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[Bug 1227202] Re: Unexpected freezes Saucy


I did try this kernel the other day and the system did lock up just like
the one in the repository:


The system still locks up even with the latest kernel from the
repository --

 Linux lubuntu 3.11.0-7-generic #14-Ubuntu SMP Mon Sep 16 18:37:27 UTC
2013 x86_64 x86_64 x86_64 GNU/Linux

-- unless zram is turned off.  After about 3 days of usage, I have yet
to encounter a freeze after setting the following:

 sudo swapoff /dev/zram0
 sudo swapoff /dev/zram1
 sudo rmmod zram

With zram on, the system will freeze sooner or later.  Sometime it is
within 15 minutes of cold boot.  Other times, it will go for many hours.

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  Unexpected freezes Saucy

Status in “linux” package in Ubuntu:
  In Progress

Bug description:
  When using desktop-installer with lubuntu there is a freeze at the
  very end (bug 1225429) which also affects desktop-i386 and desktop-
  amd64. There are also unexplained freezes on the system when using it.
  Further tracking down has found
  http://ubuntuforums.org/showthread.php?t=2162655&page=3 and earlier
  today this arrived..

  As for freezing we discovered that since kernel 3.10.6 zram is broken
  which causes freezes and was fixed only completely in 3.12rc1. We
  backported that fixes in Neptune's Kernel I am not sure if the ubuntu
  kernel devs did the same.

  *Von: *Nio Wiklund
  *Gesendet: *Mittwoch, 18. September 2013 15:39

  The links we have also found are  https://lkml.org/lkml/2013/8/12/29
  and  https://lkml.org/lkml/2013/8/19/17

  Disabling zram prevents the freeze in desktop-i386

  My machine specification is http://phillw.net/hardware/aDU4RVzY
  although using the lower RAM (512Mb) has been achieved by KVM
  http://phillw.net/hardware/LuFdGuxP increasing the available RAM to
  1GB does not show this error. It has also now been tested on 'real'
  hardware with 512Mb of RAM and is also showing the freeze (as well as
  with VBox).

  ProblemType: Bug
  DistroRelease: Ubuntu 13.10
  Package: linux-image-3.11.0-7-generic 3.11.0-7.14
  ProcVersionSignature: Ubuntu 3.11.0-7.13-generic 3.11.0
  Uname: Linux 3.11.0-7-generic x86_64
  ApportVersion: 2.12.1-0ubuntu4
  Architecture: amd64
   /dev/snd/controlC0:  phillw     2019 F.... lxpanel
  CRDA: Error: [Errno 2] No such file or directory: 'iw'
  Date: Wed Sep 18 16:13:01 2013
  HibernationDevice: RESUME=UUID=d98ac0ad-5c96-4382-8195-23b44e056358
  InstallationDate: Installed on 2013-06-29 (81 days ago)
  InstallationMedia: Lubuntu 13.10 "Saucy Salamander" - Alpha amd64 (20130628)
  MachineType: Packard Bell EasyNote LJ71
  MarkForUpload: True
  ProcFB: 0 radeondrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.11.0-7-generic root=UUID=69c7aa0f-ccd0-4ac4-8930-e6f0efda9e6b ro quiet splash vt.handoff=7
   linux-restricted-modules-3.11.0-7-generic N/A
   linux-backports-modules-3.11.0-7-generic  N/A
   linux-firmware                            1.114
  SourcePackage: linux
  StagingDrivers: zram
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 09/22/2009
  dmi.bios.vendor: Packard Bell
  dmi.bios.version: V1.03
  dmi.board.asset.tag: Base Board Asset Tag
  dmi.board.name: EasyNote LJ71
  dmi.board.vendor: Packard Bell
  dmi.board.version: V1.03
  dmi.chassis.type: 10
  dmi.chassis.vendor: Packard Bell
  dmi.chassis.version: V1.03
  dmi.modalias: dmi:bvnPackardBell:bvrV1.03:bd09/22/2009:svnPackardBell:pnEasyNoteLJ71:pvrV1.03:rvnPackardBell:rnEasyNoteLJ71:rvrV1.03:cvnPackardBell:ct10:cvrV1.03:
  dmi.product.name: EasyNote LJ71
  dmi.product.version: V1.03
  dmi.sys.vendor: Packard Bell

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