kernel-packages team mailing list archive

[Thomas Moestl <tmoestl@xxxxxxx>]

Hmmm, I don't remember, actually. When I got this machine, I installed from a 14.04 DVD, but immediately updated to 15.10 via 15.04 before I even really started using it. I don't remember it having hung in the few hours I had it run on 14.04 or 15.04 while setting things up, but I could be wrong.
I noticed it pretty much immediately once I had 15.10 running, but it was much rarer then and I did not have time to go bug hunting immediately.

If it helps, however, I can confirm that the issue occurs with linux-
image-extra-3.19.0-31-generic (version 3.19.0-31.36), as well, which is
the latest image that is installed via  linux-image-generic-lts-vivid on
15.10.

Just as an addendum, the machine is stable when booted into Win 8.1,
even under heavy graphics loads such as games, and now is under Ubuntu
as well  with intel_idle.max_cstate=1 , so I believe that hardware
flakiness is unlikely to be the cause (especially since a lot of people
are reporting the same issue, amenable to the same workaround, on a
variety of different BayTrail-based hardware in the above kernel.org bug
report).

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https://bugs.launchpad.net/bugs/1530557

Title:
  Random hard freezes under X on a laptop with Intel BayTrail processor
  (ASUS R752MA), Ubuntu 15.10

Status in linux package in Ubuntu:
  Incomplete

Bug description:
  System freezes hard when working under X, sometimes after minutes,
  sometimes after hours. Usually, but not always, graphics-intensive
  applications like viewing videos will trigger the hangs after a while,
  but they can also (much more rarely) occur when e.g. only an xterm is
  opened and being worked in under Unity.

  The MagicSysReq keys are not functional any more once the hang has
  occurred, there is no information in the logs, and no crash dump can
  be obtained by using the soft or nmi watchdogs, panic_on_oops etc.

  I have tried the latest mainline kernel build from
  http://kernel.ubuntu.com/~kernel-ppa/mainline/?C=N;O=D , linux-
  image-4.4.0-040400rc7-generic_4.4.0-040400rc7.201512272230_amd64.deb
  (4.4-rc7), and the hangs still occur under the same circumstances.

  Some research has led me to
  https://bugzilla.kernel.org/show_bug.cgi?id=109051 , and I believe
  that it describes the exact problem I am experiencing.

  WORKAROUND: Use kernel parameter:
  intel_idle.max_cstate=1

  ProblemType: Bug
  DistroRelease: Ubuntu 15.10
  Package: linux-image-4.2.0-22-generic 4.2.0-22.27
  ProcVersionSignature: Ubuntu 4.2.0-22.27-generic 4.2.6
  Uname: Linux 4.2.0-22-generic x86_64
  ApportVersion: 2.19.1-0ubuntu5
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  tmm        2184 F.... pulseaudio
  CurrentDesktop: Unity
  Date: Sat Jan  2 16:56:51 2016
  HibernationDevice: RESUME=UUID=f079f6d2-d58a-474c-ae48-d903be124a02
  InstallationDate: Installed on 2015-10-21 (72 days ago)
  InstallationMedia: Ubuntu 14.04.3 LTS "Trusty Tahr" - Beta amd64 (20150805)
  MachineType: ASUSTeK COMPUTER INC. X751MA
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.2.0-22-generic root=UUID=dbe91b1d-f01e-4f19-85eb-3877b67143ac ro quiet splash intel_idle.max_cstate=1 vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-4.2.0-22-generic N/A
   linux-backports-modules-4.2.0-22-generic  N/A
   linux-firmware                            1.149.3
  SourcePackage: linux
  UpgradeStatus: Upgraded to wily on 2015-10-23 (71 days ago)
  dmi.bios.date: 08/10/2015
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: X751MA.403
  dmi.board.asset.tag: ATN12345678901234567
  dmi.board.name: X751MA
  dmi.board.vendor: ASUSTeK COMPUTER INC.
  dmi.board.version: 1.0
  dmi.chassis.asset.tag: No Asset Tag
  dmi.chassis.type: 10
  dmi.chassis.vendor: ASUSTeK COMPUTER INC.
  dmi.chassis.version: 1.0
  dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrX751MA.403:bd08/10/2015:svnASUSTeKCOMPUTERINC.:pnX751MA:pvr1.0:rvnASUSTeKCOMPUTERINC.:rnX751MA:rvr1.0:cvnASUSTeKCOMPUTERINC.:ct10:cvr1.0:
  dmi.product.name: X751MA
  dmi.product.version: 1.0
  dmi.sys.vendor: ASUSTeK COMPUTER INC.

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