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[Bug 1511163] [NEW] HDMI output no longer works after running updates

 

Public bug reported:

This seems similar to 1496697 but i can't seem to work around the issue
by booting without the cable plugged in.  Ubuntu stopped recognizing my
HDMI connected monitor after a regular system update reboot.


lsb_release -rd
Description:	Ubuntu 14.04.3 LTS
Release:	14.04

xrandr
Screen 0: minimum 8 x 8, current 1366 x 768, maximum 32767 x 32767
eDP1 connected primary 1366x768+0+0 (normal left inverted right x axis y axis) 309mm x 173mm
   1366x768       60.0*+
   1360x768       59.8     60.0  
   1024x768       60.0  
   800x600        60.3     56.2  
   640x480        59.9  
VGA1 disconnected (normal left inverted right x axis y axis)
HDMI1 disconnected (normal left inverted right x axis y axis)
DP1 disconnected (normal left inverted right x axis y axis)
HDMI2 disconnected (normal left inverted right x axis y axis)
VIRTUAL1 disconnected (normal left inverted right x axis y axis)

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: linux-image-3.16.0-51-generic 3.16.0-51.69~14.04.1
ProcVersionSignature: Ubuntu 3.16.0-51.69~14.04.1-generic 3.16.7-ckt17
Uname: Linux 3.16.0-51-generic x86_64
ApportVersion: 2.14.1-0ubuntu3.18
Architecture: amd64
CurrentDesktop: Unity
Date: Wed Oct 28 20:26:35 2015
InstallationDate: Installed on 2015-04-16 (195 days ago)
InstallationMedia: Ubuntu 14.04.2 LTS "Trusty Tahr" - Release amd64 (20150218.1)
SourcePackage: linux-lts-utopic
UpgradeStatus: No upgrade log present (probably fresh install)

** Affects: linux-lts-utopic (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug trusty

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https://bugs.launchpad.net/bugs/1511163

Title:
  HDMI output no longer works after running updates

Status in linux-lts-utopic package in Ubuntu:
  New

Bug description:
  This seems similar to 1496697 but i can't seem to work around the
  issue by booting without the cable plugged in.  Ubuntu stopped
  recognizing my HDMI connected monitor after a regular system update
  reboot.

  
  lsb_release -rd
  Description:	Ubuntu 14.04.3 LTS
  Release:	14.04

  xrandr
  Screen 0: minimum 8 x 8, current 1366 x 768, maximum 32767 x 32767
  eDP1 connected primary 1366x768+0+0 (normal left inverted right x axis y axis) 309mm x 173mm
     1366x768       60.0*+
     1360x768       59.8     60.0  
     1024x768       60.0  
     800x600        60.3     56.2  
     640x480        59.9  
  VGA1 disconnected (normal left inverted right x axis y axis)
  HDMI1 disconnected (normal left inverted right x axis y axis)
  DP1 disconnected (normal left inverted right x axis y axis)
  HDMI2 disconnected (normal left inverted right x axis y axis)
  VIRTUAL1 disconnected (normal left inverted right x axis y axis)

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: linux-image-3.16.0-51-generic 3.16.0-51.69~14.04.1
  ProcVersionSignature: Ubuntu 3.16.0-51.69~14.04.1-generic 3.16.7-ckt17
  Uname: Linux 3.16.0-51-generic x86_64
  ApportVersion: 2.14.1-0ubuntu3.18
  Architecture: amd64
  CurrentDesktop: Unity
  Date: Wed Oct 28 20:26:35 2015
  InstallationDate: Installed on 2015-04-16 (195 days ago)
  InstallationMedia: Ubuntu 14.04.2 LTS "Trusty Tahr" - Release amd64 (20150218.1)
  SourcePackage: linux-lts-utopic
  UpgradeStatus: No upgrade log present (probably fresh install)

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