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

GoddamnNoise:
1) Which driver version(s) specifically did you test, and from where?
2) What update is the one that caused this regression?

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https://bugs.launchpad.net/bugs/1496697

Title:
  HDMI output gone after completing ubuntu updates

Status in linux package in Ubuntu:
  Incomplete

Bug description:
  Hi,

  I've Ubuntu 14.04 LTS installed on a Toshiba Satellite laptop (it has
  an integrated Intel video card and an AMD Radeon video card). After
  installation I was using an external monitor screen connected to the
  laptop through the HDMI laptop's output. Everything worked fine until
  the Ubuntu's Software Updater showed me some pending updates. I've
  made the updates and the next time i restarted the laptop, there was
  no way to detect the external screen. After googling a lot about this,
  i couldn't find a solution to my problem.

  This is the output of the xrandr command:

  
  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) 344mm x 194mm
     1366x768       60.0*+
     1360x768       59.8     60.0  
     1024x768       60.0  
     800x600        60.3     56.2  
     640x480        59.9  
  VIRTUAL1 disconnected (normal left inverted right x axis y axis)

  As you see, the HDMI output is not shown, but it was shown until the
  Ubuntu update.

  I think this is the same problem reported at
  https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1490689

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: linux-image-3.16.0-49-generic 3.16.0-49.65~14.04.1
  ProcVersionSignature: Ubuntu 3.16.0-49.65~14.04.1-generic 3.16.7-ckt15
  Uname: Linux 3.16.0-49-generic x86_64
  ApportVersion: 2.14.1-0ubuntu3.13
  Architecture: amd64
  CurrentDesktop: Unity
  Date: Thu Sep 17 08:28:42 2015
  InstallationDate: Installed on 2015-08-27 (20 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)
  --- 
  ApportVersion: 2.14.1-0ubuntu3.13
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  anx        2201 F.... pulseaudio
   /dev/snd/controlC1:  anx        2201 F.... pulseaudio
  CurrentDesktop: Unity
  DistroRelease: Ubuntu 14.04
  HibernationDevice: RESUME=UUID=4a2a2299-ed97-40df-abd8-43b8c3b75ea9
  InstallationDate: Installed on 2015-08-27 (21 days ago)
  InstallationMedia: Ubuntu 14.04.2 LTS "Trusty Tahr" - Release amd64 (20150218.1)
  MachineType: TOSHIBA SATELLITE S50-B
  Package: linux (not installed)
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.16.0-49-generic.efi.signed root=UUID=79cca19f-0286-4b83-8028-204a3131de95 ro quiet splash vt.handoff=7
  ProcVersionSignature: Ubuntu 3.16.0-49.65~14.04.1-generic 3.16.7-ckt15
  RelatedPackageVersions:
   linux-restricted-modules-3.16.0-49-generic N/A
   linux-backports-modules-3.16.0-49-generic  N/A
   linux-firmware                             1.127.15
  Tags:  trusty
  Uname: Linux 3.16.0-49-generic x86_64
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo
  _MarkForUpload: True
  dmi.bios.date: 12/02/2014
  dmi.bios.vendor: INSYDE Corp.
  dmi.bios.version: 2.00
  dmi.board.asset.tag: Type2 - Board Asset Tag
  dmi.board.name: Type2 - Board Product Name1
  dmi.board.vendor: Type2 - Board Vendor Name1
  dmi.board.version: Type2 - Board Version
  dmi.chassis.asset.tag: No Asset Tag
  dmi.chassis.type: 10
  dmi.chassis.vendor: OEM Chassis ManuFacturer
  dmi.chassis.version: OEM Chassis Version
  dmi.modalias: dmi:bvnINSYDECorp.:bvr2.00:bd12/02/2014:svnTOSHIBA:pnSATELLITES50-B:pvrPSPQEE-00M00GCE:rvnType2-BoardVendorName1:rnType2-BoardProductName1:rvrType2-BoardVersion:cvnOEMChassisManuFacturer:ct10:cvrOEMChassisVersion:
  dmi.product.name: SATELLITE S50-B
  dmi.product.version: PSPQEE-00M00GCE
  dmi.sys.vendor: TOSHIBA

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