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[jose <o1485726@xxxxxxxxx>]

Reposting https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1313804/comments/10
The fix has been commited: https://bugs.freedesktop.org/show_bug.cgi?id=42960#c57 , but apparently the patch hasn't been merged in any kernel in ubuntu.
Could you guys please merge it?

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https://bugs.launchpad.net/bugs/1093644

Title:
  [Samsung NP535U3C-A03DE] Blank screen on resume from suspend

Status in linux package in Ubuntu:
  Incomplete

Bug description:
  when resuming from suspend, the screen remains blank, while the system
  ist still operational (logging in using ssh works).

  * restarting X doesn't help ("sudo restart lightdm" through ssh)
  * disabling KMS (nomodeset) doesn't help, still blank screen after pm-suspend
  * updating to xorg-edgers kernel 3.7.0-7 doesn't help
  * mainline kernel from http://kernel.ubuntu.com/~kernel-ppa/mainline/daily/current/ (3.8.0.999) didn't work either
  * playing around with acpi_os_name had no effect

  I tried following the debugging instructions from
  https://wiki.ubuntu.com/DebuggingKernelSuspend, but I have no
  /sys/power/pm_trace (even on mainline kernel)

  The system is a brand new Samsung 535U3C-A03 with an AMD A4-4355M
  (integrated Radeon HD 7400G).

  ProblemType: Bug
  DistroRelease: Ubuntu 12.10
  Package: linux-image-3.5.0-21-generic 3.5.0-21.32
  ProcVersionSignature: Ubuntu 3.5.0-21.32-generic 3.5.7.1
  Uname: Linux 3.5.0-21-generic x86_64
  ApportVersion: 2.6.1-0ubuntu9
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC1:  galina     2104 F.... pulseaudio
   /dev/snd/controlC0:  galina     2104 F.... pulseaudio
  CRDA:
   country DE:
    (2400 - 2483 @ 40), (N/A, 20)
    (5150 - 5250 @ 40), (N/A, 20), NO-OUTDOOR
    (5250 - 5350 @ 40), (N/A, 20), NO-OUTDOOR, DFS
    (5470 - 5725 @ 40), (N/A, 26), DFS
  Date: Tue Dec 25 16:44:14 2012
  InstallationDate: Installed on 2012-12-24 (0 days ago)
  InstallationMedia: Ubuntu GNOME Remix 12.10 "Quantal Quetzal" - Release amd64(20121023)
  MachineType: SAMSUNG ELECTRONICS CO., LTD. 535U3C
  MarkForUpload: True
  ProcEnviron:
   LANGUAGE=de_DE:en
   PATH=(custom, no user)
   LANG=de_DE.UTF-8
   SHELL=/bin/bash
  ProcFB: 0 radeondrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.5.0-21-generic.efi.signed root=UUID=3d942843-dad1-48c0-b9d8-51ccff317810 ro quiet splash "acpi_os_name=Microsoft Windows NT" vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-3.5.0-21-generic N/A
   linux-backports-modules-3.5.0-21-generic  N/A
   linux-firmware                            1.98
  SourcePackage: linux
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 12/24/2012
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: P06RAS.W70.121224.LEO
  dmi.board.asset.tag: No Asset Tag
  dmi.board.name: NP535U3C-A03DE
  dmi.board.vendor: SAMSUNG ELECTRONICS CO., LTD.
  dmi.board.version: SEC_SW_REVISION_1234567890ABCD
  dmi.chassis.asset.tag: No Asset Tag
  dmi.chassis.type: 9
  dmi.chassis.vendor: SAMSUNG ELECTRONICS CO., LTD.
  dmi.chassis.version: N/A
  dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrP06RAS.W70.121224.LEO:bd12/24/2012:svnSAMSUNGELECTRONICSCO.,LTD.:pn535U3C:pvrP06RAS:rvnSAMSUNGELECTRONICSCO.,LTD.:rnNP535U3C-A03DE:rvrSEC_SW_REVISION_1234567890ABCD:cvnSAMSUNGELECTRONICSCO.,LTD.:ct9:cvrN/A:
  dmi.product.name: 535U3C
  dmi.product.version: P06RAS
  dmi.sys.vendor: SAMSUNG ELECTRONICS CO., LTD.

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