Public bug reported:

Running  kernel on Ubuntu 14.04.2.

At random times, (especially when touching the touchpad after not
touching it for a period of time), the display goes black !

Using QHD display resolution : 3200x1800

More information about hardware can be found here:

https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1434963

Otherwise 14.04.2 runs fine / perfectly on this brand-new machine.

It also seems to happen after the system had been successfully recovered
from suspending.

Also, it one time, just wanted to switch on to resume, and the whole
display went 'disco', meaning, it was flashing wildly, recovery
impossible...

Any help would be greatly appreciated, since HP claims they 'support' 14.04 on 
this Workstation.
--- 
ApportVersion: 2.14.1-0ubuntu3.7
Architecture: amd64
CurrentDesktop: Unity
DistroRelease: Ubuntu 14.04
InstallationDate: Installed on 2015-03-21 (2 days ago)
InstallationMedia: Ubuntu 14.04.2 LTS "Trusty Tahr" - Release amd64 (20150218.1)
Package: linux (not installed)
Tags:  trusty
Uname: Linux 4.0.0-040000rc5-generic x86_64
UnreportableReason: The running kernel is not an Ubuntu kernel
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo
_MarkForUpload: True
--- 
ApportVersion: 2.14.1-0ubuntu3.7
Architecture: amd64
AudioDevicesInUse:
 USER        PID ACCESS COMMAND
 /dev/snd/controlC0:  eric       1540 F.... pulseaudio
 /dev/snd/controlC1:  eric       1540 F.... pulseaudio
CurrentDesktop: Unity
DistroRelease: Ubuntu 14.04
HibernationDevice: RESUME=UUID=5565fff9-d47c-465c-9ef6-7bb37610caca
InstallationDate: Installed on 2015-03-21 (2 days ago)
InstallationMedia: Ubuntu 14.04.2 LTS "Trusty Tahr" - Release amd64 (20150218.1)
MachineType: Hewlett-Packard HP ZBook 15 G2
Package: linux (not installed)
ProcFB: 0 radeondrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.16.0-31-generic 
root=UUID=81792a20-09a6-47d9-be7f-0a6de44a41dd ro quiet splash vt.handoff=7
ProcVersionSignature: Ubuntu 3.16.0-31.43~14.04.1-generic 3.16.7-ckt5
RelatedPackageVersions:
 linux-restricted-modules-3.16.0-31-generic N/A
 linux-backports-modules-3.16.0-31-generic  N/A
 linux-firmware                             1.127.11
RfKill:
 0: phy0: Wireless LAN
        Soft blocked: yes
        Hard blocked: no
Tags:  trusty
Uname: Linux 3.16.0-31-generic x86_64
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo
_MarkForUpload: True
dmi.bios.date: 02/26/2015
dmi.bios.vendor: Hewlett-Packard
dmi.bios.version: M70 Ver. 01.07
dmi.board.name: 2253
dmi.board.vendor: Hewlett-Packard
dmi.board.version: KBC Version 03.10
dmi.chassis.type: 10
dmi.chassis.vendor: Hewlett-Packard
dmi.modalias: 
dmi:bvnHewlett-Packard:bvrM70Ver.01.07:bd02/26/2015:svnHewlett-Packard:pnHPZBook15G2:pvrA3008CD10003:rvnHewlett-Packard:rn2253:rvrKBCVersion03.10:cvnHewlett-Packard:ct10:cvr:
dmi.product.name: HP ZBook 15 G2
dmi.product.version: A3008CD10003
dmi.sys.vendor: Hewlett-Packard

** Affects: linux (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: apport-collected trusty

** Tags added: apport-collected trusty

** Description changed:

  Running  kernel on Ubuntu 14.04.2.
  
  At random times, (especially when touching the touchpad after not
  touching it for a period of time), the display goes black !
  
  Using QHD display resolution : 3200x1800
  
  More information about hardware can be found here:
  
  https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1434963
  
  Otherwise 14.04.2 runs fine / perfectly on this brand-new machine.
  
  It also seems to happen after the system had been successfully recovered
  from suspending.
  
  Also, it one time, just wanted to switch on to resume, and the whole
  display went 'disco', meaning, it was flashing wildly, recovery
  impossible...
  
- Any help would be greatly appreciated, since HP claims they 'support'
- 14.04 on this Workstation.
+ Any help would be greatly appreciated, since HP claims they 'support' 14.04 
on this Workstation.
+ --- 
+ ApportVersion: 2.14.1-0ubuntu3.7
+ Architecture: amd64
+ CurrentDesktop: Unity
+ DistroRelease: Ubuntu 14.04
+ InstallationDate: Installed on 2015-03-21 (2 days ago)
+ InstallationMedia: Ubuntu 14.04.2 LTS "Trusty Tahr" - Release amd64 
(20150218.1)
+ Package: linux (not installed)
+ Tags:  trusty
+ Uname: Linux 4.0.0-040000rc5-generic x86_64
+ UnreportableReason: The running kernel is not an Ubuntu kernel
+ UpgradeStatus: No upgrade log present (probably fresh install)
+ UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo
+ _MarkForUpload: True

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https://bugs.launchpad.net/bugs/1435584

Title:
  Randomly freezing display HP Zbook 15 G2 AMD FirePro M5100

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