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[Alex Hung <1364748@xxxxxxxxxxxxxxxxxx>]

ACPI spec defines _ROM as "This method is used to get a copy of the
display devices’ ROM data". In this case, it is used to get VBIOS (ex.
VGA's configuration) from ACPI BIOS AML code. As it fails, OS is not
able to get such configuration information.

I tried nvidia-prime and switched between nvidia and intel VGA, and the
switching did happen according to its system indicator, but I am running
glmark2 in both VGA modes in order to see whether the switching is
indeed occurred.

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https://bugs.launchpad.net/bugs/1364748

Title:
  [Lenovo ThinkPad T440p][10de:1290] switching  nvidia graphic card
  raises fwts high failure

Status in HWE Next Project:
  Incomplete
Status in “linux” package in Ubuntu:
  In Progress
Status in “nvidia-prime” package in Ubuntu:
  New

Bug description:
  Lenovo ThinkPad T440p ( CID 201309-14169 ) on Ubuntu 14.04
  3.13.0-24-generic

  ----------------------------------------

  fwts high failures were found as the following:

  klog: HIGH Kernel message: [   27.371715] ACPI Warning: \_SB_.PCI0.PEG_.VID_._DSM: Argument #4 type mismatch - Found [Buffer], ACPI requires [Package] (20131115/nsarguments-95)
  klog: HIGH Kernel message: [   29.882167] ACPI Error: Field [TBF3] at 270336 exceeds Buffer [NULL] size 262144 (bits) (20131115/dsopcode-236)
  klog: HIGH Kernel message: [   29.882172] ACPI Error: Method parse/execution failed [\_SB_.PCI0.PEG_.VID_.GETB] (Node ffff8802333d1960), AE_AML_BUFFER_LIMIT (20131115/psparse-536)
  klog: HIGH Kernel message: [   29.882179] ACPI Error: Method parse/execution failed [\_SB_.PCI0.PEG_.VID_._ROM] (Node ffff8802333d1938), AE_AML_BUFFER_LIMIT (20131115/psparse-536)

  ----------------------------------------

  Steps to reproduce the bug:
  1.on the power-saving mode (intel chip),
  fwts found a klog high failure

  klog: HIGH Kernel message: [   26.704702] ACPI Warning:
  \_SB_.PCI0.PEG_.VID_._DSM: Argument #4 type mismatch - Found [Buffer],
  ACPI requires [Package] (20131115/nsarguments-95)

  by the command
  fwts -q --stdout-summary -r <log file name> klog

  2. switch to the nvidia graphic card via dash → nvidia setting → select nvidia
  3. reboot to make the switching work
  4. use the same fwts command and it will show the high failures. There are 3 more high failures found.

  reproducing rate: 5 out of 5

  ----------------------------------------

  More information:
  This high failiure

  klog: HIGH Kernel message: [   27.371715] ACPI Warning:
  \_SB_.PCI0.PEG_.VID_._DSM: Argument #4 type mismatch - Found [Buffer],
  ACPI requires [Package] (20131115/nsarguments-95)

  was explained in
  LP: #1281966/comments/4

  -----------------------------------------

  
  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: linux-image-3.13.0-24-generic 3.13.0-24.46 [modified: boot/vmlinuz-3.13.0-24-generic]
  ProcVersionSignature: Ubuntu 3.13.0-24.46-generic 3.13.9
  Uname: Linux 3.13.0-24-generic x86_64
  NonfreeKernelModules: nvidia
  ApportVersion: 2.14.1-0ubuntu3
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC1:  ubuntu     1790 F.... pulseaudio
   /dev/snd/controlC0:  ubuntu     1790 F.... pulseaudio
  CurrentDesktop: Unity
  Date: Wed Sep  3 00:15:16 2014
  HibernationDevice: RESUME=UUID=b437ec5c-4a11-4108-a4b7-900f2ea9f312
  InstallationDate: Installed on 2014-08-27 (6 days ago)
  InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140417)
  MachineType: LENOVO 20ANZ03CUS
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-24-generic root=UUID=cb520008-8859-45fa-b8dd-d66a667b1be2 ro rootdelay=60 quiet splash initcall_debug
  RelatedPackageVersions:
   linux-restricted-modules-3.13.0-24-generic N/A
   linux-backports-modules-3.13.0-24-generic  N/A
   linux-firmware                             1.127
  SourcePackage: linux
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 08/20/2013
  dmi.bios.vendor: LENOVO
  dmi.bios.version: GLET34WW (1.09.T05 )
  dmi.board.asset.tag: Not Available
  dmi.board.name: 20ANZ03CUS
  dmi.board.vendor: LENOVO
  dmi.board.version: Not Defined
  dmi.chassis.asset.tag: No Asset Information
  dmi.chassis.type: 10
  dmi.chassis.vendor: LENOVO
  dmi.chassis.version: Not Available
  dmi.modalias: dmi:bvnLENOVO:bvrGLET34WW(1.09.T05):bd08/20/2013:svnLENOVO:pn20ANZ03CUS:pvrThinkPadT440p:rvnLENOVO:rn20ANZ03CUS:rvrNotDefined:cvnLENOVO:ct10:cvrNotAvailable:
  dmi.product.name: 20ANZ03CUS
  dmi.product.version: ThinkPad T440p
  dmi.sys.vendor: LENOVO

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