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[Urs Fleisch <1375995@xxxxxxxxxxxxxxxxxx>]

I have this problem since I have this PC (2011-12-03), i.e. I always
have to hibernate before I can suspend to RAM with all Ubuntu releases
since 11.10. I also tried the procedure described in
DebuggingKernelSuspend in the past and tried to remove various kernel
modules but without success.

I have now followed the procedure described in DebuggingKernelSuspend
and attached the wakeup and dmesg.txt files. After trying to resume from
suspend, the LEDs and the noise from the DVD-RW are the same as with a
successful resume. However, the display stays dark and I cannot connect
to the system over the network (ping or SSH).

The magic number in dmesg is

[    2.088671]   Magic number: 2:310:476

but there is no "hash matches" line.

** Attachment added: "cat /proc/acpi/wakeup > wakeup before suspend to RAM"
   https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1375995/+attachment/4224381/+files/wakeup

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https://bugs.launchpad.net/bugs/1375995

Title:
  [HP Compaq dc7800 Small Form Factor PC] suspend/resume failure

Status in “linux” package in Ubuntu:
  Incomplete

Bug description:
  Suspend to RAM fails on HP Compaq dc7800p, the PC will not wake up
  again. It only works if I suspend to disk before, then I can suspend
  to RAM afterwards (as many time as needed) until the PC is rebooted
  again.

  ProblemType: KernelOops
  DistroRelease: Ubuntu 14.10
  Package: linux-image-3.16.0-18-generic 3.16.0-18.25
  ProcVersionSignature: Ubuntu 3.16.0-18.25-generic 3.16.3
  Uname: Linux 3.16.0-18-generic x86_64
  Annotation: This occured during a previous suspend and prevented it from resuming properly.
  ApportVersion: 2.14.7-0ubuntu2
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  urs        1849 F.... lxpanel
  CRDA: Error: [Errno 2] No such file or directory: 'iw'
  Date: Tue Sep 30 20:44:46 2014
  DuplicateSignature: suspend/resume:Hewlett-Packard HP Compaq dc7800p Small Form Factor:786F1 v01.32
  ExecutablePath: /usr/share/apport/apportcheckresume
  Failure: suspend/resume
  HibernationDevice: RESUME=UUID=c338e9df-bc69-4692-b108-88cfd64982a7
  InstallationDate: Installed on 2014-09-28 (2 days ago)
  InstallationMedia: Lubuntu 14.10 "Utopic Unicorn" - Alpha amd64 (20140923)
  InterpreterPath: /usr/bin/python3.4
  IwConfig:
   eth0      no wireless extensions.
   
   lo        no wireless extensions.
  MachineType: Hewlett-Packard HP Compaq dc7800p Small Form Factor
  ProcCmdline: /usr/bin/python3 /usr/share/apport/apportcheckresume
  ProcEnviron:
   TERM=linux
   PATH=(custom, no user)
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.16.0-18-generic root=UUID=6475de33-f0cf-4e4a-b155-bac5d4c61b27 ro quiet splash vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-3.16.0-18-generic N/A
   linux-backports-modules-3.16.0-18-generic  N/A
   linux-firmware                             1.134
  RfKill:
   
  SourcePackage: linux
  Title: [Hewlett-Packard HP Compaq dc7800p Small Form Factor] suspend/resume failure
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups:
   
  dmi.bios.date: 07/21/2011
  dmi.bios.vendor: Hewlett-Packard
  dmi.bios.version: 786F1 v01.32
  dmi.board.asset.tag: CZC81885DS
  dmi.board.name: 0AA8h
  dmi.board.vendor: Hewlett-Packard
  dmi.chassis.asset.tag: CZC81885DS
  dmi.chassis.type: 4
  dmi.chassis.vendor: Hewlett-Packard
  dmi.modalias: dmi:bvnHewlett-Packard:bvr786F1v01.32:bd07/21/2011:svnHewlett-Packard:pnHPCompaqdc7800pSmallFormFactor:pvr:rvnHewlett-Packard:rn0AA8h:rvr:cvnHewlett-Packard:ct4:cvr:
  dmi.product.name: HP Compaq dc7800p Small Form Factor
  dmi.sys.vendor: Hewlett-Packard

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