I installed the python apport script and ran it.
Al I see is an automated login to Launchpad and the message:

  Authorize application to access Launchpad on your behalf
  Almost finished ...

  The LinuxMint computer called Zeno now has access to your Launchpad account. 
  Within a few seconds, you should be able to start using its Launchpad 
integration features. 

  See all applications authorized to access Launchpad on your behalf.


  Authorized applications

  These applications have been authorized to access Launchpad on your behalf. 
  If you revoke an authorization, that application will not be allowed to do 
anything in Launchpad on your behalf.
  Claimed tokens:

  Application name: System-wide: LinuxMint (Zeno)

  Authorized, 18 seconds ago, to integrate an entire system

But I saw no results, no logfile. So eventually I revoked it.

Arnold


** Tags added: apport-collected serena

** Description changed:

  Hi all,
  
  I have a bugreport on Linux. After I logout als a adminstrator in Linux
  Mint v18.1 my system crashed with a bug listing on screen. This also
  happened a second time when I tried to switch to another user account.
  
  BUG: unable to handle kernel NULL pointer dereference at 0000000000000248
  IP: [<fff...>] amdgpu_vm_grab_id+0x122/0x310 [amdgpu]
  PDG 0
  Oops 0000 [#1] SMP
  Modules linked in: {long list ...}
  CPU: 1 PID: 182 Comm gfx Tainted: G W 4.4.0-31-generic #50 Ubuntu
  Hardware name: Dell Inc. Inspiron 5567/05VRRG, BIOS 1.0.2 09/09/2016
  ...
  
  Call Trace: 
  [<fff...>] amdgpu_ib_schedule+0x90/0x390 [amdgpu]
  {and a lot more...}
  ...
  
  The machine I bought is a: Dell Inspiron 5000 series 5567
  CPU - 7e generatie Intel® Core™ i7–7500U processor (4 MB cache, 2,70 GHz) 
  OS - Windows 10 Home (64-bits) {replaced it with Linux Mint 18.1 "Serena", 
based on Ubuntu 16.04}
  RAM - 8 GB Single Channel DDR4 2.400 MHz, tot 16 GB 
  HDD - 256 GB Solid State-harde schijf
  Graphics - AMD Radeon™ R7 M445 Graphics 4G GDDR5
  
  Installed Linux Mint 18.1 in Legacy mode & with Secure Boot disabled.
  
- Can someone help me out? If you need some additional information which
- helps to solve the problem, please let me know.
+ Can someone help me out? If you need some additional information which helps 
to solve the problem, please let me know.
+ --- 
+ ApportVersion: 2.20.1-0ubuntu2.4
+ Architecture: amd64
+ AudioDevicesInUse:
+  USER        PID ACCESS COMMAND
+  /dev/snd/controlC0:  zeno       2432 F.... pulseaudio
+ CurrentDesktop: X-Cinnamon
+ DistroRelease: Linux 18.1
+ EcryptfsInUse: Yes
+ HibernationDevice: RESUME=UUID=9421e732-bc17-474a-b35d-2973cf4a6043
+ InstallationDate: Installed on 2016-12-15 (3 days ago)
+ InstallationMedia: Linux Mint 18.1 "Serena" - Release amd64 20161128
+ MachineType: Dell Inc. Inspiron 5567
+ Package: linux (not installed)
+ ProcFB: 0 inteldrmfb
+ ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.4.0-53-generic 
root=/dev/mapper/mint--vg-root ro quiet splash vt.handoff=7
+ ProcVersionSignature: Ubuntu 4.4.0-53.74-generic 4.4.30
+ RelatedPackageVersions:
+  linux-restricted-modules-4.4.0-53-generic N/A
+  linux-backports-modules-4.4.0-53-generic  N/A
+  linux-firmware                            1.157.5
+ Tags:  serena
+ Uname: Linux 4.4.0-53-generic x86_64
+ UpgradeStatus: No upgrade log present (probably fresh install)
+ UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo users
+ _MarkForUpload: True
+ dmi.bios.date: 09/09/2016
+ dmi.bios.vendor: Dell Inc.
+ dmi.bios.version: 1.0.2
+ dmi.board.name: 05VRRG
+ dmi.board.vendor: Dell Inc.
+ dmi.board.version: A00
+ dmi.chassis.type: 9
+ dmi.chassis.vendor: Dell Inc.
+ dmi.modalias: 
dmi:bvnDellInc.:bvr1.0.2:bd09/09/2016:svnDellInc.:pnInspiron5567:pvr:rvnDellInc.:rn05VRRG:rvrA00:cvnDellInc.:ct9:cvr:
+ dmi.product.name: Inspiron 5567
+ dmi.sys.vendor: Dell Inc.

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https://bugs.launchpad.net/bugs/1650899

Title:
  ubuntu-bug linux - BUG: unable to handle kernel NULL pointer
  dereference at 0000000000000248

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