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[Jbmacbrodie-m <1453298@xxxxxxxxxxxxxxxxxx>]

I've been running several days without a freeze on my 4.2.6 kernel.  I
simply added intel_idle.max_cstate=1 to my kernel arguments, no other
power arguments, and no more setting GPU frequency caps.

intel_idle.max_cstate=0 was effective too, but my system ran warm (not
hot) when idle.  At max_cstate=1 the case temperature seems normal to
me.

I suspect that the cost of this work-around would be less battery run
time.  But until the T100CHI has full hardware support in linux (no
sound, no bluetooth...), I'm tethered to a powered hub anyway.

I've also tested versions of 4.1.13, 4.2.6, 4.3, even 4.4-rc1 without
obvious side-effects.  4.4rc2 did freeze within minutes of booting, but
4.4-rcx has too many regressions (no wifi even on a dongle) to take that
freeze seriously.

I also tried max_cstate=2 on my Dell laptop (baytrail) but that seemed
to trigger a "not quite" freeze during a kernel build (fan speed
malfunction typical of a freeze, but the build finished successfully.)
The subsequent power down crashed and the next boot was extremely
difficult to start (press hold repeat).  I'm not going to try the
remaining max cstates 3-6!

This might suggest the freeze lies in handling cstates 2-6 starting
after kernel-3.16.7.  But that assumes this bandaid lasts more than
another week.

-- 
You received this bug notification because you are a member of Desktop
Packages, which is subscribed to xserver-xorg-video-intel in Ubuntu.
https://bugs.launchpad.net/bugs/1453298

Title:
  8086:0f31 Xubuntu freeze once a day

Status in xf86-video-intel:
  Confirmed
Status in xserver-xorg-video-intel package in Ubuntu:
  Triaged

Bug description:
  Xubuntu Vivid crashes once a day with Intel Celeron J1900 / HD
  Graphics, mainly when watching videos and more rarely during routine
  tasks like surfing on firefox or during a skype call

  - 00:02.0 VGA compatible controller [0300]: Intel Corporation Atom Processor
  Z36xxx/Z37xxx Series Graphics & Display [8086:0f31] (rev 0e)

  I think it may be related with this bug https://bugs.freedesktop.org/show_bug.cgi?id=88012 (found via https://bbs.archlinux.org/viewtopic.php?id=195736 i have the same config but another distro)
  I have tried to set "NoAccel" option to xorg conf file to true but same thing ...

  ProblemType: Bug
  DistroRelease: Ubuntu 15.04
  Package: xserver-xorg-video-intel 2:2.99.917-1~exp1ubuntu2.1
  ProcVersionSignature: Ubuntu 3.19.0-16.16-generic 3.19.3
  Uname: Linux 3.19.0-16-generic x86_64
  ApportVersion: 2.17.2-0ubuntu1
  Architecture: amd64
  CurrentDesktop: XFCE
  Date: Sat May  9 00:11:14 2015
  InstallationDate: Installed on 2015-05-02 (6 days ago)
  InstallationMedia: Xubuntu 15.04 "Vivid Vervet" - Release amd64 (20150422.1)
  SourcePackage: xserver-xorg-video-intel
  UpgradeStatus: No upgrade log present (probably fresh install)
  --- 
  ApportVersion: 2.17.2-0ubuntu1
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  steve      1530 F.... pulseaudio
   /dev/snd/controlC1:  steve      1530 F.... pulseaudio
  CurrentDesktop: XFCE
  DistroRelease: Ubuntu 15.04
  HibernationDevice: RESUME=UUID=fdcd8774-2dc2-4a6b-8fa8-9d3c6baa07a9
  InstallationDate: Installed on 2015-05-02 (7 days ago)
  InstallationMedia: Xubuntu 15.04 "Vivid Vervet" - Release amd64 (20150422.1)
  IwConfig:
   eth0      no wireless extensions.
   
   lo        no wireless extensions.
  MachineType: MEDION B269
  Package: xserver-xorg-video-intel 2:2.99.917-1~exp1ubuntu2.1
  PackageArchitecture: amd64
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.19.0-16-generic.efi.signed root=UUID=c1ef472e-75c1-4e99-9d2d-d8c5bdc94414 ro noprompt quiet splash vt.handoff=7
  ProcVersionSignature: Ubuntu 3.19.0-16.16-generic 3.19.3
  RelatedPackageVersions:
   linux-restricted-modules-3.19.0-16-generic N/A
   linux-backports-modules-3.19.0-16-generic  N/A
   linux-firmware                             1.143
  RfKill:
   
  Tags:  vivid vivid
  UdevLog: Error: [Errno 2] Aucun fichier ou dossier de ce type: '/var/log/udev'
  Uname: Linux 3.19.0-16-generic x86_64
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo
  _MarkForUpload: True
  dmi.bios.date: 09/26/2014
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: BTLTW08.110
  dmi.board.asset.tag: To be filled by O.E.M.
  dmi.board.name: BTDD-LT
  dmi.board.vendor: MEDION
  dmi.board.version: 1.0
  dmi.chassis.asset.tag: To Be Filled By O.E.M.
  dmi.chassis.type: 3
  dmi.chassis.vendor: MEDION
  dmi.chassis.version: To Be Filled By O.E.M.
  dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrBTLTW08.110:bd09/26/2014:svnMEDION:pnB269:pvr1.0:rvnMEDION:rnBTDD-LT:rvr1.0:cvnMEDION:ct3:cvrToBeFilledByO.E.M.:
  dmi.product.name: B269
  dmi.product.version: 1.0
  dmi.sys.vendor: MEDION

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