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[Jsievikorte <1453298@xxxxxxxxxxxxxxxxxx>]

Hi All,

Came across this when hunting random freezes / crashes on Acer B115
laptop. It started with upgrade to ubuntu 15.04 (14.x worked ok, haven't
noted the kernel versions).

http://ubuntuforums.org/showthread.php?t=2284615&p=13313066#post13313066
My original post in here.

OpenSuSE with kernel 4.0.5 seemed to run fine, but it might be that I
looked it at the wrong end, because 15.04 ubuntu crashed only when going
to sleep so that is the thing I tried to track down. 15.10 now crashes
randomly during desktop use - and same happens in OpenSuSE Tumbleweed
with 4.3 kernel.

Crashes seem intermittent, might make days without freeze and then
couple of nights back two freezes in a row, second one just couple of
minutes after reboot. Only load was chromium showing couple of large web
pages when crashes happened. Symptons are quite same described in many
posts, no sysrq possible, only power off works.

I did already try intel_pstate=disable and that made the system freeze
on screensaver after just few minutes of uptime. After that I've booted
with debugging options enabled and fiddled a bit with clock frequency
setting, and haven't managed to crash since - but I'm still only three
days up. Tried to make it crash by playing couple of games and/or HD
videos, no luck so far. But this is to be expected, 15.10 ubuntu could
also run couple of weeks - which makes this painful as there seems to be
no clear way of reproducing the issue.

Just it makes me think that is there something going on with timings at
hardware level? What I did try was to lower the frequency setting just
lightly, with quick testing it didn't seem to matter how much I touched
it. Also I'm a bit puzzled about the setting, is the
/sys/kernel/debug/dri/0/i915_max_freq value in MHz or something else, as
in log it says:

[26873.155419] [drm:valleyview_enable_rps] current GPU freq: 312 MHz (198)
[26873.155420] [drm:valleyview_enable_rps] setting GPU freq to 645 MHz (214)

And I think I saw this high values in log, even if I did set the
frequency value to less than 400. Anyway, I'll update if I found
anything else, this is annoying as it has been going on months now
without a clear clue what is wrong with this laptop :)

-- 
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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