kernel-packages team mailing list archive

[Joseph Salisbury <joseph.salisbury@xxxxxxxxxxxxx>]

Did this issue occur in a previous version of Ubuntu, or is this a new
issue?

Would it be possible for you to test the latest upstream kernel? Refer
to https://wiki.ubuntu.com/KernelMainlineBuilds . Please test the latest
v3.12 kernel[0].

If this bug is fixed in the mainline kernel, please add the following
tag 'kernel-fixed-upstream'.

If the mainline kernel does not fix this bug, please add the tag:
'kernel-bug-exists-upstream'.

If you are unable to test the mainline kernel, for example it will not boot, please add the tag: 'kernel-unable-to-test-upstream'.
Once testing of the upstream kernel is complete, please mark this bug as "Confirmed".


Thanks in advance.

[0] http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.13-rc2-trusty/

** Changed in: linux (Ubuntu)
   Importance: Undecided => Medium

** Changed in: linux (Ubuntu)
       Status: Confirmed => Incomplete

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https://bugs.launchpad.net/bugs/1256361

Title:
  System is running painfully slow after reboot/starup sometimes

Status in “linux” package in Ubuntu:
  Incomplete

Bug description:
  Every time my computer runs out of battery while being in suspend OR
  crashes after resume from suspend (black screen, won't start properly)
  the system runs painfully slow.

  I can demonstrate this by running a very simple benchmark with cat
  /dev/urandom.

  First result: After a bootup after power failure during suspend

  thonov@thonov-ubuntu:~$ time cat /dev/urandom |head -c 500000000
  >/dev/null

  real	2m54.181s
  user	0m0.308s
  sys	2m54.912s
  thonov@thonov-ubuntu:~$ uname -r
  3.11.0-13-generic

  2nd result: After a shutdown / power-on under normal circumstances:

  thonov@thonov-ubuntu:~$ time cat /dev/urandom |head -c 500000000
  >/dev/null

  real	0m43.797s
  user	0m0.092s
  sys	0m44.036s
  thonov@thonov-ubuntu:~$ uname -r
  3.11.0-13-generic

  I'm attaching a dmesg from both these bootups.

  While I'm having this problem it is insanely slow to use the system.
  Just opening Chrome takes forever and when it's finally opened it is
  also slow browsing. Well, using any app is slow.

  ProblemType: Bug
  DistroRelease: Ubuntu 13.10
  Package: linux-image (not installed)
  ProcVersionSignature: Ubuntu 3.11.0-13.20-generic 3.11.6
  Uname: Linux 3.11.0-13-generic i686
  ApportVersion: 2.12.5-0ubuntu2.1
  Architecture: i386
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  thonov     2267 F.... pulseaudio
  Date: Fri Nov 29 16:36:12 2013
  EcryptfsInUse: Yes
  InstallationDate: Installed on 2012-06-26 (520 days ago)
  InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Release i386 (20120423)
  MachineType: LENOVO 42433ZG
  MarkForUpload: True
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.11.0-13-generic root=UUID=c3c7f36f-ca42-443e-819f-5553fe3d040a ro quiet splash vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-3.11.0-13-generic N/A
   linux-backports-modules-3.11.0-13-generic  N/A
   linux-firmware                             1.116
  SourcePackage: linux
  UpgradeStatus: Upgraded to saucy on 2013-10-24 (35 days ago)
  dmi.bios.date: 07/26/2013
  dmi.bios.vendor: LENOVO
  dmi.bios.version: 8AET64WW (1.44 )
  dmi.board.asset.tag: Not Available
  dmi.board.name: 42433ZG
  dmi.board.vendor: LENOVO
  dmi.board.version: Not Available
  dmi.chassis.asset.tag: No Asset Information
  dmi.chassis.type: 10
  dmi.chassis.vendor: LENOVO
  dmi.chassis.version: Not Available
  dmi.modalias: dmi:bvnLENOVO:bvr8AET64WW(1.44):bd07/26/2013:svnLENOVO:pn42433ZG:pvrThinkPadT520:rvnLENOVO:rn42433ZG:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable:
  dmi.product.name: 42433ZG
  dmi.product.version: ThinkPad T520
  dmi.sys.vendor: LENOVO

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