Thank you for reporting this bug to Ubuntu. Ubuntu 14.10 (utopic) reached end-of-life on July 23, 2015.
See this document for currently supported Ubuntu releases: https://wiki.ubuntu.com/Releases We appreciate that this bug may be old and you might not be interested in discussing it any more. But if you are then please upgrade to the latest Ubuntu version and re-test. If you then find the bug is still present in the newer Ubuntu version, please add a comment here telling us which new version it is in and change the bug status to Confirmed. ** Changed in: xorg (Ubuntu) Status: Triaged => Won't Fix -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to xorg in Ubuntu. https://bugs.launchpad.net/bugs/1386834 Title: Second display stops working on repeated detection Status in xorg package in Ubuntu: Won't Fix Bug description: The first time a secondary display/projector is connected to my laptop, it is detected and works in mirrored mode. However, once I open System Settings > Displays, the seconday display gets disabled. Loging out and rebooting doesn't solve the problem. At least not right away. A few reboots later secondary display starts working again. Occasioally I'm able to use Fn+F4 to switch between different modes (mirrored, extended), but it usually doesn't last long. As soon as System Settings is activated, the secondary display is disable and no longer detected. Additional clues: 1) If I leave a display plugged in and reboot, it is activated on login screen, but shuts off as soon as I login. Pressing 'Detect Displays' button is Displays settings does not bring it back. 2) Every time I open System Settings (even without external displayed plugged in) there is a short lag and even the moust stops moving for about a second. The following shows up in the log: Oct 28 11:34:12 hostname kernel: [ 649.193034] [drm] probing gen 2 caps for device 8086:9c18 = 5323c42/0 Oct 28 11:34:12 hostname kernel: [ 649.193038] [drm] PCIE gen 2 link speeds already enabled Oct 28 11:34:12 hostname kernel: [ 649.197195] [drm] PCIE GART of 1024M enabled (table at 0x0000000000276000). Oct 28 11:34:12 hostname kernel: [ 649.197453] radeon 0000:03:00.0: WB enabled Oct 28 11:34:12 hostname kernel: [ 649.197455] radeon 0000:03:00.0: fence driver on ring 0 use gpu addr 0x0000000040000c00 and cpu addr 0xffff880432d0cc00 Oct 28 11:34:12 hostname kernel: [ 649.197457] radeon 0000:03:00.0: fence driver on ring 1 use gpu addr 0x0000000040000c04 and cpu addr 0xffff880432d0cc04 Oct 28 11:34:12 hostname kernel: [ 649.197458] radeon 0000:03:00.0: fence driver on ring 2 use gpu addr 0x0000000040000c08 and cpu addr 0xffff880432d0cc08 Oct 28 11:34:12 hostname kernel: [ 649.197459] radeon 0000:03:00.0: fence driver on ring 3 use gpu addr 0x0000000040000c0c and cpu addr 0xffff880432d0cc0c Oct 28 11:34:12 hostname kernel: [ 649.197460] radeon 0000:03:00.0: fence driver on ring 4 use gpu addr 0x0000000040000c10 and cpu addr 0xffff880432d0cc10 Oct 28 11:34:12 hostname kernel: [ 649.198991] radeon 0000:03:00.0: fence driver on ring 5 use gpu addr 0x0000000000075a18 and cpu addr 0xffffc90012535a18 Oct 28 11:34:12 hostname kernel: [ 649.388989] [drm] ring test on 0 succeeded in 1 usecs Oct 28 11:34:12 hostname kernel: [ 649.388994] [drm] ring test on 1 succeeded in 1 usecs Oct 28 11:34:12 hostname kernel: [ 649.388998] [drm] ring test on 2 succeeded in 1 usecs Oct 28 11:34:12 hostname kernel: [ 649.389009] [drm] ring test on 3 succeeded in 2 usecs Oct 28 11:34:12 hostname kernel: [ 649.389016] [drm] ring test on 4 succeeded in 1 usecs Oct 28 11:34:12 hostname kernel: [ 649.574547] [drm] ring test on 5 succeeded in 2 usecs Oct 28 11:34:12 hostname kernel: [ 649.574553] [drm] UVD initialized successfully. Oct 28 11:34:12 hostname kernel: [ 649.574583] [drm] ib test on ring 0 succeeded in 0 usecs Oct 28 11:34:12 hostname kernel: [ 649.574610] [drm] ib test on ring 1 succeeded in 0 usecs Oct 28 11:34:12 hostname kernel: [ 649.574637] [drm] ib test on ring 2 succeeded in 0 usecs Oct 28 11:34:12 hostname kernel: [ 649.574664] [drm] ib test on ring 3 succeeded in 0 usecs Oct 28 11:34:12 hostname kernel: [ 649.574692] [drm] ib test on ring 4 succeeded in 0 usecs Oct 28 11:34:13 hostname kernel: [ 649.725287] [drm] ib test on ring 5 succeeded 3) Some plugging and unplugging of the display occasionally shows the same messages in the log followed by the following: Oct 28 11:34:13 hostname kernel: [ 649.734010] snd_hda_intel 0000:03:00.1: Enabling via VGA-switcheroo Oct 28 11:34:13 hostname kernel: [ 649.734117] snd_hda_intel 0000:03:00.1: irq 70 for MSI/MSI-X Oct 28 11:34:18 hostname kernel: [ 654.876455] snd_hda_intel 0000:03:00.1: Disabling via VGA-switcheroo Oct 28 11:34:18 hostname kernel: [ 654.908444] snd_hda_intel 0000:03:00.1: Cannot lock devices! ProblemType: Bug DistroRelease: Ubuntu 14.10 Package: xorg 1:7.7+7ubuntu2 ProcVersionSignature: Ubuntu 3.16.0-23.31-generic 3.16.4 Uname: Linux 3.16.0-23-generic x86_64 .tmp.unity.support.test.0: ApportVersion: 2.14.7-0ubuntu8 Architecture: amd64 CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins' CompositorRunning: compiz CompositorUnredirectDriverBlacklist: '(nouveau|Intel).*Mesa 8.0' CompositorUnredirectFSW: true CurrentDesktop: Unity Date: Tue Oct 28 11:26:19 2014 DistUpgraded: 2014-10-24 11:32:59,179 DEBUG enabling apt cron job DistroCodename: utopic DistroVariant: ubuntu EcryptfsInUse: Yes ExtraDebuggingInterest: Yes, if not too technical GraphicsCard: Intel Corporation Haswell-ULT Integrated Graphics Controller [8086:0a16] (rev 0b) (prog-if 00 [VGA controller]) Subsystem: Hewlett-Packard Company Device [103c:198f] Advanced Micro Devices, Inc. [AMD/ATI] Mars [Radeon HD 8730M] [1002:6601] (prog-if 00 [VGA controller]) Subsystem: Hewlett-Packard Company Device [103c:1990] InstallationDate: Installed on 2014-10-06 (22 days ago) InstallationMedia: Ubuntu 14.04.1 LTS "Trusty Tahr" - Release amd64 (20140722.2) MachineType: Hewlett-Packard HP EliteBook 840 G1 ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.16.0-23-generic.efi.signed root=UUID=e9a30923-65a7-4f5d-90ad-c34a241f1c73 ro quiet splash vt.handoff=7 SourcePackage: xorg Symptom: display UpgradeStatus: Upgraded to utopic on 2014-10-24 (3 days ago) dmi.bios.date: 10/09/2013 dmi.bios.vendor: Hewlett-Packard dmi.bios.version: L71 Ver. 01.04 dmi.board.name: 198F dmi.board.vendor: Hewlett-Packard dmi.board.version: KBC Version 15.50 dmi.chassis.asset.tag: CNU347DHK4 dmi.chassis.type: 10 dmi.chassis.vendor: Hewlett-Packard dmi.modalias: dmi:bvnHewlett-Packard:bvrL71Ver.01.04:bd10/09/2013:svnHewlett-Packard:pnHPEliteBook840G1:pvrA3009DD10303:rvnHewlett-Packard:rn198F:rvrKBCVersion15.50:cvnHewlett-Packard:ct10:cvr: dmi.product.name: HP EliteBook 840 G1 dmi.product.version: A3009DD10303 dmi.sys.vendor: Hewlett-Packard version.compiz: compiz 1:0.9.12+14.10.20140918-0ubuntu1 version.ia32-libs: ia32-libs 20090808ubuntu36 version.libdrm2: libdrm2 2.4.56-1 version.libgl1-mesa-dri: libgl1-mesa-dri 10.3.0-0ubuntu3 version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A version.libgl1-mesa-glx: libgl1-mesa-glx 10.3.0-0ubuntu3 version.xserver-xorg-core: xserver-xorg-core 2:1.16.0-1ubuntu1 version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.9.0-1ubuntu2 version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.4.0-2ubuntu2 version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.914-1~exp1ubuntu4 version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.11-1ubuntu2 xserver.bootTime: Tue Oct 28 11:23:31 2014 xserver.configfile: default xserver.errors: RADEON(G0): [XvMC] Failed to initialize extension. xserver.logfile: /var/log/Xorg.0.log xserver.outputs: product id 4669 vendor AUO xserver.version: 2:1.16.0-1ubuntu1 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1386834/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
