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["R. Becke" <subscribe.becke@xxxxxxxxx>]

I've installed the latest kernel:
Linux version 4.6.0-040600rc6-generic (kernel@gloin) (gcc version 5.2.1 20151010 (Ubuntu 5.2.1-22ubuntu2) ) #201605012031 SMP Mon May 2 00:33:26 UTC 2016

But the issue is still the same and I still get:
...
May  7 09:26:32 hp-elitebook-840-g1--s0-v2 kernel: [   82.052343] radeon 0000:03:00.0: WB enabled
May  7 09:26:32 hp-elitebook-840-g1--s0-v2 kernel: [   82.052346] radeon 0000:03:00.0: fence driver on ring 0 use gpu addr 0x0000000040000c00 and cpu addr 0xffff88043499bc00
May  7 09:26:32 hp-elitebook-840-g1--s0-v2 kernel: [   82.052347] radeon 0000:03:00.0: fence driver on ring 1 use gpu addr 0x0000000040000c04 and cpu addr 0xffff88043499bc04
May  7 09:26:32 hp-elitebook-840-g1--s0-v2 kernel: [   82.052348] radeon 0000:03:00.0: fence driver on ring 2 use gpu addr 0x0000000040000c08 and cpu addr 0xffff88043499bc08
May  7 09:26:32 hp-elitebook-840-g1--s0-v2 kernel: [   82.052350] radeon 0000:03:00.0: fence driver on ring 3 use gpu addr 0x0000000040000c0c and cpu addr 0xffff88043499bc0c
May  7 09:26:32 hp-elitebook-840-g1--s0-v2 kernel: [   82.052351] radeon 0000:03:00.0: fence driver on ring 4 use gpu addr 0x0000000040000c10 and cpu addr 0xffff88043499bc10
May  7 09:26:32 hp-elitebook-840-g1--s0-v2 kernel: [   82.053893] radeon 0000:03:00.0: fence driver on ring 5 use gpu addr 0x0000000000075a18 and cpu addr 0xffffc90003035a18
May  7 09:26:32 hp-elitebook-840-g1--s0-v2 kernel: [   82.154397] radeon 0000:03:00.0: VCE init error (-110).
May  7 09:26:32 hp-elitebook-840-g1--s0-v2 kernel: [   82.388497] [drm] ring test on 0 succeeded in 1 usecs
May  7 09:26:32 hp-elitebook-840-g1--s0-v2 kernel: [   82.388504] [drm] ring test on 1 succeeded in 1 usecs
May  7 09:26:32 hp-elitebook-840-g1--s0-v2 kernel: [   82.388509] [drm] ring test on 2 succeeded in 1 usecs
May  7 09:26:32 hp-elitebook-840-g1--s0-v2 kernel: [   82.388518] [drm] ring test on 3 succeeded in 5 usecs
May  7 09:26:32 hp-elitebook-840-g1--s0-v2 kernel: [   82.388525] [drm] ring test on 4 succeeded in 4 usecs
May  7 09:26:32 hp-elitebook-840-g1--s0-v2 kernel: [   82.564268] [drm] ring test on 5 succeeded in 2 usecs
May  7 09:26:32 hp-elitebook-840-g1--s0-v2 kernel: [   82.564274] [drm] UVD initialized successfully.
May  7 09:26:32 hp-elitebook-840-g1--s0-v2 kernel: [   82.564310] [drm] ib test on ring 0 succeeded in 0 usecs
May  7 09:26:32 hp-elitebook-840-g1--s0-v2 kernel: [   82.564341] [drm] ib test on ring 1 succeeded in 0 usecs
May  7 09:26:32 hp-elitebook-840-g1--s0-v2 kernel: [   82.564372] [drm] ib test on ring 2 succeeded in 0 usecs
May  7 09:26:32 hp-elitebook-840-g1--s0-v2 kernel: [   82.564401] [drm] ib test on ring 3 succeeded in 0 usecs
May  7 09:26:32 hp-elitebook-840-g1--s0-v2 kernel: [   82.564430] [drm] ib test on ring 4 succeeded in 0 usecs
May  7 09:26:33 hp-elitebook-840-g1--s0-v2 kernel: [   83.212279] [drm] ib test on ring 5 succeeded
May  7 09:26:33 hp-elitebook-840-g1--s0-v2 kernel: [   83.594507] [drm:radeon_dp_link_train [radeon]] *ERROR* clock recovery reached max voltage
May  7 09:26:33 hp-elitebook-840-g1--s0-v2 kernel: [   83.594523] [drm:radeon_dp_link_train [radeon]] *ERROR* clock recovery failed
May  7 09:26:33 hp-elitebook-840-g1--s0-v2 ntpd[1069]: Soliciting pool server 46.235.147.2
May  7 09:26:33 hp-elitebook-840-g1--s0-v2 kernel: [   83.845395] [drm:radeon_dp_link_train [radeon]] *ERROR* clock recovery reached max voltage
May  7 09:26:33 hp-elitebook-840-g1--s0-v2 kernel: [   83.845410] [drm:radeon_dp_link_train [radeon]] *ERROR* clock recovery failed
...

@R1dO - did you do anything else besides updating the kernel? Do you
have a hybrid card? What is the output of the following command: "lspci
-k | grep VGA"?

Thx

-- 
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/1573648

Title:
  16.04 -> AMD APU via VGA gives blank screen

Status in linux package in Ubuntu:
  Confirmed

Bug description:
  After upgrade to 16.04, the system will only show a blank screen when a monitor is connected to the VGA output.
  The system itself is able to completely start-up (checked via a ssh login).

  Starting up using an older kernel (in this case 4.2.0) gives a
  functional graphical system.

  Possibly related dmesg lines (when booting 4.4.0):
    kernel: [    9.131059] [drm:radeon_dp_link_train [radeon]] *ERROR* clock recovery reached max voltage
    kernel: [    9.131088] [drm:radeon_dp_link_train [radeon]] *ERROR* clock recovery failed

  It might be related to the following kernel post (but i am not entirely sure):
    https://lists.freedesktop.org/archives/dri-devel/2016-March/102222.html

  ProblemType: Bug
  DistroRelease: Ubuntu 16.04
  Package: linux-image-4.4.0-21-generic 4.4.0-21.37
  ProcVersionSignature: Ubuntu 4.2.0-35.40-generic 4.2.8-ckt5
  Uname: Linux 4.2.0-35-generic x86_64
  ApportVersion: 2.20.1-0ubuntu2
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC1:  rene       2014 F.... pulseaudio
   /dev/snd/controlC0:  rene       2014 F.... pulseaudio
  CurrentDesktop: Unity
  Date: Fri Apr 22 16:29:44 2016
  HibernationDevice: RESUME=UUID=98dbb6ee-ff08-4e9f-b01d-55b2f28c6a1e
  InstallationDate: Installed on 2015-12-29 (114 days ago)
  InstallationMedia: Xubuntu 15.10 "Wily Werewolf" - Release amd64 (20151021)
  IwConfig:
   lo        no wireless extensions.
   
   enp1s0    no wireless extensions.
  MachineType: To Be Filled By O.E.M. To Be Filled By O.E.M.
  ProcFB: 0 radeondrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.2.0-35-generic.efi.signed root=/dev/mapper/VGelmo-LVroot ro quiet splash 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                            1.157
  RfKill:
   
  SourcePackage: linux
  UpgradeStatus: Upgraded to xenial on 2016-04-21 (0 days ago)
  dmi.bios.date: 12/04/2015
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: P1.90
  dmi.board.name: FM2A68M-HD+
  dmi.board.vendor: ASRock
  dmi.chassis.asset.tag: To Be Filled By O.E.M.
  dmi.chassis.type: 3
  dmi.chassis.vendor: To Be Filled By O.E.M.
  dmi.chassis.version: To Be Filled By O.E.M.
  dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrP1.90:bd12/04/2015:svnToBeFilledByO.E.M.:pnToBeFilledByO.E.M.:pvrToBeFilledByO.E.M.:rvnASRock:rnFM2A68M-HD+:rvr:cvnToBeFilledByO.E.M.:ct3:cvrToBeFilledByO.E.M.:
  dmi.product.name: To Be Filled By O.E.M.
  dmi.product.version: To Be Filled By O.E.M.
  dmi.sys.vendor: To Be Filled By O.E.M.

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