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[Bug 1114856] Re: power button not working using non-default kernel parameters, when Samsung laptop is booted in CSM mode; works fine in EFI mode


Christopher: my Samsung notebook model is NP700Z5C-S03CA.

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  power button not working using non-default kernel parameters, when
  Samsung laptop is booted in CSM mode; works fine in EFI mode

Status in “linux” package in Ubuntu:

Bug description:
  When my Samsung NP700Z5C is booted in the CSM (BIOS compatibility)
  mode, pressing the power button has no effect. There is no scancode
  per "/lib/udev/keymap". However, when the same laptop is booted in the
  UEFI mode, the power button works perfectly fine.

  The problem is quite annoying because if the laptop is accidentally
  sent to sleep or hibernate mode, there is no return back from
  sleep/hibernate. Pressing the power button has no effect. The laptop
  can be turned off by long-pressing the power button, with the
  collateral loss of all unsaved data.

  ProblemType: Bug
  DistroRelease: Ubuntu 12.10
  Package: linux-image-3.5.0-23-generic 3.5.0-23.35
  ProcVersionSignature: Ubuntu 3.5.0-23.35-generic
  Uname: Linux 3.5.0-23-generic x86_64
  ApportVersion: 2.6.1-0ubuntu10
  Architecture: amd64
   /dev/snd/controlC0:  val        2259 F.... pulseaudio
  Date: Sun Feb  3 22:56:12 2013
  HibernationDevice: RESUME=UUID=96bef07a-40d3-4067-8c9a-211548fc7184
  InstallationDate: Installed on 2013-01-17 (17 days ago)
  InstallationMedia: Ubuntu 12.10 "Quantal Quetzal" - Release amd64 (20121017.5)
  MachineType: SAMSUNG ELECTRONICS CO., LTD. 700Z3C/700Z5C
  MarkForUpload: True
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.5.0-23-generic root=UUID=ef3ff468-e0b5-43db-ac4c-447c73805778 ro quiet splash acpi=noirq vt.handoff=7
   linux-restricted-modules-3.5.0-23-generic N/A
   linux-backports-modules-3.5.0-23-generic  N/A
   linux-firmware                            1.95
  SourcePackage: linux
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 09/19/2012
  dmi.bios.vendor: Phoenix Technologies Ltd.
  dmi.bios.version: P04ABJ
  dmi.board.asset.tag: Base Board Asset Tag
  dmi.board.name: NP700Z5C-S03CA
  dmi.board.vendor: SAMSUNG ELECTRONICS CO., LTD.
  dmi.board.version: FAB1
  dmi.chassis.asset.tag: No Asset Tag
  dmi.chassis.type: 9
  dmi.chassis.vendor: SAMSUNG ELECTRONICS CO., LTD.
  dmi.chassis.version: 0.1
  dmi.modalias: dmi:bvnPhoenixTechnologiesLtd.:bvrP04ABJ:bd09/19/2012:svnSAMSUNGELECTRONICSCO.,LTD.:pn700Z3C/700Z5C:pvr0.1:rvnSAMSUNGELECTRONICSCO.,LTD.:rnNP700Z5C-S03CA:rvrFAB1:cvnSAMSUNGELECTRONICSCO.,LTD.:ct9:cvr0.1:
  dmi.product.name: 700Z3C/700Z5C
  dmi.product.version: 0.1
  dmi.sys.vendor: SAMSUNG ELECTRONICS CO., LTD.

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