** Summary changed:

- Intel integrated graphics will only boot in low graphics mode
+ SNA enabled causes Intel integrated graphics to only boot in low graphics mode

** Description changed:

  After successfully installing 13.04 on my Dell XPS 15z, I restarted the
  laptop, successfully booting into Ubuntu with no issues.
  
  Restarting after that then gives the 'System is running in low graphics
  mode' message.
  
  I get this everytime now. Have re-installed with latest build and same
  issue.
  
  I can only boot in recovery mode
+ 
+ UPDATE: In the ubuntu forums thread
+ (http://ubuntuforums.org/showthread.php?t=2115355), jbicha, recommended
+ the following which fixed (or worked around) the problem
+ 
+ "Perhaps this is a problem with SNA which has been enabled by default
+ for raring.
+ 
+ Add (or edit if it already exists) /etc/X11/xorg.conf and I think this
+ is the code you need:"
+ 
+ Code:
+ 
+ Section "Device"
+    Identifier  "Intel Graphics"
+    Driver      "intel"
+    Option      "AccelMethod"  "uxa"
+ EndSection
+ 
+ 
  
  
  Extra info:
  
  Other dell users seem to be experiencing similar issues:
  http://ubuntuforums.org/showthread.php?t=2115355
  
  I installed and use the parameters mentioned here:
  https://wiki.ubuntu.com/HardwareSupport/Machines/Laptops/Dell/XPS/15z
  
  I have an optimus card, which the Nvidia card should be disabled as it
  does not work
  
  Sometimes when booting in recovery mode it says there are errors on the
  drive and would I like to fix them, I agree and it fixes them
  
  ProblemType: Bug
  DistroRelease: Ubuntu 13.04
  Package: xorg 1:7.7+1ubuntu4
  ProcVersionSignature: Ubuntu 3.8.0-6.11-generic 3.8.0-rc7
  Uname: Linux 3.8.0-6-generic x86_64
  .tmp.unity.support.test.1:
-  
+ 
  ApportVersion: 2.8-0ubuntu4
  Architecture: amd64
  CompizPlugins: No value set for 
`/apps/compiz-1/general/screen0/options/active_plugins'
  CompositorRunning: compiz
  Date: Wed Feb 13 23:45:48 2013
  DistUpgraded: Fresh install
  DistroCodename: raring
  DistroVariant: ubuntu
  ExtraDebuggingInterest: Yes, including running git bisection searches
  GraphicsCard:
-  Intel Corporation 2nd Generation Core Processor Family Integrated Graphics 
Controller [8086:0126] (rev 09) (prog-if 00 [VGA controller])
-    Subsystem: Dell Device [1028:0446]
-  NVIDIA Corporation GF108 [GeForce GT 540M] [10de:0df5] (rev a1) (prog-if 00 
[VGA controller])
-    Subsystem: Dell Device [1028:0446]
+  Intel Corporation 2nd Generation Core Processor Family Integrated Graphics 
Controller [8086:0126] (rev 09) (prog-if 00 [VGA controller])
+    Subsystem: Dell Device [1028:0446]
+  NVIDIA Corporation GF108 [GeForce GT 540M] [10de:0df5] (rev a1) (prog-if 00 
[VGA controller])
+    Subsystem: Dell Device [1028:0446]
  InstallationDate: Installed on 2013-02-11 (2 days ago)
  InstallationMedia: Ubuntu 13.04 "Raring Ringtail" - Alpha amd64 (20130210)
  MachineType: Dell Inc. Dell System XPS 15Z
  MarkForUpload: True
  ProcEnviron:
-  LANGUAGE=en_GB:en
-  PATH=(custom, no user)
-  XDG_RUNTIME_DIR=<set>
-  LANG=en_GB.UTF-8
-  SHELL=/bin/bash
+  LANGUAGE=en_GB:en
+  PATH=(custom, no user)
+  XDG_RUNTIME_DIR=<set>
+  LANG=en_GB.UTF-8
+  SHELL=/bin/bash
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.8.0-6-generic 
root=UUID=93acc5a7-d531-4af3-a215-472a7bd065d6 ro recovery nomodeset
  SourcePackage: xorg
  Symptom: display
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 07/27/2011
  dmi.bios.vendor: Dell Inc.
  dmi.bios.version: A04
  dmi.board.name: 060G42
  dmi.board.vendor: Dell Inc.
  dmi.board.version: A00
  dmi.chassis.type: 8
  dmi.chassis.vendor: Dell Inc.
  dmi.chassis.version: 0.1
  dmi.modalias: 
dmi:bvnDellInc.:bvrA04:bd07/27/2011:svnDellInc.:pnDellSystemXPS15Z:pvr:rvnDellInc.:rn060G42:rvrA00:cvnDellInc.:ct8:cvr0.1:
  dmi.product.name: Dell System XPS 15Z
  dmi.sys.vendor: Dell Inc.
  version.compiz: compiz 1:0.9.9~daily13.02.08-0ubuntu1
  version.ia32-libs: ia32-libs N/A
  version.libdrm2: libdrm2 2.4.42-0ubuntu1
  version.libgl1-mesa-dri: libgl1-mesa-dri 9.0.2-0ubuntu1
  version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
  version.libgl1-mesa-glx: libgl1-mesa-glx 9.0.2-0ubuntu1
  version.xserver-xorg-core: xserver-xorg-core 2:1.13.2-0ubuntu2
  version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.7.3-0ubuntu2
  version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.1.0-0ubuntu1
  version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.21.2-0ubuntu1
  version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 
1:1.0.6-0ubuntu2

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https://bugs.launchpad.net/bugs/1124661

Title:
  SNA enabled causes Intel integrated graphics to only boot in low
  graphics mode

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