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[Alberto Salvia Novella <es20490446e@xxxxxxxxx>]

** Changed in: nvidia-prime (Ubuntu)
       Status: Confirmed => Triaged

** Changed in: nvidia-prime (Ubuntu Precise)
       Status: Confirmed => Triaged

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https://bugs.launchpad.net/bugs/1296020

Title:
  [Asus U36JC] Non-existent display detected in both intel driver and
  nvidia driver (Optimus Laptop) (ubuntu trusty 14.04)

Status in nvidia-prime package in Ubuntu:
  Triaged
Status in ubuntu-drivers-common package in Ubuntu:
  Fix Released
Status in nvidia-prime source package in Precise:
  Triaged
Status in ubuntu-drivers-common source package in Precise:
  Invalid
Status in nvidia-prime source package in Trusty:
  Invalid
Status in ubuntu-drivers-common source package in Trusty:
  Fix Released

Bug description:
  SRU Request

  Systems with Optimus (Intel+NVIDIA GPUs) can have ghost VGA devices
  hardcoded in the BIOS. This leads the system into thinking that there
  is actually one more active output than there really is.

  [Impact]
   * The ghost VGA output confuses lightdm and the gnome-settings-daemon making the system unusable.

  [Test Case]
   * Install the nvidia binary driver, reboot, and check the output of the "xrandr -q" command
      - Expected: only the outputs that are actually connected will be marked as active.
      - Bad behavior: a non-existent VGA device will show up in the output.

  [Regression Potential]
   * Low, as it only disables CRT outputs in the nvidia driver.

  [Other Info]
   * N/A

  --

  There is a non existent display detected in both intel driver only and nvidia 331 driver installation.
  The non existent display is "Unknown Display" shown in gnome-control-center --> display and "CRT-0" in nvidia-settings, and "VGA-0" in xrandr -q output.
  It will cause gdm failed to start. gnome-shell has some crazy layouts. lightdm will only occupy 2/3 of monitor in top left corner.
  I tested this in intel driver only environment. and nvidia-331 installation environment.
  My laptop is Asus U36JC. My monitor correct resolution is 1366x768.

  The following is the output of "xrandr -q" in gnome-shell with
  nvidia-331 installed:

  $ xrandr -q
  Screen 0: minimum 8 x 8, current 1366 x 768, maximum 8192 x 8192
  VGA-0 connected primary 680x384+0+0 (normal left inverted right x axis y axis) 0mm x 0mm panning 1366x768+0+0
     680x384 60.0*+
     1366x768 60.0
     1360x768 60.0
  HDMI-0 disconnected (normal left inverted right x axis y axis)
  LVDS-1-0 connected 1366x768+0+0 (normal left inverted right x axis y axis) 293mm x 165mm
     1366x768 60.0*+
     1360x768 59.8 60.0
     1024x768 60.0 60.0
     960x720 60.0
     928x696 60.1
     896x672 60.0
     960x600 60.0
     960x540 60.0
     800x600 60.0 60.3 56.2
     840x525 60.0 59.9
     800x512 60.2
     700x525 60.0
     640x512 60.0
     720x450 59.9
     640x480 60.0 59.9
     680x384 59.8 60.0
     576x432 60.1
     512x384 60.0
     400x300 60.3 56.3
     320x240 60.1
  VGA-1-0 disconnected (normal left inverted right x axis y axis)
  HDMI-1-0 disconnected (normal left inverted right x axis y axis)
  DisplayPort-1-0 disconnected (normal left inverted right x axis y axis)
    1366x768 (0x46) 69.3MHz
          h: width 1366 start 1425 end 1464 total 1472 skew 0 clock 47.1KHz
          v: height 768 start 773 end 782 total 785 clock 60.0Hz
    1360x768 (0x48) 72.0MHz
          h: width 1360 start 1408 end 1440 total 1520 skew 0 clock 47.4KHz
          v: height 768 start 771 end 781 total 790 clock 60.0Hz
    680x384 (0x5c) 36.0MHz
          h: width 680 start 704 end 720 total 760 skew 0 clock 47.4KHz
          v: height 384 start 385 end 390 total 395 clock 60.0Hz

  The following is the output of "xrandr -q" in lxde with nvidia-331
  installed:

  $ xrandr -q
  Screen 0: minimum 8 x 8, current 1366 x 768, maximum 8192 x 8192
  VGA-0 connected primary 1024x768+31+0 (normal left inverted right x axis y axis) 0mm x 0mm panning 1366x768+0+0
     680x384        60.0 +
     1366x768       60.0
     1360x768       60.0
  HDMI-0 disconnected (normal left inverted right x axis y axis)
  LVDS-1-0 connected 1366x768+0+0 (normal left inverted right x axis y axis) 293mm x 165mm
     1366x768       60.0*+
     1360x768       59.8     60.0
     1024x768       60.0     60.0
     960x720        60.0
     928x696        60.1
     896x672        60.0
     960x600        60.0
     960x540        60.0
     800x600        60.0     60.3     56.2
     840x525        60.0     59.9
     800x512        60.2
     700x525        60.0
     640x512        60.0
     720x450        59.9
     640x480        60.0     59.9
     680x384        59.8     60.0
     576x432        60.1
     512x384        60.0
     400x300        60.3     56.3
     320x240        60.1
  VGA-1-0 disconnected (normal left inverted right x axis y axis)
  HDMI-1-0 disconnected (normal left inverted right x axis y axis)
  DisplayPort-1-0 disconnected (normal left inverted right x axis y axis)
    1366x768 (0x46)   69.3MHz
          h: width  1366 start 1425 end 1464 total 1472 skew    0 clock   47.1KHz
          v: height  768 start  773 end  782 total  785           clock   60.0Hz
    1360x768 (0x48)   72.0MHz
          h: width  1360 start 1408 end 1440 total 1520 skew    0 clock   47.4KHz
          v: height  768 start  771 end  781 total  790           clock   60.0Hz
    1024x768 (0x4a)   65.0MHz
          h: width  1024 start 1048 end 1184 total 1344 skew    0 clock   48.4KHz
          v: height  768 start  771 end  777 total  806           clock   60.0Hz
    680x384 (0x5c)   36.0MHz
          h: width   680 start  704 end  720 total  760 skew    0 clock   47.4KHz
          v: height  384 start  385 end  390 total  395           clock   60.0Hz

  Note: this Unknown non-existent display happens in intel driver only
  environment TOO. If required, I can provide "xrandr -q" output with
  that environment. At present, I don't bother to remove/purge my
  nvidia-331 installation.

  Please let me know if anything else is required. Thank you very much!

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: xorg 1:7.7+1ubuntu8
  ProcVersionSignature: Ubuntu 3.13.0-18.38-generic 3.13.6
  Uname: Linux 3.13.0-18-generic x86_64
  NonfreeKernelModules: nvidia
  .proc.driver.nvidia.gpus.0: Error: [Errno 21] Is a directory: '/proc/driver/nvidia/gpus/0'
  .proc.driver.nvidia.registry: Binary: ""
  .proc.driver.nvidia.version:
   NVRM version: NVIDIA UNIX x86_64 Kernel Module  331.38  Wed Jan  8 19:32:30 PST 2014
   GCC version:  gcc version 4.8.2 (Ubuntu 4.8.2-16ubuntu6)
  ApportVersion: 2.13.3-0ubuntu1
  Architecture: amd64
  CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins'
  CompositorRunning: None
  CurrentDesktop: LXDE
  Date: Sat Mar 22 18:47:26 2014
  DistUpgraded: Fresh install
  DistroCodename: trusty
  DistroVariant: ubuntu
  DkmsStatus:
   bbswitch, 0.7, 3.13.0-17-generic, x86_64: installed
   bbswitch, 0.7, 3.13.0-18-generic, x86_64: installed
   nvidia-331, 331.38, 3.13.0-18-generic, x86_64: installed
  EcryptfsInUse: Yes
  ExtraDebuggingInterest: No
  GraphicsCard:
   Intel Corporation Core Processor Integrated Graphics Controller [8086:0046] (rev 18) (prog-if 00 [VGA controller])
     Subsystem: ASUSTeK Computer Inc. Device [1043:1542]
   NVIDIA Corporation GT218M [GeForce 310M] [10de:0a70] (rev a2) (prog-if 00 [VGA controller])
     Subsystem: ASUSTeK Computer Inc. Device [1043:1542]
  InstallationDate: Installed on 2014-03-04 (17 days ago)
  InstallationMedia: Ubuntu-GNOME 14.04 "Trusty Tahr" - Alpha amd64 (20140226)
  MachineType: ASUSTeK Computer Inc. U36JC
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-18-generic root=UUID=0d039a7c-cdff-4d22-9604-569584977a76 ro quiet splash
  SourcePackage: xorg
  Symptom: display
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 01/26/2011
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: U36JC.205
  dmi.board.asset.tag: ATN12345678901234567
  dmi.board.name: U36JC
  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.:bvrU36JC.205:bd01/26/2011:svnASUSTeKComputerInc.:pnU36JC:pvr1.0:rvnASUSTeKComputerInc.:rnU36JC:rvr1.0:cvnASUSTeKComputerInc.:ct10:cvr1.0:
  dmi.product.name: U36JC
  dmi.product.version: 1.0
  dmi.sys.vendor: ASUSTeK Computer Inc.
  version.compiz: compiz N/A
  version.ia32-libs: ia32-libs N/A
  version.libdrm2: libdrm2 2.4.52-1
  version.libgl1-mesa-dri: libgl1-mesa-dri 10.1.0-1ubuntu1
  version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
  version.libgl1-mesa-glx: libgl1-mesa-glx 10.1.0-1ubuntu1
  version.nvidia-graphics-drivers: nvidia-graphics-drivers N/A
  version.xserver-xorg-core: xserver-xorg-core 2:1.15.0-1ubuntu7
  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
  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: Sat Mar 22 12:36:00 2014
  xserver.configfile: /etc/X11/xorg.conf
  xserver.errors:

  xserver.logfile: /var/log/Xorg.0.log
  xserver.version: 2:1.15.0-1ubuntu7

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