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[Bug 1258686] Re: Faulty laptop battery or AC throws system cache for a loop


Yes it occurred in the previous version and yes, I have tried about a
dozen other kernels.

I would rather do some triage to actully identify the issue instead of
getting in an endless loop of trying different kernels in the hope that
some unrelated patch will have an affect.

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

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  Faulty laptop battery or AC throws system cache for a loop

Status in “linux” package in Ubuntu:

Bug description:
  After a random period of time after a fresh boot, the system cache
  gets corrupted. This is shown by hdparm -T.

  Before system cache corruption:
   Timing cached reads:   1804 MB in  2.00 seconds = 902.88 MB/sec

  After system cache corruption:
   Timing cached reads:   258 MB in  2.00 seconds = 129.10 MB/sec

  Either the system battery or the AC adaptor is not functioning
  correctly, the Dell bios at times indicates that the AC adaptor is not
  a valid Dell product, though it is. In any case, the battery does not
  charge, but remains at 0%.

  ProblemType: Bug
  DistroRelease: Ubuntu 13.10
  Package: linux-image-3.11.0-12-generic 3.11.0-12.19
  ProcVersionSignature: Ubuntu 3.11.0-12.19-generic 3.11.3
  Uname: Linux 3.11.0-12-generic i686
  ApportVersion: 2.12.5-0ubuntu2.1
  Architecture: i386
   /dev/snd/controlC0:  asp        1931 F.... pulseaudio
  Date: Fri Dec  6 18:45:58 2013
  HibernationDevice: RESUME=UUID=08003f81-dc4b-4697-adb9-c4f28291be17
  InstallationDate: Installed on 2013-12-06 (0 days ago)
  InstallationMedia: Ubuntu 13.10 "Saucy Salamander" - Release i386 (20131016.1)
  MachineType: Dell Inc. Latitude D420
  MarkForUpload: True
   Socket 0:
     no product info available
   Socket 0:
     no card
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.11.0-12-generic root=UUID=ecd26c7d-0cb5-446e-a2ca-e4fefc0c0fd0 ro quiet splash processor.ignore_ppc=1 vt.handoff=7
   linux-restricted-modules-3.11.0-12-generic N/A
   linux-backports-modules-3.11.0-12-generic  N/A
   linux-firmware                             1.116
   0: phy0: Wireless LAN
   	Soft blocked: no
   	Hard blocked: no
  SourcePackage: linux
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 02/02/2008
  dmi.bios.vendor: Dell Inc.
  dmi.bios.version: A06
  dmi.board.name: 0TJ984
  dmi.board.vendor: Dell Inc.
  dmi.chassis.type: 8
  dmi.chassis.vendor: Dell Inc.
  dmi.modalias: dmi:bvnDellInc.:bvrA06:bd02/02/2008:svnDellInc.:pnLatitudeD420:pvr:rvnDellInc.:rn0TJ984:rvr:cvnDellInc.:ct8:cvr:
  dmi.product.name: Latitude D420
  dmi.sys.vendor: Dell Inc.

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