Initialized i915 1.6.0 20080730 for 0000:00:02.0 on minor 0
alan@Ubuntu-Mate:~$
(Conclusion - i915 failure with current kernel but system apparently recovers to work normally)

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https://bugs.launchpad.net/bugs/1359299

Title:
  utopic 3.16.0-9 iso boots to desktop no unity

Status in Unity:
  Confirmed
Status in “linux” package in Ubuntu:
  Incomplete
Status in “unity” package in Ubuntu:
  Confirmed

Bug description:
  Intel Core 2 Duo 3 gHz 4 gb Lenovo Think Centre.
  Boots 3.16.0-6 amd64 fine, runs compiz 3D fine.  

  Today's amd64 iso download, 20 August, boots to desktop & cursor.  
  No unity.
  Did ubuntu-bug from command line on the booted iso, saved report.

  Booted 3.10.0-6 and ran ubuntu-bug apport on the saved file.

  Planet Ubuntu asked for results on 3.16.0-9 so this is my result.

  ProblemType: Bug
  DistroRelease: Ubuntu 14.10
  Package: linux-image-3.16.0-9-generic 3.16.0-9.14
  ProcVersionSignature: Ubuntu 3.16.0-9.14-generic 3.16.1
  Uname: Linux 3.16.0-9-generic x86_64
  ApportVersion: 2.14.6-0ubuntu2
  Architecture: amd64
  CasperVersion: 1.341
  Date: Wed Aug 20 16:57:57 2014
  LiveMediaBuild: Ubuntu 14.10 "Utopic Unicorn" - Alpha amd64 (20140820)
  ProcEnviron:
   TERM=linux
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  ProcKernelCmdLine: BOOT_IMAGE=(loop)/casper/vmlinuz.efi boot=casper iso-scan/filename=/utopic-desktop-amd64.iso noprompt noeject
  SourcePackage: linux
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 01/10/2011
  dmi.bios.vendor: LENOVO
  dmi.bios.version: 5CKT69AUS
  dmi.board.name: LENOVO
  dmi.chassis.vendor: LENOVO
  dmi.chassis.version: NONE
  dmi.modalias: dmi:bvnLENOVO:bvr5CKT69AUS:bd01/10/2011:svnLENOVO:pn6234A1U:pvrThinkCentreM58p:rvnLENOVO:rnLENOVO:rvrNONE:cvnLENOVO:ct3:cvrNONE:
  dmi.product.name: 6234A1U
  dmi.product.version: ThinkCentre M58p
  dmi.sys.vendor: LENOVO

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