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[qwach <1208216@xxxxxxxxxxxxxxxxxx>]

Possibly relevant (from BootDmesg.txt):
[   36.464206] [drm:drm_pci_agp_init] *ERROR* Cannot initialize the agpgart module.
[   36.464234] DRM: Fill_in_dev failed.

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https://bugs.launchpad.net/bugs/1208216

Title:
  Black screen without "nomodeset" boot option

Status in “linux” package in Ubuntu:
  Confirmed

Bug description:
  I recently updated the firmware on my Lenovo G580 (Bluetooth being
  broken with the old one), and now I can only boot 13.04 (installed as
  well as Live USB) with nomodeset enabled. Even with that option, I
  seem to be stuck on software rendering, can't change the screen
  brightness, and trying to switch to a VT only freezes the system on a
  solid gray screen, but I guess that's something for separate bug
  reports. GPUs: Intel HD 4000; Nvidia GT 635M (Optimus, normally
  unused).

  ProblemType: Bug
  DistroRelease: Ubuntu 13.04
  Package: linux-image-3.8.0-27-generic 3.8.0-27.40
  ProcVersionSignature: Ubuntu 3.8.0-27.40-generic 3.8.13.4
  Uname: Linux 3.8.0-27-generic x86_64
  NonfreeKernelModules: wl
  ApportVersion: 2.9.2-0ubuntu8.1
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  nicolas    3851 F.... pulseaudio
  Date: Sun Aug  4 19:22:19 2013
  HibernationDevice: RESUME=UUID=781bd430-e398-405a-a850-76765487ebf1
  InstallationDate: Installed on 2013-01-01 (215 days ago)
  InstallationMedia: Ubuntu 12.10 "Quantal Quetzal" - Release amd64 (20121017.5)
  MachineType: LENOVO 2189
  MarkForUpload: True
  ProcFB: 0 EFI VGA
  ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.8.0-27-generic root=UUID=86841445-ad0e-4655-aecb-deb9f9c5005f ro quiet splash nomodeset
  RelatedPackageVersions:
   linux-restricted-modules-3.8.0-27-generic N/A
   linux-backports-modules-3.8.0-27-generic  N/A
   linux-firmware                            1.106
  SourcePackage: linux
  StagingDrivers: rts5139
  UpgradeStatus: Upgraded to raring on 2013-04-28 (98 days ago)
  dmi.bios.date: 03/14/2013
  dmi.bios.vendor: LENOVO
  dmi.bios.version: 5ECN96WW(V9.01)
  dmi.board.asset.tag: No Asset Tag
  dmi.board.name: INVALID
  dmi.board.vendor: LENOVO
  dmi.board.version: 00000000INVALID
  dmi.chassis.asset.tag: No Asset Tag
  dmi.chassis.type: 10
  dmi.chassis.vendor: LENOVO
  dmi.chassis.version: Lenovo G580
  dmi.modalias: dmi:bvnLENOVO:bvr5ECN96WW(V9.01):bd03/14/2013:svnLENOVO:pn2189:pvrLenovoG580:rvnLENOVO:rnINVALID:rvr00000000INVALID:cvnLENOVO:ct10:cvrLenovoG580:
  dmi.product.name: 2189
  dmi.product.version: Lenovo G580
  dmi.sys.vendor: LENOVO

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