ryan vaughan, thank you for reporting this and helping make Ubuntu
better.

1) Could you please provide the full computer model as noted on the
sticker of the computer itself (not from the Bug Description, or the
result of a terminal command)?

2) Did this problem start occurring after an update? If so, which
specifically?

3) To see if this is already resolved in your release, could you please
update your HWE stack as per
https://wiki.ubuntu.com/Kernel/LTSEnablementStack and advise to the
results?

** Changed in: xorg (Ubuntu)
   Importance: Undecided => Low

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

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https://bugs.launchpad.net/bugs/1708520

Title:
  no hdmi signal

Status in xorg package in Ubuntu:
  Incomplete

Bug description:
  i cant connect my laptop to my tv through an hdmi it says no signal

  ProblemType: Bug
  DistroRelease: Ubuntu 16.04
  Package: xorg 1:7.7+13ubuntu3
  ProcVersionSignature: Ubuntu 4.4.0-87.110-generic 4.4.73
  Uname: Linux 4.4.0-87-generic x86_64
  .tmp.unity_support_test.1:
   
  ApportVersion: 2.20.1-0ubuntu2.10
  Architecture: amd64
  BootLog:
   
  CompizPlugins: No value set for 
`/apps/compiz-1/general/screen0/options/active_plugins'
  CompositorRunning: compiz
  CompositorUnredirectDriverBlacklist: '(nouveau|Intel).*Mesa 8.0'
  CompositorUnredirectFSW: true
  Date: Thu Aug  3 15:38:45 2017
  DistUpgraded: 2017-07-29 00:23:28,354 ERROR got error from PostInstallScript 
./xorg_fix_proprietary.py (Failed to execute child process 
"./xorg_fix_proprietary.py" (No such file or directory))
  DistroCodename: xenial
  DistroVariant: ubuntu
  ExtraDebuggingInterest: I just need to know a workaround
  GraphicsCard:
   Advanced Micro Devices, Inc. [AMD/ATI] Carrizo [1002:9874] (rev c5) (prog-if 
00 [VGA controller])
     Subsystem: Hewlett-Packard Company Carrizo [103c:80b0]
  InstallationDate: Installed on 2017-07-14 (20 days ago)
  InstallationMedia: Ubuntu 14.04.5 LTS "Trusty Tahr" - Release amd64 (20160803)
  MachineType: HP HP Pavilion Notebook
  ProcEnviron:
   LANGUAGE=en_US
   PATH=(custom, no user)
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.4.0-87-generic 
root=UUID=5893fc24-8d35-43ea-8baf-d032c38f7919 ro nomodeset quiet splash 
vt.handoff=7
  Renderer: Software
  SourcePackage: xorg
  UpgradeStatus: Upgraded to xenial on 2017-07-29 (5 days ago)
  dmi.bios.date: 07/14/2015
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: F.10
  dmi.board.asset.tag: Base Board Asset Tag
  dmi.board.name: 80B0
  dmi.board.vendor: HP
  dmi.board.version: 81.27
  dmi.chassis.type: 10
  dmi.chassis.vendor: HP
  dmi.chassis.version: Chassis Version
  dmi.modalias: 
dmi:bvnAmericanMegatrendsInc.:bvrF.10:bd07/14/2015:svnHP:pnHPPavilionNotebook:pvr:rvnHP:rn80B0:rvr81.27:cvnHP:ct10:cvrChassisVersion:
  dmi.product.name: HP Pavilion Notebook
  dmi.sys.vendor: HP
  version.compiz: compiz 1:0.9.12.2+16.04.20160823-0ubuntu1
  version.ia32-libs: ia32-libs N/A
  version.libdrm2: libdrm2 2.4.76-1~ubuntu16.04.1
  version.libgl1-mesa-dri: libgl1-mesa-dri 17.0.7-0ubuntu0.16.04.1
  version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
  version.libgl1-mesa-glx: libgl1-mesa-glx 17.0.7-0ubuntu0.16.04.1
  version.xserver-xorg-core: xserver-xorg-core 2:1.18.4-0ubuntu0.3
  version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.10.1-1ubuntu2
  version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.7.0-1
  version.xserver-xorg-video-intel: xserver-xorg-video-intel 
2:2.99.917+git20160325-1ubuntu1.2
  version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 
1:1.0.12-1build2
  xserver.bootTime: Thu Aug  3 15:34:47 2017
  xserver.configfile: default
  xserver.logfile: /var/log/Xorg.0.log
  xserver.outputs:
   
  xserver.version: 2:1.18.4-0ubuntu0.3

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