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[Lito <lito@xxxxxxxxxx>]

apport information

** Attachment added: "ProcModules.txt"
   https://bugs.launchpad.net/bugs/1346096/+attachment/4158787/+files/ProcModules.txt

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https://bugs.launchpad.net/bugs/1346096

Title:
  [drm:init_ring_common] *ERROR* render ring initialization failed

Status in “linux” package in Ubuntu:
  Confirmed

Bug description:
  After last apt-get dist-upgrade my computer can not start with a
  graphic environment. It start but it's freeze in login screen (cursor
  blink not blink, it's all screen locked).

  I only can login into my Ubuntu from Grub > Advanced options > resume.

  Computer: Toshiba Satellite Pro U400-182 with Intel graphic card
  (Intel GM45 Chipset).

  Ubuntu version: Ubuntu 14.10 Utopic Unicorn (development branch)

  Kernel: Linux 3.16.0-4-generic #9-Ubuntu SMP Mon Jul 14 11:55:55 UTC
  2014 x86_64 x86_64 x86_64 GNU/Linux

  Error in syslog is:

  Jul 18 11:00:14 lito-Ubuntu kernel: [    2.420468] [drm:init_ring_common] *ERROR* render ring initialization failed ctl 0001f001 (valid? 1) head 00000304 tail 00000000 start 00503000 [expected 00503000]
  Jul 18 11:00:14 lito-Ubuntu kernel: [    2.420478] [drm:i915_gem_init] *ERROR* Failed to initialize GPU, declaring it wedged

  Xorg log:

  [    11.900] (II) intel: Driver for Intel(R) Integrated Graphics Chipsets:
          i810, i810-dc100, i810e, i815, i830M, 845G, 854, 852GM/855GM, 865G,
          915G, E7221 (i915), 915GM, 945G, 945GM, 945GME, Pineview GM,
          Pineview G, 965G, G35, 965Q, 946GZ, 965GM, 965GME/GLE, G33, Q35, Q33,
          GM45, 4 Series, G45/G43, Q45/Q43, G41, B43
  [    11.901] (II) intel: Driver for Intel(R) HD Graphics: 2000-5000
  [    11.901] (II) intel: Driver for Intel(R) Iris(TM) Graphics: 5100
  [    11.901] (II) intel: Driver for Intel(R) Iris(TM) Pro Graphics: 5200
  [    11.901] (II) modesetting: Driver for Modesetting Kernel Drivers: kms
  [    11.901] (II) FBDEV: driver for framebuffer: fbdev
  [    11.901] (II) VESA: driver for VESA chipsets: vesa
  [    11.901] (++) using VT number 7

  [    11.927] (EE) open /dev/dri/card0: No such file or directory
  [    11.927] (WW) Falling back to old probe method for modesetting
  [    11.927] (EE) open /dev/dri/card0: No such file or directory

  No errors in dmesg

  Related intel packages:

  ii  intel-gpu-tools        1.7-1            amd64            tools for debugging the Intel graphics driver
  ii  libdrm-intel1:amd64    2.4.54-1         amd64            Userspace interface to intel-specific kernel DRM
  ii  libdrm-intel1:i386     2.4.54-1         i386             Userspace interface to intel-specific kernel DRM
  un  libva-intel-vaapi-driv <none>           <none>           (no description available)
  ii  xserver-xorg-video-int 2:2.99.910-0ubun amd64            X.Org X server -- Intel i8xx, i9xx display driver

  Thanks in advance.
  --- 
  ApportVersion: 2.14.4-0ubuntu2
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/pcmC0D0c:   lito       5855 F...m pulseaudio
   /dev/snd/pcmC0D0p:   lito       5855 F...m pulseaudio
   /dev/snd/controlC0:  lito       5855 F.... pulseaudio
   /dev/snd/seq:        timidity   3621 F.... timidity
  DistroRelease: Ubuntu 14.10
  HibernationDevice: RESUME=UUID=fca42103-06f9-4fcd-bbca-9e8aba068dad
  InstallationDate: Installed on 2012-07-10 (740 days ago)
  InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Release amd64 (20120425)
  MachineType: TOSHIBA Satellite Pro U400
  Package: linux (not installed)
  ProcEnviron:
   LANGUAGE=en_US
   TERM=xterm
   PATH=(custom, no user)
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  ProcFB:
   
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.16.0-4-generic root=UUID=3a477584-a099-4e62-879e-855c5aed40c3 ro recovery nomodeset
  ProcVersionSignature: Ubuntu 3.16.0-4.9-generic 3.16.0-rc5
  PulseList:
   Error: command ['pacmd', 'list'] failed with exit code 1: Home directory not accessible: Permission denied
   No PulseAudio daemon running, or not running as session daemon.
  RelatedPackageVersions:
   linux-restricted-modules-3.16.0-4-generic N/A
   linux-backports-modules-3.16.0-4-generic  N/A
   linux-firmware                            1.132
  Tags:  utopic
  Uname: Linux 3.16.0-4-generic x86_64
  UpgradeStatus: Upgraded to utopic on 2013-10-16 (277 days ago)
  UserGroups:
   
  _MarkForUpload: True
  dmi.bios.date: 10/26/2010
  dmi.bios.vendor: TOSHIBA
  dmi.bios.version: V5.00
  dmi.board.name: Satellite Pro U400
  dmi.board.vendor: TOSHIBA
  dmi.board.version: Not Applicable
  dmi.chassis.asset.tag: No Asset Tag
  dmi.chassis.type: 10
  dmi.chassis.vendor: TOSHIBA
  dmi.chassis.version: N/A
  dmi.modalias: dmi:bvnTOSHIBA:bvrV5.00:bd10/26/2010:svnTOSHIBA:pnSatelliteProU400:pvrPSU45E-01D015CE:rvnTOSHIBA:rnSatelliteProU400:rvrNotApplicable:cvnTOSHIBA:ct10:cvrN/A:
  dmi.product.name: Satellite Pro U400
  dmi.product.version: PSU45E-01D015CE
  dmi.sys.vendor: TOSHIBA

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