foogod, this bug was reported a while ago and there hasn't been any
activity in it recently. We were wondering if this is still an issue? If
so, could you please test for this with the latest development release
of Ubuntu? ISO CD images are available from
http://cdimage.ubuntu.com/releases/ .

If it remains an issue, could you please run the following command in
the development release from a Terminal
(Applications->Accessories->Terminal), as it will automatically gather
and attach updated debug information to this report:

apport-collect -p linux <replace-with-bug-number>

Also, could you please test the latest upstream kernel available
following https://wiki.ubuntu.com/KernelMainlineBuilds ? It will allow
additional upstream developers to examine the issue. Please do not test
the kernel in the daily folder, but the one all the way at the bottom.
Once you've tested the upstream kernel, please comment on which kernel
version specifically you tested and remove the 'needs-upstream-testing'
tag. This can be done by clicking on the yellow pencil icon next to the
tag located at the bottom of the bug description and deleting the
'needs-upstream-testing' text.

If this bug is fixed in the mainline kernel, please add the following
tag 'kernel-fixed-upstream-VERSION-NUMBER', where VERSION-NUMBER is the
version number of the kernel you tested.

If the mainline kernel does not fix this bug, please add the tag:
'kernel-bug-exists-upstream-VERSION-NUMBER', where VERSION-NUMBER is the
version number of the kernel you tested.

If you are unable to test the mainline kernel, please comment as to why
specifically you were unable to test it and add the tag: 'kernel-unable-
to-test-upstream'.

Please let us know your results. Thank you for your understanding.

Helpful Bug Reporting Links:
https://help.ubuntu.com/community/ReportingBugs#Bug_Reporting_Etiquette
https://help.ubuntu.com/community/ReportingBugs#A3._Make_sure_the_bug_hasn.27t_already_been_reported
https://help.ubuntu.com/community/ReportingBugs#Adding_Apport_Debug_Information_to_an_Existing_Launchpad_Bug
https://help.ubuntu.com/community/ReportingBugs#Adding_Additional_Attachments_to_an_Existing_Launchpad_Bug

** This bug is no longer a duplicate of bug 906615
   DisplayPort not working properly Dell XPS L501X Ubuntu 64bits

** Tags added: kernel-graphics needs-upstream-testing

** Package changed: xserver-xorg-video-intel (Ubuntu) => linux (Ubuntu)

** Changed in: linux (Ubuntu)
   Importance: Undecided => Medium

** Changed in: linux (Ubuntu)
       Status: New => Incomplete

** Description changed:

  I'm encountering a problem when trying to use my Dell E6400 laptop (i915
  video chipset) with an external DisplayPort monitor (DELL3007WFPHC via
  an Apple DP->DVI active adapter).
  
  It works fine if I boot up with the monitor connected, but if I start
  without it and then plug it in while the X server is running, it
  completely locks up X.  When I remove the monitor, X starts working
  again and I can continue as if nothing had happened.
  
  I have tested things while only running a basic X server/xterm and the
  problem still happens as soon as the monitor is plugged in.  I have
  tested the following scenarios:
  
  X running --> plug-in monitor = freeze
  X running --> plug-in monitor --> (freeze) --> unplug monitor = unfreezes
  X stopped --> plug-in monitor = works (monitor mirrors text console)
  X stopped --> plug-in monitor --> start X = works 
(mirroring/separate/different resolutions/etc all work fine via gnome settings)
  (freeze) --> unplug --> (unfreeze) --> stop X --> plug-in --> start X = works 
(freeze/unfreeze does not appear to have any lasting effects on behavior)
  
- Please let me know if there's any additional info I can provide that
- would be of assistance.
+ WORKAROUND:  I do not encounter the lockup if I connect the monitor to
+ the DisplayPort using a passive DP->DVI (pass-through) adapter, it only
+ seems to occur when using the native DisplayPort output mode
+ (unfortunately, however, the passive DVI adapter cannot support my
+ monitor's full resolution)
  
  ProblemType: Bug
  DistroRelease: Ubuntu 11.10
  Package: xorg 1:7.6+7ubuntu7
  ProcVersionSignature: Ubuntu 3.0.0-14.23-generic 3.0.9
  Uname: Linux 3.0.0-14-generic i686
  NonfreeKernelModules: wl
  .tmp.unity.support.test.0:
-  
+ 
  ApportVersion: 1.23-0ubuntu4
  Architecture: i386
  CompizPlugins: 
[core,bailer,detection,composite,opengl,decor,imgpng,snap,move,compiztoolbox,resize,gnomecompat,regex,mousepoll,vpswitch,unitymtgrabhandles,grid,place,session,animation,wall,workarounds,expo,fade,scale,ezoom,unityshell]
  CompositorRunning: None
  Date: Thu Dec 15 16:25:42 2011
  DistUpgraded: Fresh install
  DistroCodename: oneiric
  DistroVariant: ubuntu
  DkmsStatus:
-  bcmwl, 5.100.82.38+bdcom, 3.0.0-12-generic, i686: installed
-  bcmwl, 5.100.82.38+bdcom, 3.0.0-13-generic, i686: installed
-  bcmwl, 5.100.82.38+bdcom, 3.0.0-14-generic, i686: installed
+  bcmwl, 5.100.82.38+bdcom, 3.0.0-12-generic, i686: installed
+  bcmwl, 5.100.82.38+bdcom, 3.0.0-13-generic, i686: installed
+  bcmwl, 5.100.82.38+bdcom, 3.0.0-14-generic, i686: installed
  ExtraDebuggingInterest: Yes, whatever it takes to get this fixed in Ubuntu
  GpuHangFrequency: I don't know
  GpuHangReproducibility: Yes, I can easily reproduce it
  GpuHangStarted: Today
  GraphicsCard:
-  Intel Corporation Mobile 4 Series Chipset Integrated Graphics Controller 
[8086:2a42] (rev 07) (prog-if 00 [VGA controller])
-    Subsystem: Dell Device [1028:0233]
-    Subsystem: Dell Device [1028:0233]
+  Intel Corporation Mobile 4 Series Chipset Integrated Graphics Controller 
[8086:2a42] (rev 07) (prog-if 00 [VGA controller])
+    Subsystem: Dell Device [1028:0233]
+    Subsystem: Dell Device [1028:0233]
  InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Release i386 (20111012)
  MachineType: Dell Inc. Latitude E6400
  PccardctlIdent:
-  Socket 0:
-    no product info available
+  Socket 0:
+    no product info available
  PccardctlStatus:
-  Socket 0:
-    no card
+  Socket 0:
+    no card
  ProcEnviron:
-  PATH=(custom, user)
-  LANG=en_US.UTF-8
-  SHELL=/bin/bash
+  PATH=(custom, user)
+  LANG=en_US.UTF-8
+  SHELL=/bin/bash
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.0.0-14-generic 
root=UUID=5c70c5b3-e834-49fc-9202-3e31ee5b8189 ro quiet splash vt.handoff=7
  SourcePackage: xorg
  Symptom: display
  Title: Xorg freeze
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 10/30/2009
  dmi.bios.vendor: Dell Inc.
  dmi.bios.version: A19
  dmi.board.name: 0H635N
  dmi.board.vendor: Dell Inc.
  dmi.chassis.type: 8
  dmi.chassis.vendor: Dell Inc.
  dmi.modalias: 
dmi:bvnDellInc.:bvrA19:bd10/30/2009:svnDellInc.:pnLatitudeE6400:pvr:rvnDellInc.:rn0H635N:rvr:cvnDellInc.:ct8:cvr:
  dmi.product.name: Latitude E6400
  dmi.sys.vendor: Dell Inc.
  version.compiz: compiz 1:0.9.6+bzr20110929-0ubuntu6
  version.libdrm2: libdrm2 2.4.26-1ubuntu1
  version.libgl1-mesa-dri: libgl1-mesa-dri 7.11-0ubuntu3
  version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
  version.libgl1-mesa-glx: libgl1-mesa-glx 7.11-0ubuntu3
  version.xserver-xorg: xserver-xorg 1:7.6+7ubuntu7
  version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.6.0-1ubuntu13
  version.xserver-xorg-video-ati: xserver-xorg-video-ati 
1:6.14.99~git20110811.g93fc084-0ubuntu1
  version.xserver-xorg-video-intel: xserver-xorg-video-intel 
2:2.15.901-1ubuntu2.1
  version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 
1:0.0.16+git20110411+8378443-1

** Summary changed:

- Xorg freeze
+ 8086:2a42 Xorg freeze

-- 
You received this bug notification because you are a member of Ubuntu-X,
which is subscribed to xserver-xorg-video-intel in Ubuntu.
https://bugs.launchpad.net/bugs/905052

Title:
  8086:2a42 Xorg freeze

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