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[Launchpad Bug Tracker <1203211@xxxxxxxxxxxxxxxxxx>]

Status changed to 'Confirmed' because the bug affects multiple users.

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

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https://bugs.launchpad.net/bugs/1203211

Title:
  Kernel 3.10.0-4 fails on graphical boot with i915 (MacBook Pro 8,2)

Status in “gdm” package in Ubuntu:
  Confirmed
Status in “linux” package in Ubuntu:
  Confirmed

Bug description:
  After updating today to kernel 3.10.0-4 on Ubuntu GNOME 13.10 (Macbook
  Pro 8,2), I am unable to boot graphically. Recovery mode boot works
  fine. When attempting to boot using integrated graphics, the syslog
  gets spammed with this sequence of errors over and over:

  Jul 19 19:07:09 polarimetric-MacBookPro acpid: 1 client rule loaded
  Jul 19 19:07:09 polarimetric-MacBookPro kernel: [   26.475546] i915: Unknown parameter `modeset'
  Jul 19 19:07:09 polarimetric-MacBookPro gdm-simple-slave[1426]: Child process 1432 was already dead.
  Jul 19 19:07:09 polarimetric-MacBookPro gdm-simple-slave[1426]: GLib-GObject: g_object_ref: assertion 'object->ref_count > 0' failed
  Jul 19 19:07:09 polarimetric-MacBookPro gdm-simple-slave[1426]: GLib-GObject: g_object_unref: assertion 'object->ref_count > 0' failed
  Jul 19 19:07:09 polarimetric-MacBookPro gdm[1189]: GdmDisplay: display lasted 0.096139 seconds
  Jul 19 19:07:09 polarimetric-MacBookPro gdm[1189]: GdmDisplay: display lasted 0.097622 seconds
  Jul 19 19:07:09 polarimetric-MacBookPro acpid: client 1432[0:0] has disconnected

  This error does not occur on the previous version 3.10.0-3. Since this
  only occurs on 3.10.0-4 but the errors are GDM-related, I'm not sure
  if it's a kernel bug or a GDM bug, so I'm marking it as affecting both
  for the time being. I think it's kernel-related, though, because I
  never see any text on the screen, and the screen backlight never comes
  on (normally, I see a message about the wl driver registering my
  wireless card and IRQ #17 being disabled before GDM initializes).

  EDIT: Please ignore the version string in the below information; I'm
  reporting this bug from 3.10.0-3 but it only affects 3.10.0-4.

  ProblemType: Bug
  DistroRelease: Ubuntu 13.10
  Package: linux-image-3.10.0-3-generic 3.10.0-3.12
  ProcVersionSignature: Ubuntu 3.10.0-3.12-generic 3.10.1
  Uname: Linux 3.10.0-3-generic x86_64
  NonfreeKernelModules: wl
  ApportVersion: 2.11-0ubuntu1
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  polarimetric   1862 F.... pulseaudio
  Date: Fri Jul 19 19:35:57 2013
  HibernationDevice: RESUME=UUID=8b32a68d-d883-4492-8fa1-a2cf30529ec6
  InstallationDate: Installed on 2013-06-06 (43 days ago)
  InstallationMedia: Ubuntu-GNOME 13.04 "Raring Ringtail" - Release amd64 (20130424)
  MachineType: Apple Inc. MacBookPro8,2
  MarkForUpload: True
  ProcEnviron:
   TERM=xterm
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  ProcFB:
   0 EFI VGA
   1 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.10.0-3-generic root=UUID=070a2baf-a3a7-4034-aeaf-419e7b9df4f7 ro quiet splash i915.modeset=1 i915.lvds_channel_mode=2 i915.lvds_use_ssc=0 intel_pstate=enable vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-3.10.0-3-generic N/A
   linux-backports-modules-3.10.0-3-generic  N/A
   linux-firmware                            1.112
  SourcePackage: linux
  UpgradeStatus: Upgraded to saucy on 2013-06-28 (21 days ago)
  dmi.bios.date: 01/24/12
  dmi.bios.vendor: Apple Inc.
  dmi.bios.version: MBP81.88Z.0047.B27.1201241646
  dmi.board.asset.tag: Base Board Asset Tag#
  dmi.board.name: Mac-94245A3940C91C80
  dmi.board.vendor: Apple Inc.
  dmi.board.version: MacBookPro8,2
  dmi.chassis.type: 10
  dmi.chassis.vendor: Apple Inc.
  dmi.chassis.version: Mac-94245A3940C91C80
  dmi.modalias: dmi:bvnAppleInc.:bvrMBP81.88Z.0047.B27.1201241646:bd01/24/12:svnAppleInc.:pnMacBookPro8,2:pvr1.0:rvnAppleInc.:rnMac-94245A3940C91C80:rvrMacBookPro8,2:cvnAppleInc.:ct10:cvrMac-94245A3940C91C80:
  dmi.product.name: MacBookPro8,2
  dmi.product.version: 1.0
  dmi.sys.vendor: Apple Inc.

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