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[Hadrien <launchpad@xxxxxxxxx>]

Thanks for the reply. Because 16.04 is out in two days, I will first try
the upgrade, and then if the bug is still there I will try the upstream
kernel.

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https://bugs.launchpad.net/bugs/1571297

Title:
  Freeze then kernel panic on wake-up

Status in linux package in Ubuntu:
  Incomplete

Bug description:
  I've been using the sleep mode feature of Ubuntu for years and it used
  to work very well. Since some days ago, I am experimenting problems:

  * I put the computer to sleep mode.
  * Later I wake-up the computer.
  * The computer wakes-up incompletely: I can move the mouse cursor but clicking has no effect.

  I try to recover from that problem:

  * I login in a console with Ctrl+Alt+F1 then kill all my processes.
  * The login screen appears and I can again interact with the GUI.
  * I login and it seems I can use the computer normally.
  * I start playing a video, several seconds later I experiment:
      * a total freeze of the computer with the exception of the mouse cursor (the keyboard does not work anymore);
      * a kernel panic. I usually have a null pointer error (I think it is in a function called send_vblank_event), and once I had a random page fault.

  Because the computer locks when I play a video, I suspect a graphics
  problem. I have an old Radeon graphics card (HD 4870) and I use the
  Mesa drivers. Here is the latest update I did on my computer. There
  was a new version of the kernel:

  Start-Date: 2016-04-13  17:03:40
  Commandline: aptdaemon role='role-commit-packages' sender=':1.106'
  Install: linux-headers-4.2.0-35:amd64 (4.2.0-35.40, automatic), linux-headers-4.2.0-35-generic:amd64 (4.2.0-35.40, automatic), linux-image-extra-4.2.0-35-generic:amd64 (4.2.0-35.40, automatic), linux-image-4.2.0-35-generic:amd64 (4.2.0-35.40, automatic)
  Upgrade: linux-headers-generic:amd64 (4.2.0.34.37, 4.2.0.35.38), adobe-flashplugin:amd64 (20160310.1-0ubuntu0.15.10.1, 20160407.1-0ubuntu0.15.10.1), firefox-locale-fr:amd64 (45.0+build2-0ubuntu0.15.10.1, 45.0.1+build1-0ubuntu0.15.10.2), libllvm3.4:amd64 (3.4.2-13ubuntu2, 3.4.2-13ubuntu2.1), arc-theme:amd64 (1458777611.2047cbe, 1459454111.c561afa), firefox:amd64 (45.0+build2-0ubuntu0.15.10.1, 45.0.1+build1-0ubuntu0.15.10.2), thermald:amd64 (1.4.3-5, 1.4.3-5ubuntu1), xnview:amd64 (0.78-dhor1~wily, 0.79-dhor1~wily), llvm-3.4-runtime:amd64 (3.4.2-13ubuntu2, 3.4.2-13ubuntu2.1), llvm-3.4:amd64 (3.4.2-13ubuntu2, 3.4.2-13ubuntu2.1), llvm-3.4-dev:amd64 (3.4.2-13ubuntu2, 3.4.2-13ubuntu2.1), libpq-dev:amd64 (9.4.6-0ubuntu0.15.10, 9.4.7-0ubuntu0.15.10), xserver-xorg-video-openchrome:amd64 (0.3.3-1ubuntu1, 0.3.3-1ubuntu1.1), adobe-flash-properties-gtk:amd64 (20160310.1-0ubuntu0.15.10.1, 20160407.1-0ubuntu0.15.10.1), linux-libc-dev:amd64 (4.2.0-34.39, 4.2.0-35.40), libpq5:amd64 (9.4.6-0ubuntu0.15.10, 9.4.7-0ubuntu0.15.10), linux-image-generic:amd64 (4.2.0.34.37, 4.2.0.35.38), linux-generic:amd64 (4.2.0.34.37, 4.2.0.35.38)
  End-Date: 2016-04-13  17:05:28

  ProblemType: Bug
  DistroRelease: Ubuntu 15.10
  Package: linux-image-4.2.0-35-generic 4.2.0-35.40
  ProcVersionSignature: Ubuntu 4.2.0-35.40-generic 4.2.8-ckt5
  Uname: Linux 4.2.0-35-generic x86_64
  ApportVersion: 2.19.1-0ubuntu5
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  hadrien    1798 F.... pulseaudio
   /dev/snd/controlC1:  hadrien    1798 F.... pulseaudio
  CurrentDesktop: Unity
  Date: Sun Apr 17 09:56:57 2016
  EcryptfsInUse: Yes
  HibernationDevice: RESUME=UUID=5b1c27c7-d6a5-4a22-b338-f0be04c070fe
  InstallationDate: Installed on 2013-10-20 (909 days ago)
  InstallationMedia: Ubuntu 13.10 "Saucy Salamander" - Release amd64 (20131016.1)
  IwConfig:
   eth0      no wireless extensions.
   
   lo        no wireless extensions.
  MachineType: Gigabyte Technology Co., Ltd. P55-UD3
  ProcFB: 0 radeondrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.2.0-35-generic root=UUID=6ed824e6-8d9c-4383-913b-ca2bd564bfcb ro quiet splash init=/lib/systemd/systemd-bootchart vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-4.2.0-35-generic N/A
   linux-backports-modules-4.2.0-35-generic  N/A
   linux-firmware                            1.149.3
  RfKill:
   
  SourcePackage: linux
  UpgradeStatus: Upgraded to wily on 2015-10-22 (177 days ago)
  dmi.bios.date: 06/23/2010
  dmi.bios.vendor: Award Software International, Inc.
  dmi.bios.version: F9
  dmi.board.name: P55-UD3
  dmi.board.vendor: Gigabyte Technology Co., Ltd.
  dmi.board.version: x.x
  dmi.chassis.type: 3
  dmi.chassis.vendor: Gigabyte Technology Co., Ltd.
  dmi.modalias: dmi:bvnAwardSoftwareInternational,Inc.:bvrF9:bd06/23/2010:svnGigabyteTechnologyCo.,Ltd.:pnP55-UD3:pvr:rvnGigabyteTechnologyCo.,Ltd.:rnP55-UD3:rvrx.x:cvnGigabyteTechnologyCo.,Ltd.:ct3:cvr:
  dmi.product.name: P55-UD3
  dmi.sys.vendor: Gigabyte Technology Co., Ltd.

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