This bug is missing log files that will aid in diagnosing the problem. >From a terminal window please run:
apport-collect 1579481 and then change the status of the bug to 'Confirmed'. If, due to the nature of the issue you have encountered, you are unable to run this command, please add a comment stating that fact and change the bug status to 'Confirmed'. This change has been made by an automated script, maintained by the Ubuntu Kernel Team. ** Changed in: linux (Ubuntu) Status: New => Incomplete -- 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/1579481 Title: 16.04 -> External Monitor not working -> radeon VCE init error (-110) Status in linux package in Ubuntu: Incomplete Bug description: Since I've upgraded 15.10 to 16.04 my external monitor is not working anymore. Whether I plug it directly into the DVI port of my laptop ("HP EliteBook 840 G1") or whether I plug it into the DVI or VGA port of my docking station "HP 2013 UltraSlim-Dockingstation" I get the following error in "/var/log/syslog": ... May 4 19:20:17 hp-elitebook-840-g1--s0-v2 kernel: [ 63.377223] radeon 0000:03:00.0: VCE init error (-110). May 4 19:20:18 hp-elitebook-840-g1--s0-v2 kernel: [ 64.811603] [drm:radeon_dp_link_train [radeon]] *ERROR* clock recovery reached max voltage May 4 19:20:18 hp-elitebook-840-g1--s0-v2 kernel: [ 64.811619] [drm:radeon_dp_link_train [radeon]] *ERROR* clock recovery failed ... I tried as well a fresh 16.04 install but this still did not help. The full log related to plugging in an external monitor is: ... May 4 19:20:16 hp-elitebook-840-g1--s0-v2 kernel: [ 62.573716] i915 0000:00:02.0: BAR 6: [??? 0x00000000 flags 0x2] has bogus alignment May 4 19:20:16 hp-elitebook-840-g1--s0-v2 kernel: [ 62.578032] i915 0000:00:02.0: BAR 6: [??? 0x00000000 flags 0x2] has bogus alignment May 4 19:20:16 hp-elitebook-840-g1--s0-v2 kernel: [ 62.578106] acpi PNP0501:00: Still not present May 4 19:20:16 hp-elitebook-840-g1--s0-v2 kernel: [ 62.578184] i915 0000:00:02.0: BAR 6: [??? 0x00000000 flags 0x2] has bogus alignment May 4 19:20:17 hp-elitebook-840-g1--s0-v2 kernel: [ 63.267945] [drm] probing gen 2 caps for device 8086:9c18 = 5323c42/0 May 4 19:20:17 hp-elitebook-840-g1--s0-v2 kernel: [ 63.267950] [drm] PCIE gen 2 link speeds already enabled May 4 19:20:17 hp-elitebook-840-g1--s0-v2 kernel: [ 63.275081] [drm] PCIE GART of 2048M enabled (table at 0x00000000002E8000). May 4 19:20:17 hp-elitebook-840-g1--s0-v2 kernel: [ 63.275187] radeon 0000:03:00.0: WB enabled May 4 19:20:17 hp-elitebook-840-g1--s0-v2 kernel: [ 63.275190] radeon 0000:03:00.0: fence driver on ring 0 use gpu addr 0x0000000040000c00 and cpu addr 0xffff880434a83c00 May 4 19:20:17 hp-elitebook-840-g1--s0-v2 kernel: [ 63.275191] radeon 0000:03:00.0: fence driver on ring 1 use gpu addr 0x0000000040000c04 and cpu addr 0xffff880434a83c04 May 4 19:20:17 hp-elitebook-840-g1--s0-v2 kernel: [ 63.275192] radeon 0000:03:00.0: fence driver on ring 2 use gpu addr 0x0000000040000c08 and cpu addr 0xffff880434a83c08 May 4 19:20:17 hp-elitebook-840-g1--s0-v2 kernel: [ 63.275194] radeon 0000:03:00.0: fence driver on ring 3 use gpu addr 0x0000000040000c0c and cpu addr 0xffff880434a83c0c May 4 19:20:17 hp-elitebook-840-g1--s0-v2 kernel: [ 63.275195] radeon 0000:03:00.0: fence driver on ring 4 use gpu addr 0x0000000040000c10 and cpu addr 0xffff880434a83c10 May 4 19:20:17 hp-elitebook-840-g1--s0-v2 kernel: [ 63.276738] radeon 0000:03:00.0: fence driver on ring 5 use gpu addr 0x0000000000075a18 and cpu addr 0xffffc90002835a18 May 4 19:20:17 hp-elitebook-840-g1--s0-v2 kernel: [ 63.377223] radeon 0000:03:00.0: VCE init error (-110). May 4 19:20:17 hp-elitebook-840-g1--s0-v2 kernel: [ 63.612628] [drm] ring test on 0 succeeded in 1 usecs May 4 19:20:17 hp-elitebook-840-g1--s0-v2 kernel: [ 63.612635] [drm] ring test on 1 succeeded in 1 usecs May 4 19:20:17 hp-elitebook-840-g1--s0-v2 kernel: [ 63.612640] [drm] ring test on 2 succeeded in 1 usecs May 4 19:20:17 hp-elitebook-840-g1--s0-v2 kernel: [ 63.612650] [drm] ring test on 3 succeeded in 5 usecs May 4 19:20:17 hp-elitebook-840-g1--s0-v2 kernel: [ 63.612658] [drm] ring test on 4 succeeded in 5 usecs May 4 19:20:17 hp-elitebook-840-g1--s0-v2 kernel: [ 63.788345] [drm] ring test on 5 succeeded in 2 usecs May 4 19:20:17 hp-elitebook-840-g1--s0-v2 kernel: [ 63.788352] [drm] UVD initialized successfully. May 4 19:20:17 hp-elitebook-840-g1--s0-v2 kernel: [ 63.788388] [drm] ib test on ring 0 succeeded in 0 usecs May 4 19:20:17 hp-elitebook-840-g1--s0-v2 kernel: [ 63.788421] [drm] ib test on ring 1 succeeded in 0 usecs May 4 19:20:17 hp-elitebook-840-g1--s0-v2 kernel: [ 63.788453] [drm] ib test on ring 2 succeeded in 0 usecs May 4 19:20:17 hp-elitebook-840-g1--s0-v2 kernel: [ 63.788483] [drm] ib test on ring 3 succeeded in 0 usecs May 4 19:20:17 hp-elitebook-840-g1--s0-v2 kernel: [ 63.788514] [drm] ib test on ring 4 succeeded in 0 usecs May 4 19:20:18 hp-elitebook-840-g1--s0-v2 kernel: [ 64.437532] [drm] ib test on ring 5 succeeded May 4 19:20:18 hp-elitebook-840-g1--s0-v2 kernel: [ 64.811603] [drm:radeon_dp_link_train [radeon]] *ERROR* clock recovery reached max voltage May 4 19:20:18 hp-elitebook-840-g1--s0-v2 kernel: [ 64.811619] [drm:radeon_dp_link_train [radeon]] *ERROR* clock recovery failed May 4 19:20:18 hp-elitebook-840-g1--s0-v2 kernel: [ 65.062599] [drm:radeon_dp_link_train [radeon]] *ERROR* clock recovery reached max voltage May 4 19:20:18 hp-elitebook-840-g1--s0-v2 kernel: [ 65.062614] [drm:radeon_dp_link_train [radeon]] *ERROR* clock recovery failed ... I tried as well upgrading to the latest kernel as described here: https://wiki.ubuntu.com/KernelMainlineBuilds - latest v4.6 kernel[0] But this did not help either. Some further details: # lspci -k | grep VGA 00:02.0 VGA compatible controller: Intel Corporation Haswell-ULT Integrated Graphics Controller (rev 0b) 03:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Mars [Radeon HD 8730M] (rev ff) # xrandr --listproviders Providers: number : 3 Provider 0: id: 0x6d cap: 0x9, Source Output, Sink Offload crtcs: 4 outputs: 6 associated providers: 2 name:Intel Provider 1: id: 0x43 cap: 0x6, Sink Output, Source Offload crtcs: 2 outputs: 2 associated providers: 2 name:OLAND @ pci:0000:03:00.0 Provider 2: id: 0x43 cap: 0x6, Sink Output, Source Offload crtcs: 2 outputs: 2 associated providers: 2 name:OLAND @ pci:0000:03:00.0 This bug could be related to: "https://bugzilla.redhat.com/show_bug.cgi?id=1262649" but I could nowhere find any answers when it will be fixed or what is the root cause. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1579481/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp