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[Chris Rainey <1503731@xxxxxxxxxxxxxxxxxx>]

Confirming that "intel_idle.max_cstate=1" has solved my complete freeze
issues on Bay Trail running Linux 4.1.13(Slackware64-current(pre-4.2)
formerly running Ubuntu 15.04/15.10 with stock kernels).

Thanx for all the hard-work and long-efforts to see this through!


*** PLEASE CONSIDER MARKING THIS AS A DUPLICATE OF: 

https://bugs.freedesktop.org/show_bug.cgi?id=88012

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https://bugs.launchpad.net/bugs/1503731

Title:
  8086:0f31 Ubuntu 15.04-15.10 freezes totally

Status in linux package in Ubuntu:
  Incomplete

Bug description:
  Behavior:

  Ever since I first installed 15.04 back in April/May on my new DELL
  Inspiron 3646:

  Handle 0x0001, DMI type 1, 27 bytes
  System Information
          Manufacturer: Dell Inc.
          Product Name: Inspiron 3646

  I have experienced frequent(daily/every-other-day)complete
  lockups(cannot even switch to console(Alt-F1,F2,etc.).

  I have determined that the issue is related to the 'i915' driver in
  relation to my GPU:

  00:02.0 VGA compatible controller: Intel Corporation Atom Processor
  Z36xxx/Z37xxx Series Graphics & Display (rev 0e)

  on SoC:

  Handle 0x0004, DMI type 4, 42 bytes
  Processor Information
          Socket Designation: CPU 1
          Type: Central Processor
          Family: Atom
          Manufacturer: Intel(R) Corporation
          Version: Intel(R) Pentium(R) CPU  J2900  @ 2.41GHz
          

  I have gained _significant_ improvements in reliability / stability by
  using various flags / parameters in the i915 module:

  /etc/modprobe.d/i915.conf:

  options i915 semaphores=1

  and / or

  /etc/default/grub:

  GRUB_CMDLINE_LINUX_DEFAULT="quiet intel_pstate=disable"

  and / or

  /usr/share/X11/xorg.conf.d/20-intel.conf:

  Section "Device"
     Identifier "Intel Graphics"
     Driver "intel"
     Option "TearFree" "1"
  EndSection

  and / or

  Disable "Intel Virtualization Technologies" in the BIOS.

  chris@CKR-DKM:~$ lsb_release -rd
  Description:    Ubuntu 15.04
  Release:        15.04

  chris@CKR-DKM:~$ apt-cache policy xorg
  xorg:
    Installed: (none)
    Candidate: 1:7.7+7ubuntu4
    Version table:
       1:7.7+7ubuntu4 0
          500 http://us.archive.ubuntu.com/ubuntu/ vivid/main amd64 Packages

  
  *****************************************************************

  I'm currently using:  intel-linux-graphics-
  installer_1.2.0-0intel1_amd64.deb

  from:  https://01.org/linuxgraphics

  with similar results(maybe a little better than the stock i915 stack
  in 15.04).

  
  *****************************************************************


  ProblemType: Bug
  DistroRelease: Ubuntu 15.04
  Package: xorg (not installed)
  ProcVersionSignature: Ubuntu 3.19.0-30.34-generic 3.19.8-ckt6
  Uname: Linux 3.19.0-30-generic x86_64
  ApportVersion: 2.17.2-0ubuntu1.5
  Architecture: amd64
  CompositorRunning: None
  Date: Wed Oct  7 09:32:47 2015
  DistUpgraded: Fresh install
  DistroCodename: vivid
  DistroVariant: ubuntu
  ExtraDebuggingInterest: Yes
  GraphicsCard:
   Intel Corporation Atom Processor Z36xxx/Z37xxx Series Graphics & Display [8086:0f31] (rev 0e) (prog-if 00 [VGA controller])
     Subsystem: Dell Device [1028:068d]
  InstallationDate: Installed on 2015-09-17 (19 days ago)
  InstallationMedia: Ubuntu-Server 15.04 "Vivid Vervet" - Release amd64 (20150422)
  LightdmGreeterLog:
   ** (lightdm-gtk-greeter:1005): WARNING **: [PIDs] Failed to execute command: upstart

   ** (lightdm-gtk-greeter:1005): WARNING **: Failed to load user image: Failed to open file '/home/chris/.face': No such file or directory
  MachineType: Dell Inc. Inspiron 3646
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.19.0-30-generic.efi.signed root=UUID=ef22be35-6f79-4356-be42-2689d1de0378 ro quiet
  SourcePackage: xorg
  UdevLog: Error: [Errno 2] No such file or directory: '/var/log/udev'
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 08/17/2015
  dmi.bios.vendor: Dell Inc.
  dmi.bios.version: A09
  dmi.board.name: 0V6D8J
  dmi.board.vendor: Dell Inc.
  dmi.board.version: A00
  dmi.chassis.type: 3
  dmi.chassis.vendor: Dell Inc.
  dmi.chassis.version: A09
  dmi.modalias: dmi:bvnDellInc.:bvrA09:bd08/17/2015:svnDellInc.:pnInspiron3646:pvr:rvnDellInc.:rn0V6D8J:rvrA00:cvnDellInc.:ct3:cvrA09:
  dmi.product.name: Inspiron 3646
  dmi.sys.vendor: Dell Inc.
  version.compiz: compiz N/A
  version.ia32-libs: ia32-libs N/A
  version.libdrm2: libdrm2 2.4.60-2
  version.libgl1-mesa-dri: libgl1-mesa-dri 10.5.9-2ubuntu1~vivid2
  version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
  version.libgl1-mesa-glx: libgl1-mesa-glx 10.5.9-2ubuntu1~vivid2
  version.xserver-xorg-core: xserver-xorg-core 2:1.17.1-0ubuntu3.1
  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~exp1ubuntu2.2
  version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.11-1ubuntu2build1
  xserver.bootTime: Tue Oct  6 20:05:51 2015
  xserver.configfile: default
  xserver.errors:

  xserver.logfile: /var/log/Xorg.0.log
  xserver.outputs:
   product id                                 990
   vendor                                     ACR
  xserver.version: 2:1.17.1-0ubuntu3.1

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