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[richard jones <richard.jones.1952@xxxxxxxxx>]

Additional info. Possibly irrelevant.

Using Firefox I have noticed a screen corruption that seems to occur
after some time idle. The same problem occurred on Ubuntu 14.04. It
suggests to me that somewhere deep in the graphics driver something is
amiss.

To use the Google Chrome browser I have had to un-check 'Use hardware
acceleration when available' to prevent the browser from crashing.

Attached is the dmesg output from a successful boot of 3.19.0-16-generic
which may be helpful. Whether booting successfully or not just before
the grub menu the following is reported: ACPI PCC Probe Failed. This is
apparently benign.



** Attachment added: "Output of dmesg command"
   https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1453302/+attachment/4394792/+files/dmesg.txt

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https://bugs.launchpad.net/bugs/1453302

Title:
  Linux kernel freeze (it seems in current/3.19.0-17) on Dell Inspiron
  1525

Status in xorg package in Ubuntu:
  Confirmed

Bug description:
  First READ about how I deceived ubuntu-bug!

  I'm not sure it matters or what info ubuntu-bug collects, but I didn't
  do "ubuntu-bug linux" since it gave an error:

  "Problem in linux-image-3.19.0-13-generic

  The problem cannot be reported:

  This is not an official Ubuntu package. Please remove any third party
  package and try again."

  I did ubuntu-bug Xorg just to get some collection of info, NOT saying
  xorg is the fault.

  Note that this bug report is NOT about that kernel but the most
  current (and maybe one or two others).

  Yesterday I wasn't having this problem with kernels (at least not the
  newest one I had not installed.. I may have had different problems, do
  not believe hardware broken though).

  $ ls -lrt /boot/initrd.img-3.1*
  -rw-r--r-- 1 root root 19976179 apr 10 17:20 /boot/initrd.img-3.13.0-47-generic
  -rw-r--r-- 1 root root 21779681 apr 11 14:54 /boot/initrd.img-3.19.0-13-generic
  -rw-r--r-- 1 root root 21782845 apr 19 13:54 /boot/initrd.img-3.19.0-15-generic
  -rw-r--r-- 1 root root 21733320 maí  8 20:26 /boot/initrd.img-3.19.0-15-lowlatency
  -rw-r--r-- 1 root root 21780289 maí  8 21:04 /boot/initrd.img-3.19.0-17-generic

  I believe I've been running 3.19.0-15-generic for the last few days. I
  just run the most recent one (usually - but not now because of the
  problems below).

  Today (this evening) I upgraded some stuff including the kernel.
  3.19.0-17 does not boot up. I've tried several times and get a blank
  screen. I may have gotten something else, a splash-screen (not as far
  as login-screen), on the first try. DO not count on that as I may
  misremember.

  Then booting into 3.19.0-15-generic I could log in, so it seems the
  kernel above is the problem. Note I also upgraded more, say
  networking. AND now while I can log in, that kernel quickly froze
  (twice just after starting Chrome w/lots of tabs) - in a way I've
  never seen - the CAPS LOCK and the light to the RIGHT (NOT NUM LOCK to
  the left) where blinking in sync. I may have forgotten (or not?) to
  try a virtual terminal as this seemed a sure indication that something
  was wrong.

  [I also booted into just-installed 3.19.0-15-lowlatency and got the
  blinking lights.]

  Then I booted into 3.19.0-13 and am now for a much longer time in
  Chrome, so far no freeze..

  [I was doing apt-get autoclean today, deleting kernels, so maybe I'm
  wrong about the exact version of the kernel I was running without
  problems, but at least all the info on kernels that do not work are
  right.]

  ProblemType: Bug
  DistroRelease: Ubuntu 15.04
  Package: xorg 1:7.7+7ubuntu4
  ProcVersionSignature: Ubuntu 3.19.0-13.13-generic 3.19.3
  Uname: Linux 3.19.0-13-generic x86_64
  NonfreeKernelModules: wl
  .tmp.unity.support.test.0:
   
  ApportVersion: 2.17.2-0ubuntu1
  Architecture: amd64
  CompositorRunning: None
  CurrentDesktop: Unity
  Date: Fri May  8 21:50:41 2015
  DistUpgraded: 2015-04-06 16:46:01,057 DEBUG enabling apt cron job
  DistroCodename: vivid
  DistroVariant: ubuntu
  ExtraDebuggingInterest: Yes
  GpuHangFrequency: Continuously
  GpuHangReproducibility: Yes, I can easily reproduce it
  GpuHangStarted: Today
  GraphicsCard:
   
  InstallationDate: Installed on 2014-08-21 (260 days ago)
  InstallationMedia: Ubuntu 14.04.1 LTS "Trusty Tahr" - Release amd64 (20140722.2)
  MachineType: Dell Inc. Inspiron 1525
  ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.19.0-13-generic root=/dev/mapper/ubuntu--vg-root ro quiet splash vt.handoff=7
  SourcePackage: xorg
  Symptom: display
  Title: Xorg freeze
  UnitySupportTest: Error: [Errno 12] Cannot allocate memory
  UpgradeStatus: Upgraded to vivid on 2015-04-06 (32 days ago)
  dmi.bios.date: 10/27/2009
  dmi.bios.vendor: Dell Inc.
  dmi.bios.version: A17
  dmi.board.name: 0U990C
  dmi.board.vendor: Dell Inc.
  dmi.chassis.type: 8
  dmi.chassis.vendor: Dell Inc.
  dmi.modalias: dmi:bvnDellInc.:bvrA17:bd10/27/2009:svnDellInc.:pnInspiron1525:pvr:rvnDellInc.:rn0U990C:rvr:cvnDellInc.:ct8:cvr:
  dmi.product.name: Inspiron 1525
  dmi.sys.vendor: Dell Inc.
  version.compiz: compiz 1:0.9.12.1+15.04.20150410.1-0ubuntu1
  version.ia32-libs: ia32-libs N/A
  version.libdrm2: libdrm2 2.4.60-2
  version.libgl1-mesa-dri: libgl1-mesa-dri 10.5.2-0ubuntu1
  version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
  version.libgl1-mesa-glx: libgl1-mesa-glx 10.5.2-0ubuntu1
  version.xserver-xorg-core: xserver-xorg-core 2:1.17.1-0ubuntu3
  version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.9.0-1ubuntu2
  version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.5.0-1ubuntu2
  version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.917-1~exp1ubuntu2build1
  version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.11-1ubuntu2build1
  xserver.bootTime: Fri May  8 21:43:05 2015
  xserver.configfile: default
  xserver.errors:
   
  xserver.logfile: /var/log/Xorg.0.log
  xserver.outputs:
   product id                               12631 
   vendor                                     SEC
  xserver.version: 2:1.17.1-0ubuntu3

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