It looks like nouveau is gpu hanging on boot for some reason.

When you're setting nomodeset, it's disabling nouveau entirely so you're
booting with vesa, which won't give the best graphics.  Anyway, that's
why it works in that case.


** Changed in: xserver-xorg-video-nouveau (Ubuntu)
   Importance: Undecided => Medium

** Changed in: xserver-xorg-video-nouveau (Ubuntu)
       Status: Confirmed => Triaged

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https://bugs.launchpad.net/bugs/1098316

Title:
  Ubuntu crashes on graphical login

Status in “xserver-xorg-video-nouveau” package in Ubuntu:
  Triaged

Bug description:
  Ubuntu crashes on graphical login, unless I use boot option nomodeset
  or acpi=off

  lsb_release -rd
  Description:  Ubuntu Raring Ringtail (development branch)
  Release:      13.04

  jolo@conroe:~$ apt-cache policy xserver-xorg-video-nouveau
  xserver-xorg-video-nouveau:
    Installed: 1:1.0.6-0ubuntu1
    Candidate: 1:1.0.6-0ubuntu1
    Version table:
   *** 1:1.0.6-0ubuntu1 0
          500 http://ftp.snt.utwente.nl/pub/os/linux/ubuntu/ raring/main amd64 
Packages
          100 /var/lib/dpkg/status

  [  533.755903] nouveau  [   PFIFO][0000:01:00.0] still angry after 101 spins, 
halt
  [  612.341956] nouveau E[     DRM] GPU lockup - switching to software fbcon
  [  616.284009] nouveau E[    1152] failed to idle channel 0xcccc0001
  [  618.285327] nouveau E[   PFIFO][0000:01:00.0] channel 3 unload timeout
  [  621.284006] nouveau E[    1152] failed to idle channel 0xcccc0000

  ProblemType: Bug
  DistroRelease: Ubuntu 13.04
  Package: xserver-xorg-video-nouveau 1:1.0.6-0ubuntu1
  ProcVersionSignature: Ubuntu 3.7.0-7.15-generic 3.7.0
  Uname: Linux 3.7.0-7-generic x86_64
  .tmp.unity.support.test.1:

  ApportVersion: 2.8-0ubuntu1
  Architecture: amd64
  CompizPlugins: No value set for 
`/apps/compiz-1/general/screen0/options/active_plugins'
  CompositorRunning: compiz
  Date: Thu Jan 10 21:02:07 2013
  DistUpgraded: Fresh install
  DistroCodename: raring
  DistroVariant: ubuntu
  GraphicsCard:
   NVIDIA Corporation G80 [GeForce 8800 GTS] [10de:0193] (rev a2) (prog-if 00 
[VGA controller])
     Subsystem: Micro-Star International Co., Ltd. Device [1462:8010]
  InstallationDate: Installed on 2013-01-07 (3 days ago)
  InstallationMedia: Ubuntu 13.04 "Raring Ringtail" - Alpha amd64 (20130107)
  MachineType: System manufacturer System Product Name
  MarkForUpload: True
  ProcEnviron:
   TERM=xterm
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.7.0-7-generic 
root=UUID=55da2f7d-3310-4e8b-a53d-ad92b1fdb492 ro debug ignore_loglevel 
nomodeset
  SourcePackage: xserver-xorg-video-nouveau
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 03/09/2009
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: 2104
  dmi.board.asset.tag: To Be Filled By O.E.M.
  dmi.board.name: P5B
  dmi.board.vendor: ASUSTeK Computer INC.
  dmi.board.version: Rev 1.xx
  dmi.chassis.asset.tag: Asset-1234567890
  dmi.chassis.type: 3
  dmi.chassis.vendor: Chassis Manufacture
  dmi.chassis.version: Chassis Version
  dmi.modalias: 
dmi:bvnAmericanMegatrendsInc.:bvr2104:bd03/09/2009:svnSystemmanufacturer:pnSystemProductName:pvrSystemVersion:rvnASUSTeKComputerINC.:rnP5B:rvrRev1.xx:cvnChassisManufacture:ct3:cvrChassisVersion:
  dmi.product.name: System Product Name
  dmi.product.version: System Version
  dmi.sys.vendor: System manufacturer
  version.compiz: compiz 1:0.9.9~daily12.12.05-0ubuntu2
  version.ia32-libs: ia32-libs N/A
  version.libdrm2: libdrm2 2.4.40-1
  version.libgl1-mesa-dri: libgl1-mesa-dri 9.0.1-0ubuntu1
  version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
  version.libgl1-mesa-glx: libgl1-mesa-glx 9.0.1-0ubuntu1
  version.xserver-xorg-core: xserver-xorg-core 2:1.13.1.901-0ubuntu1
  version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.7.3-0ubuntu2
  version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.0.0-0ubuntu1
  version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.20.17-0ubuntu1
  version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 
1:1.0.6-0ubuntu1
  xserver.bootTime: Thu Jan 10 20:58:21 2013
  xserver.configfile: default
  xserver.devices:
   input        Power Button         KEYBOARD, id 6
   input        Power Button         KEYBOARD, id 7
   input        Microsoft Wired Keyboard 600 KEYBOARD, id 8
   input        Microsoft Wired Keyboard 600 KEYBOARD, id 9
   input        Logitech USB-PS/2 Optical Mouse MOUSE, id 10
  xserver.logfile: /var/log/Xorg.0.log
  xserver.outputs:

  xserver.version: 2:1.13.1.901-0ubuntu1

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