kernel-packages team mailing list archive

["Christopher M. Penalver" <christopher.m.penalver@xxxxxxxxx>]

slumbergod, could you please test the latest mainline kernel via
http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.15-rc5-utopic/ and
advise to the results?

** Tags added: regression-release

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https://bugs.launchpad.net/bugs/1320554

Title:
  [Samsung NP350E5C-A02AU] Suspend hang with blank screen on lid open

Status in “linux” package in Ubuntu:
  Incomplete

Bug description:
  I'm using a Samsung NP350E5C laptop and I've been having strange
  issues. I gave up on Xubuntu 13.10 and went back to Xubuntu 13.04
  until Xubuntu 14.04 LTS came out. I'd hoped that the strange issues
  had been resolved but since doing a clean install I have been dogged
  by weird issues.

  Here's what is causing me grief at the moment. I leave my laptop on
  24/7 and just close the lid when I am away from the machine. I go into
  the system's power settings to disable suspend and hibernation so that
  closing the lid does does nothing. With the kernel that 14.04 shipped
  with it was as though those settings were completely ignored. I'd
  close the lid and when I opened it again, there was a blank screen and
  I was unable to do anything at all, not even start an alternative log
  in. The only option was to hold the power button until the machine
  ungracefully turned off.

  I then applied some hacks I found on line to permanently disable
  hibernation and suspend. I've also installed all the newer kernels as
  they have been offered in synaptic. The problem changed to being
  **intermittent** - my system would randomly hang when I opened the
  lid.

  With the latest two kernels (including the 27 one that just came out)
  it is now happening **more often**! I'll wake up in the morning, open
  my laptop and there's the blank screen with no way to wake the system
  up.

  I wonder if there is something strange with Samsung laptops and the
  kernels at the moment. I have to add the acpi_vendor backlight tweak
  to get the brightness working correctly. And for the first  kernel
  releases under 14.04 my usb wireless mouse would not be recognised
  after a reboot -- I'd have to unplug the transmitter then plug it in
  again.

  I'm still experiencing random system slow downs where my machine slows
  to a crawl. Trying to move the mouse across the screen would take 5
  mins in little jumps and starts, with no mouse clicks being
  registered.

  Looking on the forums
  (http://ubuntuforums.org/showthread.php?t=2224455) I see I am not
  alone and it has been suggested I try a mainline lowlatency kernel
  which as of today I will try.

  I am happy to try any suggestions to help resolve this because this is
  a good machine and it was frustrating having to give up on ubuntu
  13.10 and stay with the older, more dependable versions.

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: linux-image-3.13.0-27-generic 3.13.0-27.50
  ProcVersionSignature: Ubuntu 3.13.0-27.50-generic 3.13.11
  Uname: Linux 3.13.0-27-generic x86_64
  ApportVersion: 2.14.1-0ubuntu3.2
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  slumbergod   2145 F.... pulseaudio
  CurrentDesktop: XFCE
  Date: Sun May 18 09:14:41 2014
  EcryptfsInUse: Yes
  InstallationDate: Installed on 2014-04-18 (29 days ago)
  InstallationMedia: Xubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140414)
  MachineType: SAMSUNG ELECTRONICS CO., LTD. 350V5C/351V5C/3540VC/3440VC
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-27-generic.efi.signed root=UUID=7ef0aef5-c4f9-45fb-b729-95b463a492d6 ro quiet splash acpi_backlight=vendor vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-3.13.0-27-generic N/A
   linux-backports-modules-3.13.0-27-generic  N/A
   linux-firmware                             1.127.2
  SourcePackage: linux
  StagingDrivers: rts5139
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 07/04/2013
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: P09ABE
  dmi.board.asset.tag: Base Board Asset Tag
  dmi.board.name: NP350E5C-A02AU
  dmi.board.vendor: SAMSUNG ELECTRONICS CO., LTD.
  dmi.board.version: BOARD REVISION 00
  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:bvnAmericanMegatrendsInc.:bvrP09ABE:bd07/04/2013:svnSAMSUNGELECTRONICSCO.,LTD.:pn350V5C/351V5C/3540VC/3440VC:pvrP09ABE.012.CP:rvnSAMSUNGELECTRONICSCO.,LTD.:rnNP350E5C-A02AU:rvrBOARDREVISION00:cvnSAMSUNGELECTRONICSCO.,LTD.:ct9:cvr0.1:
  dmi.product.name: 350V5C/351V5C/3540VC/3440VC
  dmi.product.version: P09ABE.012.CP
  dmi.sys.vendor: SAMSUNG ELECTRONICS CO., LTD.

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