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[Bug 851503] Re: second monitor turns off at login and stays off

 

Rocko, 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 images are available from http://cdimage.ubuntu.com
/daily-live/current/ .

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 (not the daily folder) following https://wiki.ubuntu.com/KernelMainlineBuilds ? It will allow additional upstream developers to examine the issue. Once you've tested the upstream kernel, please comment on which kernel version specifically you tested. If this bug is fixed in the mainline kernel, please add the following tags:
kernel-fixed-upstream
kernel-fixed-upstream-VERSION-NUMBER

where VERSION-NUMBER is the version number of the kernel you tested. For example:
kernel-fixed-upstream-v3.12

This can be done by clicking on the yellow circle with a black pencil icon next to the word Tags located at the bottom of the bug description. As well, please remove the tag:
needs-upstream-testing

If the mainline kernel does not fix this bug, please add the following tags:
kernel-bug-exists-upstream
kernel-bug-exists-upstream-VERSION-NUMBER

As well, please remove the tag:
needs-upstream-testing

Once testing of the upstream kernel is complete, please mark this bug's
Status as Confirmed. Please let us know your results. Thank you for your
understanding.

** Tags added: bios-outdated-a12 needs-upstream-testing

** Tags removed: kernel-request-3.0.0-12.19 kernel-request-3.0.0-12.20
** Tags added: bot-stop-nagging

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

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

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https://bugs.launchpad.net/bugs/851503

Title:
  second monitor turns off at login and stays off

Status in “linux” package in Ubuntu:
  Incomplete

Bug description:
  I have a laptop with a Sandy Bridge chipset and an external monitor
  connected via mini-display port. When the lightdm login screen
  appears, the external monitor turns off and does not come back on
  after login. xrandr indicates that the monitor is on even though it
  clearly isn't.

  This is a known bug in the 3.0 kernel which has been fixed in the 3.1
  kernel, but the author wasn't specific about which one of several
  patches fixed the problem.

  The workaround is to either use xrandr or the display settings (which
  are harder to use in Oneiric since the display indicator was removed)
  to turn the monitor off and back on again.

  ProblemType: Bug
  DistroRelease: Ubuntu 11.10
  Package: linux-image 3.0.0.11.12
  ProcVersionSignature: Ubuntu 3.0.0-11.18-generic 3.0.4
  Uname: Linux 3.0.0-11-generic x86_64
  AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24.
  ApportVersion: 1.23-0ubuntu1
  Architecture: amd64
  ArecordDevices:
   **** List of CAPTURE Hardware Devices ****
   card 0: PCH [HDA Intel PCH], device 0: ALC665 Analog [ALC665 Analog]
     Subdevices: 1/1
     Subdevice #0: subdevice #0
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  sean       3253 F.... pulseaudio
  CRDA: Error: [Errno 2] No such file or directory
  Card0.Amixer.info:
   Card hw:0 'PCH'/'HDA Intel PCH at 0xf1c00000 irq 53'
     Mixer name	: 'Intel CougarPoint HDMI'
     Components	: 'HDA:10ec0665,1028050e,00100003 HDA:80862805,80860101,00100000'
     Controls      : 28
     Simple ctrls  : 14
  Date: Fri Sep 16 10:09:48 2011
  InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Beta amd64 (20110330)
  MachineType: Dell Inc. Dell System XPS L502X
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.0.0-11-generic root=UUID=67083065-b92e-4596-a218-817c1dfc8ae7 ro quiet splash i915.i915_enable_rc6=1 pcie_aspm=force i915.lvds_downclock=1 i915.i915_enable_fbc=1 vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-3.0.0-11-generic N/A
   linux-backports-modules-3.0.0-11-generic  N/A
   linux-firmware                            1.60
  SourcePackage: linux
  StagingDrivers: mei
  UpgradeStatus: Upgraded to oneiric on 2011-09-15 (0 days ago)
  dmi.bios.date: 03/25/2011
  dmi.bios.vendor: Dell Inc.
  dmi.bios.version: A04
  dmi.board.name: 0NJT03
  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:bd03/25/2011:svnDellInc.:pnDellSystemXPSL502X:pvr:rvnDellInc.:rn0NJT03:rvrA00:cvnDellInc.:ct8:cvr0.1:
  dmi.product.name: Dell System XPS L502X
  dmi.sys.vendor: Dell Inc.

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