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["Christopher M. Penalver" <christopher.m.penalver@xxxxxxxxx>]

Steve_Bz, yes.

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https://bugs.launchpad.net/bugs/1260214

Title:
  8086:0166 [ASUS TAICHI 21] External screen doesn't work.

Status in “linux” package in Ubuntu:
  Triaged

Bug description:
  External screen on ASUS Taichi21 ultrabook doesn't show anything. The
  backlight is always off also. Both screens are being recognized by OS,
  and can be managed, but external screen is off, no matter which
  options are chosen. Tested with 3.8 repository kernel, and with
  3.13.0-0311300rc3 mainline kernel.

  ProblemType: Bug
  DistroRelease: Ubuntu 13.04
  Package: linux-image-3.8.0-34-generic 3.8.0-34.49
  ProcVersionSignature: Ubuntu 3.8.0-34.49-generic 3.8.13.12
  Uname: Linux 3.8.0-34-generic x86_64
  ApportVersion: 2.9.2-0ubuntu8.5
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  soimimozo   1844 F.... pulseaudio
  Date: Thu Dec 12 17:06:14 2013
  HibernationDevice: RESUME=UUID=76d4fac3-6b56-4dc2-b04b-1590849c4026
  InstallationDate: Installed on 2013-12-09 (2 days ago)
  InstallationMedia: Ubuntu 13.04 "Raring Ringtail" - Release amd64 (20130424)
  MachineType: ASUSTeK COMPUTER INC. TAICHI21A
  MarkForUpload: True
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.8.0-34-generic root=UUID=b0c6a357-cbe3-4ed0-8193-2d90569de03d ro quiet splash vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-3.8.0-34-generic N/A
   linux-backports-modules-3.8.0-34-generic  N/A
   linux-firmware                            1.106
  SourcePackage: linux
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 02/04/2013
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: TAICHI21A.203
  dmi.board.asset.tag: ATN12345678901234567
  dmi.board.name: TAICHI21A
  dmi.board.vendor: ASUSTeK COMPUTER INC.
  dmi.board.version: 1.0
  dmi.chassis.asset.tag: No Asset Tag
  dmi.chassis.type: 10
  dmi.chassis.vendor: ASUSTeK COMPUTER INC.
  dmi.chassis.version: 1.0
  dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrTAICHI21A.203:bd02/04/2013:svnASUSTeKCOMPUTERINC.:pnTAICHI21A:pvr1.0:rvnASUSTeKCOMPUTERINC.:rnTAICHI21A:rvr1.0:cvnASUSTeKCOMPUTERINC.:ct10:cvr1.0:
  dmi.product.name: TAICHI21A
  dmi.product.version: 1.0
  dmi.sys.vendor: ASUSTeK COMPUTER INC.

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