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[Brad Figg <brad.figg@xxxxxxxxxxxxx>]

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** Changed in: linux (Ubuntu)
       Status: New => Confirmed

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https://bugs.launchpad.net/bugs/1596216

Title:
  Black screen on boot; no modeset workaround broken by 16.04

Status in linux package in Ubuntu:
  Confirmed

Bug description:
  This bug appears to occur in several distros and architectures.  On
  this machine, it appeared somewhere in the last week of January, 2016,
  after a system update.

  On boot, the laptop monitor often flickers several times (signal
  connecting and disconnecting) and always settles onto a full backlight
  back screen.  The screen does not change after that.

  I found reports that adding nomodeset to the grub parameters would
  resolve the issue.  It does, but the workaround has significant issues
  in 16.04.  The nomodeset parameters conflict with both the amdgpu
  driver package and the radeon driver package.  When the machine boots,
  it is in 800x600 resolution.  While I can add new resolutions,
  attempting to switch to them with xrandr throws the error "configure
  crtc0 failed"

  ProblemType: Bug
  DistroRelease: Ubuntu 16.04
  Package: linux-image-4.4.0-24-generic 4.4.0-24.43
  ProcVersionSignature: Ubuntu 4.4.0-24.43-generic 4.4.10
  Uname: Linux 4.4.0-24-generic x86_64
  ApportVersion: 2.20.1-0ubuntu2.1
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC1:  jbhelfrich   2053 F.... pulseaudio
   /dev/snd/controlC0:  jbhelfrich   2053 F.... pulseaudio
  CurrentDesktop: MATE
  Date: Sat Jun 25 14:49:22 2016
  HibernationDevice: RESUME=UUID=51835e9e-6087-4108-af31-95e11fc3401c
  InstallationDate: Installed on 2015-10-30 (238 days ago)
  InstallationMedia: Ubuntu-MATE 15.04 "Vivid Vervet" - Release amd64 (20150422.1)
  MachineType: HP HP Pavilion Notebook
  ProcFB: 0 EFI VGA
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.4.0-24-generic.efi.signed root=UUID=613f6223-b665-4289-9dfa-7b003124dfdf ro quiet splash nomodeset i8042.dumbkbd=1 vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-4.4.0-24-generic N/A
   linux-backports-modules-4.4.0-24-generic  N/A
   linux-firmware                            1.157.1
  SourcePackage: linux
  UpgradeStatus: Upgraded to xenial on 2016-06-24 (1 days ago)
  dmi.bios.date: 08/06/2015
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: F.13
  dmi.board.asset.tag: Base Board Asset Tag
  dmi.board.name: 80AF
  dmi.board.vendor: HP
  dmi.board.version: 81.28
  dmi.chassis.type: 10
  dmi.chassis.vendor: HP
  dmi.chassis.version: Chassis Version
  dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrF.13:bd08/06/2015:svnHP:pnHPPavilionNotebook:pvr:rvnHP:rn80AF:rvr81.28:cvnHP:ct10:cvrChassisVersion:
  dmi.product.name: HP Pavilion Notebook
  dmi.sys.vendor: HP

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