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[Oliver Woodford <o.j.woodford.98@xxxxxxxxxx>]

Before I remove the mainline kernel, the output of "uname -a" in a terminal is:
3.19.0-031900rc2-generic #201412290135 SMP Mon Dec 29 01:36:54 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux
I confirmed that the vga output doesn't work when the cable is hot plugged, but does when the cable is inserted prior to booting. I.e. the behaviour is identical to previous kernels.

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https://bugs.launchpad.net/bugs/1364292

Title:
  [Toshiba Portégé R600-10Q] VGA output doesn't work with Intel GM45
  chipset

Status in xorg package in Ubuntu:
  Confirmed

Bug description:
  I have just installed Ubuntu 14.04 64-bit on my Toshiba Portege
  R600-10Q laptop (a model from 2009). I am now trying to display the
  desktop on a BenQ Senseye3 22" monitor, via the vga output, but it's
  not working - the monitor says "No Signal Detected!".

  What I've done:
  I have gone into "Screen Display", where I can see the monitor is detected by the laptop.
  The monitor has a 1920 x 1080 native resolution, which I have tried to use, but I have also set it to lower resolutions, e.g. 1024 x 576.
  I have tried to use the monitor in dual screen, mirrored and single screen mode - none work.
  I have tried pressing Fn + F5 to get single screen output - the laptop screen goes blank, but still no output on the monitor.
  I have tried several monitors (of the same type, and also of a different make), so I don't think it's that.

  If I plug the vga cable in after boot up, then the monitor receives no
  signal.

  WORKAROUND: If, and only if, the monitor was plugged in to the PC's
  VGA output during boot up, then the display outputs to the monitor
  correctly.

  The laptop has the Intel® GS45 Express chipset for graphics acceleration. I installed mesa-utils and ran glxinfo in a terminal. Amongst the output was:
  OpenGL renderer string: Mesa DRI Mobile Intel® GM45 Express Chipset

  Also, in the "About This Computer" window I see:
  Graphics: Mobile Intel® GM45 Express Chipset

  I wonder if the problem is that my chipset is GS45 not GM45.

  The output of "sudo lshw -C video" is:
  *-display:0
  description: VGA compatible controller
  product: Mobile 4 Series Chipset Integrated Graphics Controller
  vendor: Intel Corporation
  physical id: 2
  bus info: pci@0000:00:02.0
  version: 07
  width: 64 bits
  clock: 33MHz
  capabilities: msi pm vga_controller bus_master cap_list rom
  configuration: driver=i915 latency=0
  resources: irq:44 memory:ff400000-ff7fffff memory:e0000000-efffffff ioport:cff8(size=8)
  *-display:1 UNCLAIMED
  description: Display controller
  product: Mobile 4 Series Chipset Integrated Graphics Controller
  vendor: Intel Corporation
  physical id: 2.1
  bus info: pci@0000:00:02.1
  version: 07
  width: 64 bits
  clock: 33MHz
  capabilities: pm bus_master cap_list
  configuration: latency=0
  resources: memory:ffc00000-ffcfffff

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: xorg 1:7.7+1ubuntu8
  ProcVersionSignature: Ubuntu 3.13.0-35.62-generic 3.13.11.6
  Uname: Linux 3.13.0-35-generic x86_64
  .tmp.unity.support.test.0:

  ApportVersion: 2.14.1-0ubuntu3.3
  Architecture: amd64
  CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins'
  CompositorRunning: compiz
  CompositorUnredirectDriverBlacklist: '(nouveau|Intel).*Mesa 8.0'
  CompositorUnredirectFSW: true
  CurrentDesktop: Unity
  Date: Tue Sep  2 10:00:57 2014
  DistUpgraded: Fresh install
  DistroCodename: trusty
  DistroVariant: ubuntu
  EcryptfsInUse: Yes
  ExtraDebuggingInterest: Yes, if not too technical
  GraphicsCard:
   Intel Corporation Mobile 4 Series Chipset Integrated Graphics Controller [8086:2a42] (rev 07) (prog-if 00 [VGA controller])
     Subsystem: Toshiba America Info Systems Device [1179:000c]
     Subsystem: Toshiba America Info Systems Device [1179:000c]
  InstallationDate: Installed on 2014-08-28 (4 days ago)
  InstallationMedia: Ubuntu 14.04.1 LTS "Trusty Tahr" - Release amd64 (20140722.2)
  MachineType: TOSHIBA PORTEGE R600
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-35-generic root=UUID=fe977943-4013-472e-b627-f7184c9e190f ro quiet splash vt.handoff=7
  SourcePackage: xorg
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 11/27/2008
  dmi.bios.vendor: TOSHIBA
  dmi.bios.version: Version 1.60
  dmi.board.asset.tag: 0000000000
  dmi.board.name: Portable PC
  dmi.board.vendor: TOSHIBA
  dmi.board.version: Version A0
  dmi.chassis.asset.tag: 0000000000
  dmi.chassis.type: 10
  dmi.chassis.vendor: TOSHIBA
  dmi.chassis.version: Version 1.0
  dmi.modalias: dmi:bvnTOSHIBA:bvrVersion1.60:bd11/27/2008:svnTOSHIBA:pnPORTEGER600:pvrPPR61E-00Q00CEN:rvnTOSHIBA:rnPortablePC:rvrVersionA0:cvnTOSHIBA:ct10:cvrVersion1.0:
  dmi.product.name: PORTEGE R600
  dmi.product.version: PPR61E-00Q00CEN
  dmi.sys.vendor: TOSHIBA
  version.compiz: compiz 1:0.9.11.2+14.04.20140714-0ubuntu1
  version.ia32-libs: ia32-libs N/A
  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: Sun Aug 31 11:29:04 2014
  xserver.configfile: default
  xserver.errors:

  xserver.logfile: /var/log/Xorg.0.log
  xserver.outputs:

  xserver.version: 2:1.15.1-0ubuntu2

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