** Attachment added: "dmidecode.log"
   
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1093644/+attachment/3467584/+files/dmidecode.log

** Description changed:

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

Title:
  Blank screen on resume from suspend

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