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[Vincent <vdavy.mobile@xxxxxxxxx>]

apport information

** Attachment added: "UdevDb.txt"
   https://bugs.launchpad.net/bugs/1455870/+attachment/4398960/+files/UdevDb.txt

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https://bugs.launchpad.net/bugs/1455870

Title:
  Suspend to RAM freeze when wawking up with linux image 3.19.0-16

Status in linux package in Ubuntu:
  Incomplete

Bug description:
  Hi all,

  I noticed with my laptop samsung r525 running a fresh install of
  kubuntu 15.04 that if I close the screen, the computer goes to suspend
  to RAM but when I try to wake it up, the computer starts again but the
  screen does not turn on. Nothing is displayed and the screen remains
  turned off, including backlights (this is diferent from having
  backlights on again a blackscreen displayed on screen).

  I can reproduce the same behaviour by using the pm-suspend command
  from shell, or clicking "suspend to ram" into the exit menu.

  If I boot from the 3.19.0-15 kernel, everything works properly. I
  tried another kernel picked up from here http://kernel.ubuntu.com
  /~kernel-ppa/mainline/?C=N;O=D following this wiki page
  https://wiki.ubuntu.com/Kernel/MainlineBuilds?action=show&redirect=KernelMainlineBuilds
  (respectfully the v4.1-rc3-unstable and v4.1-rc2-vivid and I got the
  same problem each time.

  What is going wrong ?
  --- 
  ApportVersion: 2.17.2-0ubuntu1
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  ubuntu     2786 F.... pulseaudio
   /dev/snd/controlC1:  ubuntu     2786 F.... pulseaudio
  CasperVersion: 1.360
  CurrentDesktop: Unity
  DistroRelease: Ubuntu 15.04
  LiveMediaBuild: Ubuntu 15.04 "Vivid Vervet" - Release amd64 (20150422)
  MachineType: SAMSUNG ELECTRONICS CO., LTD. R425/R525
  Package: linux (not installed)
  ProcEnviron:
   TERM=xterm
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=fr_FR.UTF-8
   SHELL=/bin/bash
  ProcFB: 0 radeondrmfb
  ProcKernelCmdLine: noprompt cdrom-detect/try-usb=true persistent file=/cdrom/preseed/username.seed boot=casper initrd=/casper/initrd.lz quiet splash --- maybe-ubiquity
  ProcVersionSignature: Ubuntu 3.19.0-15.15-generic 3.19.3
  RelatedPackageVersions:
   linux-restricted-modules-3.19.0-15-generic N/A
   linux-backports-modules-3.19.0-15-generic  N/A
   linux-firmware                             1.143
  Tags:  vivid
  UdevLog: Error: [Errno 2] No such file or directory: '/var/log/udev'
  Uname: Linux 3.19.0-15-generic x86_64
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo
  _MarkForUpload: True
  dmi.bios.date: 04/10/2010
  dmi.bios.vendor: Phoenix Technologies Ltd.
  dmi.bios.version: 03NS
  dmi.board.name: R425/R525
  dmi.board.vendor: SAMSUNG ELECTRONICS CO., LTD.
  dmi.board.version: Not Applicable
  dmi.chassis.asset.tag: No Asset Tag
  dmi.chassis.type: 10
  dmi.chassis.vendor: SAMSUNG ELECTRONICS CO., LTD.
  dmi.chassis.version: N/A
  dmi.modalias: dmi:bvnPhoenixTechnologiesLtd.:bvr03NS:bd04/10/2010:svnSAMSUNGELECTRONICSCO.,LTD.:pnR425/R525:pvrNotApplicable:rvnSAMSUNGELECTRONICSCO.,LTD.:rnR425/R525:rvrNotApplicable:cvnSAMSUNGELECTRONICSCO.,LTD.:ct10:cvrN/A:
  dmi.product.name: R425/R525
  dmi.product.version: Not Applicable
  dmi.sys.vendor: SAMSUNG ELECTRONICS CO., LTD.

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