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[Joachim Mathes <joachim_mathes@xxxxxx>]

As a matter of fact I discovered that kernel 3.13.0-61 was not the
reason to make it work again, at least not the kernel itself. After
rebooting the running kernel was still 3.13.0-62. But this time the HDMI
worked. Maybe the process of installing had a certain side effect. I
don't know. Now I am running kernel 3.13.0-63 without any problems.

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https://bugs.launchpad.net/bugs/1490689

Title:
  HDMI no longer available

Status in linux package in Ubuntu:
  Incomplete

Bug description:
  As of linux image linux-image-3.13.0-62-generic the HDMI port of my
  Dell Inspiron 15 stopped working:

  $ xrandr
  Screen 0: minimum 320 x 200, current 1920 x 1080, maximum 32767 x 32767
  eDP1 connected primary 1920x1080+0+0 (normal left inverted right x axis y axis) 344mm x 194mm
     3840x2160      60.0 +   48.0
     2048x1536      60.0
     1920x1440      60.0
     1856x1392      60.0
     1792x1344      60.0
     1920x1200      60.0
     1920x1080      59.9*
     1600x1200      60.0
     1680x1050      60.0     59.9
     1600x1024      60.2
     1400x1050      60.0
     1280x1024      60.0
     1440x900       59.9
     1280x960       60.0
     1360x768       59.8     60.0
     1152x864       60.0
     1024x768       60.0
     800x600        60.3     56.2
     640x480        59.9
  VIRTUAL1 disconnected (normal left inverted right x axis y axis)

  The only thing I could do was downgrading the image:
  $ sudo apt-get install linux-image-3.13.0-61-generic
  $ xrandr
  Screen 0: minimum 320 x 200, current 1920 x 1080, maximum 32767 x 32767
  eDP1 connected primary 1920x1080+0+0 (normal left inverted right x axis y axis) 344mm x 194mm
     3840x2160      60.0 +   48.0
     2048x1536      60.0
     1920x1440      60.0
     1856x1392      60.0
     1792x1344      60.0
     1920x1200      60.0
     1920x1080      59.9*
     1600x1200      60.0
     1680x1050      60.0     59.9
     1600x1024      60.2
     1400x1050      60.0
     1280x1024      60.0
     1440x900       59.9
     1280x960       60.0
     1360x768       59.8     60.0
     1152x864       60.0
     1024x768       60.0
     800x600        60.3     56.2
     640x480        59.9
  HDMI1 disconnected (normal left inverted right x axis y axis)
  VIRTUAL1 disconnected (normal left inverted right x axis y axis)

  Will this be fixed with the next linux image update? Otherwise, I have
  to pin the current version.

  Best
  Joachim

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: linux-image-3.13.0-62-generic 3.13.0-62.102
  ProcVersionSignature: Ubuntu 3.13.0-62.102-generic 3.13.11-ckt24
  Uname: Linux 3.13.0-62-generic x86_64
  ApportVersion: 2.14.1-0ubuntu3.12
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  ry28       2715 F.... pulseaudio
   /dev/snd/controlC1:  ry28       2715 F.... pulseaudio
  CurrentDesktop: Unity
  Date: Mon Aug 31 21:08:16 2015
  HibernationDevice: RESUME=UUID=fb43d083-b016-4ee5-b7de-2031c0989027
  InstallationDate: Installed on 2015-02-12 (199 days ago)
  InstallationMedia: Ubuntu 14.04.1 LTS "Trusty Tahr" - Release amd64 (20140722.2)
  MachineType: Dell Inc. Inspiron 7548
  ProcFB:
   0 inteldrmfb
   1 radeondrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.13.0-62-generic.efi.signed root=/dev/mapper/ubuntu--vg-root ro quiet splash vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-3.13.0-62-generic N/A
   linux-backports-modules-3.13.0-62-generic  N/A
   linux-firmware                             1.127.15
  SourcePackage: linux
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 11/19/2014
  dmi.bios.vendor: Dell Inc.
  dmi.bios.version: A00
  dmi.board.name: 0AM6R0
  dmi.board.vendor: Dell Inc.
  dmi.board.version: A00
  dmi.chassis.type: 8
  dmi.chassis.vendor: Dell Inc.
  dmi.chassis.version: Not Specified
  dmi.modalias: dmi:bvnDellInc.:bvrA00:bd11/19/2014:svnDellInc.:pnInspiron7548:pvrA00:rvnDellInc.:rn0AM6R0:rvrA00:cvnDellInc.:ct8:cvrNotSpecified:
  dmi.product.name: Inspiron 7548
  dmi.product.version: A00
  dmi.sys.vendor: Dell Inc.

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